Abstract

The effect of electron irradiation (5-140 kGy) on the spectral properties of bismuth active centers (BACs) in Bi/Er codoped aluminosilicate fibers (BEDFs) has been studied. It is revealed that the near-infrared (NIR) emitting BACs exhibit high radiation resistance, evidenced by the negligible change in the saturable absorption and on-off gain of BACs. In contrast, the radiation-induced absorption (RIA) increases sharply with the increasing radiation dose. The contribution of each of the defects to the RIA level has been analyzed, and it is found to be mainly linked to the generation of Al-OHC in the Al2O3-SiO2 host. Furthermore, the thermal annealing on the irradiated BEDFs has also been investigated, revealing the higher thermal stability of BACs due to the thermal bleaching of Al-OHC. This is the first time that the BACs show good resistance to the strong electron irradiation.

© 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

1. Introduction

Since the first demonstration of broadband near-infrared (NIR) luminescence from bismuth-doped silicate glass in 1999 [1], intensive research has been devoted to the Bi-doped optical fibers (BDFs) for numerous practical applications (e.g. superluminescent sources, fiber lasers and broadband amplifiers) in the spectral range 1.15 to 1.5 and 1.6 to 1.8 µm [2,3]. The ultrabroadband properties of Bi-doped fibers benefit from the existence of multiple BACs associated with various codopants [46]. However, it turned out that the laser efficiency of BDF-based lasers to date is still lower compared to the rare-earth-doped analogues, especially for Bi-doped aluminosilicate fibers emitting from 1.15 to 1.3 µm (η∼25%) [7,8]. This is due to the limited knowledge of the nature of NIR emitting BACs. Consequently, various post-treatment approaches have been proposed to modify the spectral properties of BACs. In particular, laser-induced effects have been repeatedly reported to shed some light on the nature of BACs [911]. Recently, Peng et al. demonstrated a novel Bi-functionalized grating inside the borosilicate glasses with the direct femtosecond laser writing method, paving a new way towards extending the amplification bandwidth of an optical waveguide in the micro-region [12]. On the other hand, growing attention is paid to the effects of ionizing (x-rays, γ-rays) and particle irradiation (electrons, neurons) since the applications of BDFs have extended to the astrophysical field such as space amplifiers and fiber gyroscopes [13,14]. For fibers operating in such environments, high radiation resistance should be maintained. In fact, a few papers have addressed the influence of γ-irradiation on the optical properties of BDFs with various glass hosts [1517]. However, it turns out that BDFs with the electron beam (E-beam) irradiation, as an alternative particle radiation source with low penetration, has not been systematically studied. E.M. Dianov et al. firstly reported the effect of E-beam irradiation on the optical attenuation of Bi/Al and Bi/Ge silicate fibers, revealing the high susceptibility of BDFs to the E-beam irradiation [18]. However, the radiation resistance of BACs (as an independent unit) is not evaluated. The underlying mechanism for radiation-induced absorption has not been discussed, especially the contribution of each of the radiation-induced defects. Moreover, the effect of E-beam irradiation on the gain properties of BACs has not been presented, and the thermal stability of E-beam irradiated BACs has not been investigated.

Therefore, in this paper, we systematically investigated the effect of E-beam (5-140 kGy) on the spectral behaviors of BACs in Bi/Er codoped aluminosilicate fibers (BEDFs) through a series of experiments. Based on the experimental results, the radiation resistance of multiple BACs is evaluated. The underlying mechanism of the radiation-induced absorption (RIA) is elucidated. Furthermore, the thermal stabilities of the pristine and irradiated BEDFs are studied. These results bring new insights into the nature of BACs and the operating conditions of BEDFs as the practical gain medium.

2. Experimental section

The BEDF sample was fabricated by conventional modified chemical vapor deposition (MCVD) method. The Bi, Er and Al were incorporated into the silica preform by in situ solution doping. Thereafter, the silicate preform was drawn into a single mode fiber with a core diameter of 3.5 µm with a cut-off wavelength of 954 nm. The refractive index profile of the drawn BEDF was measured using the 3D fiber index analyzer, as shown in Fig. 1. The equivalent refractive index difference was about 0.02 with a sharp dip in the center, which is mainly due to the depletion of bismuth (TBi-boiling ∼1560 °C) during the collapse. The core concentrations of main dopants of the BEDF were estimated as: [Bi] ∼0.1, [Al] ∼0.1, [Ge] ∼4.24, [Er] ∼0.006 at% by the energy dispersive X-ray (EDX) analysis (inset of Fig. 1). Subsequently, four consecutive sections (L ∼0.7 m for each) from the same BEDF were prepared for E-beam irradiation. E-beam irradiation was performed at INFLPR “travelling-wave” linear accelerator, operating at about 5.5 MeV, for a beam current of 3.5 to 5 µA. During the radiation exposure, the optical fiber samples were located at 60 cm from the accelerator exit window, while the dose rate was 26.7 Gy/s, as measured with a graphite calorimeter. The fibers under test (FUTs) were prepaid by splicing the two ends of the electron irradiated BEDF (10 cm; radiation dose: 5, 25, 75 and 140 kGy) with two single-mode fibers 1550 (SMF1550). In this way, the FUTs were kept consistent for all the experiments. The two splice losses (Ts1 and Ts2) were monitored by the fusion splicer (< 1 dB) and compensated for all the experiments. The luminescence was measured by the backward pumping scheme, where the luminescence signal was collected by an optical spectral analyzer (OSA, Agilent 86140B) in the range 900-1600 nm with the commercially available laser diodes operating at 830 and 980 nm.

 

Fig. 1. Refractive index profile of the pristine BEDF. The inset shows the concentration distribution of dopants across the fiber core region.

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3. Experimental results and discussion

Firstly, the insertion absorption spectra of the FUTs in the range 500-1600 nm before and after electron irradiation were measured by the single photon analyzer (shamrock SR-500), and is shown in Fig. 2.

 

Fig. 2. Insertion absorption spectra of the FUTs before and after electron irradiation in the range 500-1600 nm. Inset: the enlarged part of the absorption spectra from 500 to 750 nm for all the FUTs.

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As seen in Fig. 2, multiple Bi-related absorption bands are observed and can be classified into two categories: (i) BAC-Al for 500 (A),700 (B) and 1000 nm (D) [19], (ii) BAC-Si for 816 (C) and 1400 nm (E) [20]. It is seen that the shape of the BAC absorption bands is mildly affected by irradiation. However, one can notice a remarkable increase in the optical absorption level after irradiation. Interestingly, there appears an additional absorption band peaking at 560 nm after strong irradiation (∼140 kGy) (inset of Fig. 2), and it becomes more pronounced with increasing irradiation dose. This additional absorption band has been confirmed to be associated with Al-related oxygen hole center (Al-OHC) point defects [16,21]. Apparently, the incorporation of Al into the BEDFs greatly enhances the radiation sensitivity. To clearly interpret the rise in the optical absorption, the RIA spectra are derived from the optical absorption spectra between the pristine and irradiated fibers (5-140 kGy), as shown in Fig. 3. It is seen that the RIA level is wavelength dependent and reaches the maximum at 560 nm due to the presence of Al-OHC defects. Also, the RIA level becomes higher with the increase of irradiation dose.

 

Fig. 3. RIA spectra in the range 700-1600 nm of BEDFs irradiated to doses of 5-140 kGy. Inset: the RIA spectra of the BEDF and EDF irradiated to 140 kGy and the RIA difference between them.

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To determine the change of background loss from the RIA spectra, the unsaturable losses at wavelengths of 830 (BAC-Si) and 980 nm (BAC-Al) were measured in BEDFs before and after E-beam irradiation. It should be noted that there is a negligible effect of Er3+ at 980 nm which we cannot rule out. However, the effect of Er3+ can be reasonably neglected due to the extremely low concentration of our fiber and the fact that the Er-related defects contributing to RIA are very small (the Er-associated RCC at λ = 1300 nm is 0.18 dB/m with a doping level of 0.04 mol%) [22]. Typical results are shown in Figs. 4(a) and 4(b). As seen in Fig. 4(a), the plateau for each curve represents the unsaturable loss level (αuns) at 980 nm. With increasing radiation dose to 140 kGy, αuns increases from 36.6 to 48.1 dB/m. The increase of αuns (∼11.4 dB/m) is nearly the same as the increased small signal absorption (α) at 980 nm, suggesting that the observed growth of RIA at this wavelength should arise from the induced background loss instead of the change of BAC-Al. Similarly, the increase of αuns at 830 nm is also identical to the growth of small signal absorption at different radiation doses, whereas the active absorption (referred as saturable loss αs, αsuns=α) remains unchanged (αs ∼12 dB/m) (Fig. 4(b)), indicating the high radiation resistance of BAC-Si. However, the useful pump absorption, namely the pump efficiency (Figure of Merit, defined as the ratio of αs to α) has been reduced notably from 21.6 to 12.8%, indicating the detrimental effect of electron irradiation on the pump efficiency. Based on the results of the unsaturable loss, it is clear that the observed RIA accounts for the background loss which originates from the multiple defects (SiE’, GeE’, Bi/Er-related color center (RCC), Al-OHC).

 

Fig. 4. (a) Pump absorption of the BEDFs before and after irradiation at λex = 980 nm. (b) Unsaturable loss, saturable loss and figure of merit as a function of radiation dose at 830 nm.

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In order to clarify and determine the contribution of each of the defects for the observed RIA, an erbium-doped fiber (EDF) having the same Er3+ and Al concentration as the BEDF was also irradiated with 140 kGy as a reference (inset of Fig. 3). Firstly, it is well known that the contribution of Er-related RCC is negligible [22] and usually overshadowed by the presence of RCC with the host glass (e.g. P-OHC, Al-OHC), especially considering the fact that the Er3+ concentration in our BEDFs is extremely low (∼0.006 at%). Therefore, the significant RIA (inset of Fig. 3) of the EDF should primarily arise from the presence of Al-OHC. By subtracting the RIA spectrum of EDF from that of BEDF under 140 kGy, the Bi-related RCC can be obtained. It is seen that the RIA level induced by Bi-related RCC is much lower (4 times lower at 540 nm) compared to Al-OHC, suggesting the dominant contribution of Al-OHC to the RIA in our irradiated BEDFs. However, it is noticed that the RIA level from 1200 to 1600 nm is slightly increased and mainly caused by the Bi-related RCC in this region. Similar behavior is also observed in Bi-doped germanosilicate fiber [23].

The results of optical absorption and unsaturable loss are also in good agreement with the luminescence data. Under excitation at 980 nm (Fig. 5(a)), the peak luminescence intensities of BAC-Al (∼1190 nm) and Er3+ (∼1536 nm) decrease monotonically with increasing radiation dose. Similar behavior is observed for BAC-Si at 1430 nm under excitation at 830 nm (Fig. 5(b)). Obviously, the degraded luminescence of BACs results from the induced background loss instead of the reduction of BACs, especially the radiation-induced darkening effect of Al-OHC point defects [16]. Further to the luminescence characterization, the effect of E-beam irradiation on the gain properties of BEDFs was also investigated.

 

Fig. 5. Luminescence spectra of the BEDFs irradiated to doses of 5-140 kGy upon excitation at (a) 980 nm and (b) 830 nm.

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The typical on-off gain (gFUT, defined as the pump-induced transmission change over the FUT without considering the ground state absorption, see [24,25] for more details) spectra of BEDFs before and after irradiation upon excitation of 980 and 830 nm are illustrated in Figs. 6(a)–(d). Under 980 nm pumping (Fig. 6(a)), only one predominant on-off gain ascribed to Er3+ peaking at 1536 nm is observed. In contrast, the broadband ESA from 1000 to 1400 nm is observed and attributed to BAC-Al. Still, it is seen that the shapes of on-off gain spectra are insignificantly affected by the E-beam irradiation, further confirming the high radiation resistance of BACs.

 

Fig. 6. On-off gain spectra of the FUTs before and after electron radiation (5-140 kGy) under 980 and 830 nm pumping, respectively (a, c) and (b, d) The on-off gain and net gain values at 1100 and 1536 nm versus radiation dose under 980 and 830 nm pumping, respectively.

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However, as seen in Fig. 6(b), the net gain (GFUT, true amplification including the ground state absorption) of BAC-Al and Er3+ decrease drastically with increasing radiation dose. Similar phenomena are also shown under 830 nm pumping (Figs. 6(c) and (d)). Although the amount of BACs involved in the stimulated emission for amplification doesn’t change, however, the electron irradiation does have detrimental effects on the amplification and lasing properties of BEDFs because the induced excessive background loss leads to a high lasing threshold and lower slope efficiency.

At last, the thermal annealing (∼500 °C) effect on the luminescence and absorption properties of irradiated BEDFs (∼140 kGy) was also investigated, as shown in Figs. 7(a) and 7(b). As seen in Fig. 7(a), during the heating process, the luminescence of BAC-Al in both pristine and irradiated fibers reduce significantly with the increasing temperature, and almost vanishes at 500 °C. However, it is observed that the luminescence of the pristine fiber degrades more quickly than the irradiated fiber. During the cooling process, the luminescence at 1190 nm for both fibers shows a recovery trend with the decrease in temperature. Still, a larger percentage of luminescence is recovered (∼71.4%) in the irradiated fiber than the pristine one (∼42.4%). This coincides with the trend of ΔαT, where the ΔαT level is two-times higher in the pristine fiber upon recovering to room temperature (inset of Fig. 7(b)).

 

Fig. 7. (a) Evolution of luminescence at 1190 nm of pristine and irradiated (140 kGy) BEDFs during heating and cooling. (b) Heat induced loss ΔαT at 1300 nm of pristine and irradiated fibers versus temperature. Inset: heat induced loss spectra of pristine and irradiated fibers after heating and subsequent cooling to room temperature.

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More specifically, there is noticeable thermal bleaching in the electron irradiated BEDF at a relatively low temperature (∼300 °C), whereas the thermal darkening is aggravated with increasing temperature in the pristine fiber (Fig. 7(b)). The thermal bleaching phenomenon strongly confirms the annihilation of Al-OHC point defects, which has been reported in the irradiated Yb-doped aluminosilicate fibers [26,27]. On the other hand, it is known that the high annealing temperature (600 °C) leads to the precipitation of metallic bismuth nanoparticles [28], introducing strong thermal darkening effect which contributes to the background loss in Bi-doped fibers. Thus, it is reasonable to deduce that the decrease in luminescence results from the thermal-induced background loss and a reduced number of active bismuth ions [26]. Nevertheless, due to the alleviation of thermal bleaching of Al-OHC defect points in the irradiated fiber, it features a slower decrease rate and a higher recovery ratio compared to the pristine one. This strongly implies that the thermal stability of our homemade BEDF is enhanced after high E-beam irradiation.

4. Conclusion

In conclusion, the effect of electron irradiation (5-140 kGy) on the spectral characteristics of BEDFs (Bi ∼0.1 at%) has been systematically investigated. Firstly, it was revealed that the NIR emitting BACs exhibit high radiation resistance, evidenced by the negligible change of active absorption and on-off gain of BACs after electron irradiation. Secondly, the radiation-induced absorption is found to be wavelength dependent and mainly caused by the generation of Al-OHC point defects. Finally, the thermal effect on the luminescence and absorption properties of BAC-Al of the irradiated (140 kGy) fiber has been investigated, revealing the higher thermal stability of the irradiated BEDF. Our findings bring new insights for the understanding of nature of NIR emitting BACs and are of interest for: (i) the fundamental study of structural modification and glass-network rearrangement initiated by different irradiation sources and (ii) the potential applications for Bi-doped aluminosilicate fibers in harsh environments.

Funding

National Natural Science Foundation of China (61520106014, 61675032); Science and Technology Commission of Shanghai Municipality (SKLSFO2018-02).

Acknowledgment

Authors are thankful for the technical support of E-beam irradiation experiments carried out in the National Institute for Laser, Plasma and Radiation Physics Center for Advanced Laser Technologies, Romania.

Disclosures

The authors declare no conflicts of interest.

References

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2. S. V. Firstov, S. V. Alyshev, K. E. Riumkin, A. M. Khegai, A. V. Kharakhordin, M. A. Melkumov, and E. M. Dianov, “Laser-active fibers doped with Bismuth for a wavelength region of 1.6–1.8 µm,” IEEE J. Sel. Top. Quantum Electron. 24(5), 1–15 (2018). [CrossRef]  

3. E. M. Dianov, V. Dvoyrin, V. M. Mashinsky, A. A. Umnikov, M. V. Yashkov, and A. N. Gur’yanov, “CW bismuth fibre laser,” Quantum Electron. 35(12), 1083–1084 (2005). [CrossRef]  

4. S. V. Firstov, V. F. Khopin, I. A. Bufetov, E. G. Firstova, A. N. Guryanov, and E. M. Dianov, “Combined excitation-emission spectroscopy of bismuth active centers in optical fibers,” Opt. Express 19(20), 19551–19561 (2011). [CrossRef]  

5. E. G. Firstova, I. A. Bufetov, V. F. Khopin, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, K. N. Nishchev, A. N. Gur’yanov, and E. M. Dianov, “Luminescence properties of IR-emitting bismuth centres in SiO2-based glasses in the UV to near-IR spectral region,” Quantum Electron. 45(1), 59–65 (2015). [CrossRef]  

6. I. A. Bufetov, S. L. Semenov, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, and E. M. Dianov, “Optical properties of active bismuth centres in silica fibres containing no other dopants,” Quantum Electron. 40(7), 639–641 (2010). [CrossRef]  

7. I. A. Bufetov, M. A. Melkumov, S. V. Firstov, K. E. Riumkin, A. V. Shubin, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Bi-Doped Optical Fibers and Fiber Lasers,” IEEE J. Sel. Top. Quantum Electron. 20(5), 111–125 (2014). [CrossRef]  

8. E. M. Dianov, “Bismuth-doped optical fibres: A new breakthrough in near-IR lasing media,” Quantum Electron. 42(9), 754–761 (2012). [CrossRef]  

9. S. Firstov, S. Alyshev, V. Khopin, M. Melkumov, A. Guryanov, and E. Dianov, “Photobleaching effect in bismuth-doped germanosilicate fibers,” Opt. Express 23(15), 19226–19233 (2015). [CrossRef]  

10. S. V. Firstov, S. V. Alyshev, E. G. Firstova, M. A. Melkumov, A. M. Khegay, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Dependence of the photobleaching on laser radiation wavelength in bismuth-doped germanosilicate fibers,” J. Lumin. 182(1), 87–90 (2017). [CrossRef]  

11. S. V. Firstov, S. V. Alyshev, A. V. Kharakhordin, K. E. Riumkin, and E. M. Dianov, “Laser-induced bleaching and thermo-stimulated recovery of luminescent centers in bismuth-doped optical fibers,” Opt. Mater. Express 7(9), 3422–3432 (2017). [CrossRef]  

12. L. Wang, J. Cao, Y. Lu, X. Li, S. Xu, Q. Zhang, Z. Yang, and M. Peng, “In situ instant generation of an ultrabroadband near-infrared emission center in bismuth-doped borosilicate glasses via a femtosecond laser,” Photonics Res. 7(3), 300–310 (2019). [CrossRef]  

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25. K. E. Riumkin, M. A. Melkumov, I. A. Varfolomeev, A. V. Shubin, I. A. Bufetov, S. V. Firstov, V. F. Khopin, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Excited-state absorption in various bismuth-doped fibers,” Opt. Lett. 39(8), 2503–2506 (2014). [CrossRef]  

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References

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  1. K. Murata, Y. Fujimoto, T. Kanabe, H. Fujita, and M. Nakatsuka, “Bi-doped SiO2 as a new laser material for an intense laser,” Fusion Eng. Des. 44(1-4), 437–439 (1999).
    [Crossref]
  2. S. V. Firstov, S. V. Alyshev, K. E. Riumkin, A. M. Khegai, A. V. Kharakhordin, M. A. Melkumov, and E. M. Dianov, “Laser-active fibers doped with Bismuth for a wavelength region of 1.6–1.8 µm,” IEEE J. Sel. Top. Quantum Electron. 24(5), 1–15 (2018).
    [Crossref]
  3. E. M. Dianov, V. Dvoyrin, V. M. Mashinsky, A. A. Umnikov, M. V. Yashkov, and A. N. Gur’yanov, “CW bismuth fibre laser,” Quantum Electron. 35(12), 1083–1084 (2005).
    [Crossref]
  4. S. V. Firstov, V. F. Khopin, I. A. Bufetov, E. G. Firstova, A. N. Guryanov, and E. M. Dianov, “Combined excitation-emission spectroscopy of bismuth active centers in optical fibers,” Opt. Express 19(20), 19551–19561 (2011).
    [Crossref]
  5. E. G. Firstova, I. A. Bufetov, V. F. Khopin, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, K. N. Nishchev, A. N. Gur’yanov, and E. M. Dianov, “Luminescence properties of IR-emitting bismuth centres in SiO2-based glasses in the UV to near-IR spectral region,” Quantum Electron. 45(1), 59–65 (2015).
    [Crossref]
  6. I. A. Bufetov, S. L. Semenov, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, and E. M. Dianov, “Optical properties of active bismuth centres in silica fibres containing no other dopants,” Quantum Electron. 40(7), 639–641 (2010).
    [Crossref]
  7. I. A. Bufetov, M. A. Melkumov, S. V. Firstov, K. E. Riumkin, A. V. Shubin, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Bi-Doped Optical Fibers and Fiber Lasers,” IEEE J. Sel. Top. Quantum Electron. 20(5), 111–125 (2014).
    [Crossref]
  8. E. M. Dianov, “Bismuth-doped optical fibres: A new breakthrough in near-IR lasing media,” Quantum Electron. 42(9), 754–761 (2012).
    [Crossref]
  9. S. Firstov, S. Alyshev, V. Khopin, M. Melkumov, A. Guryanov, and E. Dianov, “Photobleaching effect in bismuth-doped germanosilicate fibers,” Opt. Express 23(15), 19226–19233 (2015).
    [Crossref]
  10. S. V. Firstov, S. V. Alyshev, E. G. Firstova, M. A. Melkumov, A. M. Khegay, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Dependence of the photobleaching on laser radiation wavelength in bismuth-doped germanosilicate fibers,” J. Lumin. 182(1), 87–90 (2017).
    [Crossref]
  11. S. V. Firstov, S. V. Alyshev, A. V. Kharakhordin, K. E. Riumkin, and E. M. Dianov, “Laser-induced bleaching and thermo-stimulated recovery of luminescent centers in bismuth-doped optical fibers,” Opt. Mater. Express 7(9), 3422–3432 (2017).
    [Crossref]
  12. L. Wang, J. Cao, Y. Lu, X. Li, S. Xu, Q. Zhang, Z. Yang, and M. Peng, “In situ instant generation of an ultrabroadband near-infrared emission center in bismuth-doped borosilicate glasses via a femtosecond laser,” Photonics Res. 7(3), 300–310 (2019).
    [Crossref]
  13. G. Sandoval-Romero, “Study of a superluminescent fiber radiator as a pumping source for a fiber-optic gyroscope,” J. Opt. Technol. 74(8), 573–578 (2007).
    [Crossref]
  14. X. Suo, Y. Yang, M. Yang, X. Shi, and S. Zhao, “High stability and radiation-resistance broadband fiber-optic source,” in Advanced Sensor Systems and Applications IV (International Society for Optics and Photonics2010), p. 78533Z.
  15. S. V. Firstov, V. F. Khopin, S. V. Alyshev, E. G. Firstova, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Guryanov, and E. M. Dianov, “Effect of gamma-irradiation on the optical properties of bismuth-doped germanosilicate fibers,” Opt. Mater. Express 6(10), 3303–3308 (2016).
    [Crossref]
  16. J. Wen, W. Liu, Y. Dong, Y. Luo, G.-D. Peng, N. Chen, F. Pang, Z. Chen, and T. Wang, “Radiation-induced photoluminescence enhancement of Bi/Al-codoped silica optical fibers via atomic layer deposition,” Opt. Express 23(22), 29004–29013 (2015).
    [Crossref]
  17. M. Peng, J. Qiu, D. Chen, X. Meng, and C. Zhu, “Superbroadband 1310 nm emission from bismuth and tantalum codoped germanium oxide glasses,” Opt. Lett. 30(18), 2433–2435 (2005).
    [Crossref]
  18. A. V. Kir’yanov, V. V. Dvoyrin, V. M. Mashinsky, N. N. Il’ichev, N. S. Kozlova, and E. M. Dianov, “Influence of electron irradiation on optical properties of Bismuth doped silica fibers,” Opt. Express 19(7), 6599–6608 (2011).
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  19. V. V. Dvoyrin, A. V. Kir’yanov, V. M. Mashinsky, O. I. Medvedkov, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Absorption, gain, and laser action in bismuth-doped aluminosilicate optical fibers,” IEEE J. Quantum Electron. 46(2), 182–190 (2010).
    [Crossref]
  20. I. A. Bufetov, M. A. Melkumov, S. V. Firstov, A. V. Shubin, S. L. Semenov, V. V. Vel’miskin, A. E. Levchenko, E. G. Firstova, and E. M. Dianov, “Optical gain and laser generation in bismuth-doped silica fibers free of other dopants,” Opt. Lett. 36(2), 166–168 (2011).
    [Crossref]
  21. K. L. Brower, “Electron paramagnetic resonance of AIE1’ centers in vitreous silica,” Phys. Rev. B 20(5), 1799–1811 (1979).
    [Crossref]
  22. M. E. Likhachev, M. M. Bubnov, K. V. Zotov, A. L. Tomashuk, D. S. Lipatov, M. V. Yashkov, and A. N. Guryanov, “Radiation resistance of Er-doped silica fibers: Effect of host glass composition,” J. Lightwave Technol. 31(5), 749–755 (2013).
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  23. S. V. Firstov, V. F. Khopin, A. V. E. Kharakhordin, S. V. Alyshev, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Gur’yanov, and E. M. Dianov, “Radiation-induced absorption in bismuth-doped germanosilicate fibres,” Quantum Electron. 47(12), 1120–1124 (2017).
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  24. M. P. Kalita, S. Yoo, and J. Sahu, “Bismuth doped fiber laser and study of unsaturable loss and pump induced absorption in laser performance,” Opt. Express 16(25), 21032–21038 (2008).
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  25. K. E. Riumkin, M. A. Melkumov, I. A. Varfolomeev, A. V. Shubin, I. A. Bufetov, S. V. Firstov, V. F. Khopin, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Excited-state absorption in various bismuth-doped fibers,” Opt. Lett. 39(8), 2503–2506 (2014).
    [Crossref]
  26. T. Deschamps, H. Vezin, C. Gonnet, and N. Ollier, “Evidence of AlOHC responsible for the radiation-induced darkening in Yb doped fiber,” Opt. Express 21(7), 8382–8392 (2013).
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  27. M. Leich, U. Röpke, S. Jetschke, S. Unger, V. Reichel, and J. Kirchhof, “Non-isothermal bleaching of photodarkened Yb-doped fibers,” Opt. Express 17(15), 12588–12593 (2009).
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  28. S. Wei, Y. Luo, M. Ding, F. Cai, G. Xiao, D. Fan, Q. Zhao, and G.-D. Peng, “Thermal effect on attenuation and luminescence of Bi/Er Co-doped fiber,” IEEE Photonics Technol. Lett. 29(1), 43–46 (2017).
    [Crossref]

2019 (1)

L. Wang, J. Cao, Y. Lu, X. Li, S. Xu, Q. Zhang, Z. Yang, and M. Peng, “In situ instant generation of an ultrabroadband near-infrared emission center in bismuth-doped borosilicate glasses via a femtosecond laser,” Photonics Res. 7(3), 300–310 (2019).
[Crossref]

2018 (1)

S. V. Firstov, S. V. Alyshev, K. E. Riumkin, A. M. Khegai, A. V. Kharakhordin, M. A. Melkumov, and E. M. Dianov, “Laser-active fibers doped with Bismuth for a wavelength region of 1.6–1.8 µm,” IEEE J. Sel. Top. Quantum Electron. 24(5), 1–15 (2018).
[Crossref]

2017 (4)

S. V. Firstov, S. V. Alyshev, E. G. Firstova, M. A. Melkumov, A. M. Khegay, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Dependence of the photobleaching on laser radiation wavelength in bismuth-doped germanosilicate fibers,” J. Lumin. 182(1), 87–90 (2017).
[Crossref]

S. V. Firstov, S. V. Alyshev, A. V. Kharakhordin, K. E. Riumkin, and E. M. Dianov, “Laser-induced bleaching and thermo-stimulated recovery of luminescent centers in bismuth-doped optical fibers,” Opt. Mater. Express 7(9), 3422–3432 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, A. V. E. Kharakhordin, S. V. Alyshev, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Gur’yanov, and E. M. Dianov, “Radiation-induced absorption in bismuth-doped germanosilicate fibres,” Quantum Electron. 47(12), 1120–1124 (2017).
[Crossref]

S. Wei, Y. Luo, M. Ding, F. Cai, G. Xiao, D. Fan, Q. Zhao, and G.-D. Peng, “Thermal effect on attenuation and luminescence of Bi/Er Co-doped fiber,” IEEE Photonics Technol. Lett. 29(1), 43–46 (2017).
[Crossref]

2016 (1)

2015 (3)

J. Wen, W. Liu, Y. Dong, Y. Luo, G.-D. Peng, N. Chen, F. Pang, Z. Chen, and T. Wang, “Radiation-induced photoluminescence enhancement of Bi/Al-codoped silica optical fibers via atomic layer deposition,” Opt. Express 23(22), 29004–29013 (2015).
[Crossref]

E. G. Firstova, I. A. Bufetov, V. F. Khopin, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, K. N. Nishchev, A. N. Gur’yanov, and E. M. Dianov, “Luminescence properties of IR-emitting bismuth centres in SiO2-based glasses in the UV to near-IR spectral region,” Quantum Electron. 45(1), 59–65 (2015).
[Crossref]

S. Firstov, S. Alyshev, V. Khopin, M. Melkumov, A. Guryanov, and E. Dianov, “Photobleaching effect in bismuth-doped germanosilicate fibers,” Opt. Express 23(15), 19226–19233 (2015).
[Crossref]

2014 (2)

K. E. Riumkin, M. A. Melkumov, I. A. Varfolomeev, A. V. Shubin, I. A. Bufetov, S. V. Firstov, V. F. Khopin, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Excited-state absorption in various bismuth-doped fibers,” Opt. Lett. 39(8), 2503–2506 (2014).
[Crossref]

I. A. Bufetov, M. A. Melkumov, S. V. Firstov, K. E. Riumkin, A. V. Shubin, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Bi-Doped Optical Fibers and Fiber Lasers,” IEEE J. Sel. Top. Quantum Electron. 20(5), 111–125 (2014).
[Crossref]

2013 (2)

2012 (1)

E. M. Dianov, “Bismuth-doped optical fibres: A new breakthrough in near-IR lasing media,” Quantum Electron. 42(9), 754–761 (2012).
[Crossref]

2011 (3)

2010 (2)

V. V. Dvoyrin, A. V. Kir’yanov, V. M. Mashinsky, O. I. Medvedkov, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Absorption, gain, and laser action in bismuth-doped aluminosilicate optical fibers,” IEEE J. Quantum Electron. 46(2), 182–190 (2010).
[Crossref]

I. A. Bufetov, S. L. Semenov, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, and E. M. Dianov, “Optical properties of active bismuth centres in silica fibres containing no other dopants,” Quantum Electron. 40(7), 639–641 (2010).
[Crossref]

2009 (1)

2008 (1)

2007 (1)

2005 (2)

M. Peng, J. Qiu, D. Chen, X. Meng, and C. Zhu, “Superbroadband 1310 nm emission from bismuth and tantalum codoped germanium oxide glasses,” Opt. Lett. 30(18), 2433–2435 (2005).
[Crossref]

E. M. Dianov, V. Dvoyrin, V. M. Mashinsky, A. A. Umnikov, M. V. Yashkov, and A. N. Gur’yanov, “CW bismuth fibre laser,” Quantum Electron. 35(12), 1083–1084 (2005).
[Crossref]

1999 (1)

K. Murata, Y. Fujimoto, T. Kanabe, H. Fujita, and M. Nakatsuka, “Bi-doped SiO2 as a new laser material for an intense laser,” Fusion Eng. Des. 44(1-4), 437–439 (1999).
[Crossref]

1979 (1)

K. L. Brower, “Electron paramagnetic resonance of AIE1’ centers in vitreous silica,” Phys. Rev. B 20(5), 1799–1811 (1979).
[Crossref]

Alyshev, S.

Alyshev, S. V.

S. V. Firstov, S. V. Alyshev, K. E. Riumkin, A. M. Khegai, A. V. Kharakhordin, M. A. Melkumov, and E. M. Dianov, “Laser-active fibers doped with Bismuth for a wavelength region of 1.6–1.8 µm,” IEEE J. Sel. Top. Quantum Electron. 24(5), 1–15 (2018).
[Crossref]

S. V. Firstov, S. V. Alyshev, E. G. Firstova, M. A. Melkumov, A. M. Khegay, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Dependence of the photobleaching on laser radiation wavelength in bismuth-doped germanosilicate fibers,” J. Lumin. 182(1), 87–90 (2017).
[Crossref]

S. V. Firstov, S. V. Alyshev, A. V. Kharakhordin, K. E. Riumkin, and E. M. Dianov, “Laser-induced bleaching and thermo-stimulated recovery of luminescent centers in bismuth-doped optical fibers,” Opt. Mater. Express 7(9), 3422–3432 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, A. V. E. Kharakhordin, S. V. Alyshev, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Gur’yanov, and E. M. Dianov, “Radiation-induced absorption in bismuth-doped germanosilicate fibres,” Quantum Electron. 47(12), 1120–1124 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, S. V. Alyshev, E. G. Firstova, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Guryanov, and E. M. Dianov, “Effect of gamma-irradiation on the optical properties of bismuth-doped germanosilicate fibers,” Opt. Mater. Express 6(10), 3303–3308 (2016).
[Crossref]

Brower, K. L.

K. L. Brower, “Electron paramagnetic resonance of AIE1’ centers in vitreous silica,” Phys. Rev. B 20(5), 1799–1811 (1979).
[Crossref]

Bubnov, M. M.

Bufetov, I. A.

E. G. Firstova, I. A. Bufetov, V. F. Khopin, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, K. N. Nishchev, A. N. Gur’yanov, and E. M. Dianov, “Luminescence properties of IR-emitting bismuth centres in SiO2-based glasses in the UV to near-IR spectral region,” Quantum Electron. 45(1), 59–65 (2015).
[Crossref]

I. A. Bufetov, M. A. Melkumov, S. V. Firstov, K. E. Riumkin, A. V. Shubin, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Bi-Doped Optical Fibers and Fiber Lasers,” IEEE J. Sel. Top. Quantum Electron. 20(5), 111–125 (2014).
[Crossref]

K. E. Riumkin, M. A. Melkumov, I. A. Varfolomeev, A. V. Shubin, I. A. Bufetov, S. V. Firstov, V. F. Khopin, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Excited-state absorption in various bismuth-doped fibers,” Opt. Lett. 39(8), 2503–2506 (2014).
[Crossref]

S. V. Firstov, V. F. Khopin, I. A. Bufetov, E. G. Firstova, A. N. Guryanov, and E. M. Dianov, “Combined excitation-emission spectroscopy of bismuth active centers in optical fibers,” Opt. Express 19(20), 19551–19561 (2011).
[Crossref]

I. A. Bufetov, M. A. Melkumov, S. V. Firstov, A. V. Shubin, S. L. Semenov, V. V. Vel’miskin, A. E. Levchenko, E. G. Firstova, and E. M. Dianov, “Optical gain and laser generation in bismuth-doped silica fibers free of other dopants,” Opt. Lett. 36(2), 166–168 (2011).
[Crossref]

I. A. Bufetov, S. L. Semenov, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, and E. M. Dianov, “Optical properties of active bismuth centres in silica fibres containing no other dopants,” Quantum Electron. 40(7), 639–641 (2010).
[Crossref]

Bufetova, G. A.

E. G. Firstova, I. A. Bufetov, V. F. Khopin, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, K. N. Nishchev, A. N. Gur’yanov, and E. M. Dianov, “Luminescence properties of IR-emitting bismuth centres in SiO2-based glasses in the UV to near-IR spectral region,” Quantum Electron. 45(1), 59–65 (2015).
[Crossref]

I. A. Bufetov, S. L. Semenov, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, and E. M. Dianov, “Optical properties of active bismuth centres in silica fibres containing no other dopants,” Quantum Electron. 40(7), 639–641 (2010).
[Crossref]

Cai, F.

S. Wei, Y. Luo, M. Ding, F. Cai, G. Xiao, D. Fan, Q. Zhao, and G.-D. Peng, “Thermal effect on attenuation and luminescence of Bi/Er Co-doped fiber,” IEEE Photonics Technol. Lett. 29(1), 43–46 (2017).
[Crossref]

Cao, J.

L. Wang, J. Cao, Y. Lu, X. Li, S. Xu, Q. Zhang, Z. Yang, and M. Peng, “In situ instant generation of an ultrabroadband near-infrared emission center in bismuth-doped borosilicate glasses via a femtosecond laser,” Photonics Res. 7(3), 300–310 (2019).
[Crossref]

Chen, D.

Chen, N.

Chen, Z.

Deschamps, T.

Dianov, E.

Dianov, E. M.

S. V. Firstov, S. V. Alyshev, K. E. Riumkin, A. M. Khegai, A. V. Kharakhordin, M. A. Melkumov, and E. M. Dianov, “Laser-active fibers doped with Bismuth for a wavelength region of 1.6–1.8 µm,” IEEE J. Sel. Top. Quantum Electron. 24(5), 1–15 (2018).
[Crossref]

S. V. Firstov, S. V. Alyshev, A. V. Kharakhordin, K. E. Riumkin, and E. M. Dianov, “Laser-induced bleaching and thermo-stimulated recovery of luminescent centers in bismuth-doped optical fibers,” Opt. Mater. Express 7(9), 3422–3432 (2017).
[Crossref]

S. V. Firstov, S. V. Alyshev, E. G. Firstova, M. A. Melkumov, A. M. Khegay, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Dependence of the photobleaching on laser radiation wavelength in bismuth-doped germanosilicate fibers,” J. Lumin. 182(1), 87–90 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, A. V. E. Kharakhordin, S. V. Alyshev, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Gur’yanov, and E. M. Dianov, “Radiation-induced absorption in bismuth-doped germanosilicate fibres,” Quantum Electron. 47(12), 1120–1124 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, S. V. Alyshev, E. G. Firstova, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Guryanov, and E. M. Dianov, “Effect of gamma-irradiation on the optical properties of bismuth-doped germanosilicate fibers,” Opt. Mater. Express 6(10), 3303–3308 (2016).
[Crossref]

E. G. Firstova, I. A. Bufetov, V. F. Khopin, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, K. N. Nishchev, A. N. Gur’yanov, and E. M. Dianov, “Luminescence properties of IR-emitting bismuth centres in SiO2-based glasses in the UV to near-IR spectral region,” Quantum Electron. 45(1), 59–65 (2015).
[Crossref]

I. A. Bufetov, M. A. Melkumov, S. V. Firstov, K. E. Riumkin, A. V. Shubin, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Bi-Doped Optical Fibers and Fiber Lasers,” IEEE J. Sel. Top. Quantum Electron. 20(5), 111–125 (2014).
[Crossref]

K. E. Riumkin, M. A. Melkumov, I. A. Varfolomeev, A. V. Shubin, I. A. Bufetov, S. V. Firstov, V. F. Khopin, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Excited-state absorption in various bismuth-doped fibers,” Opt. Lett. 39(8), 2503–2506 (2014).
[Crossref]

E. M. Dianov, “Bismuth-doped optical fibres: A new breakthrough in near-IR lasing media,” Quantum Electron. 42(9), 754–761 (2012).
[Crossref]

S. V. Firstov, V. F. Khopin, I. A. Bufetov, E. G. Firstova, A. N. Guryanov, and E. M. Dianov, “Combined excitation-emission spectroscopy of bismuth active centers in optical fibers,” Opt. Express 19(20), 19551–19561 (2011).
[Crossref]

A. V. Kir’yanov, V. V. Dvoyrin, V. M. Mashinsky, N. N. Il’ichev, N. S. Kozlova, and E. M. Dianov, “Influence of electron irradiation on optical properties of Bismuth doped silica fibers,” Opt. Express 19(7), 6599–6608 (2011).
[Crossref]

I. A. Bufetov, M. A. Melkumov, S. V. Firstov, A. V. Shubin, S. L. Semenov, V. V. Vel’miskin, A. E. Levchenko, E. G. Firstova, and E. M. Dianov, “Optical gain and laser generation in bismuth-doped silica fibers free of other dopants,” Opt. Lett. 36(2), 166–168 (2011).
[Crossref]

V. V. Dvoyrin, A. V. Kir’yanov, V. M. Mashinsky, O. I. Medvedkov, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Absorption, gain, and laser action in bismuth-doped aluminosilicate optical fibers,” IEEE J. Quantum Electron. 46(2), 182–190 (2010).
[Crossref]

I. A. Bufetov, S. L. Semenov, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, and E. M. Dianov, “Optical properties of active bismuth centres in silica fibres containing no other dopants,” Quantum Electron. 40(7), 639–641 (2010).
[Crossref]

E. M. Dianov, V. Dvoyrin, V. M. Mashinsky, A. A. Umnikov, M. V. Yashkov, and A. N. Gur’yanov, “CW bismuth fibre laser,” Quantum Electron. 35(12), 1083–1084 (2005).
[Crossref]

Ding, M.

S. Wei, Y. Luo, M. Ding, F. Cai, G. Xiao, D. Fan, Q. Zhao, and G.-D. Peng, “Thermal effect on attenuation and luminescence of Bi/Er Co-doped fiber,” IEEE Photonics Technol. Lett. 29(1), 43–46 (2017).
[Crossref]

Dong, Y.

Dvoyrin, V.

E. M. Dianov, V. Dvoyrin, V. M. Mashinsky, A. A. Umnikov, M. V. Yashkov, and A. N. Gur’yanov, “CW bismuth fibre laser,” Quantum Electron. 35(12), 1083–1084 (2005).
[Crossref]

Dvoyrin, V. V.

A. V. Kir’yanov, V. V. Dvoyrin, V. M. Mashinsky, N. N. Il’ichev, N. S. Kozlova, and E. M. Dianov, “Influence of electron irradiation on optical properties of Bismuth doped silica fibers,” Opt. Express 19(7), 6599–6608 (2011).
[Crossref]

V. V. Dvoyrin, A. V. Kir’yanov, V. M. Mashinsky, O. I. Medvedkov, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Absorption, gain, and laser action in bismuth-doped aluminosilicate optical fibers,” IEEE J. Quantum Electron. 46(2), 182–190 (2010).
[Crossref]

Fan, D.

S. Wei, Y. Luo, M. Ding, F. Cai, G. Xiao, D. Fan, Q. Zhao, and G.-D. Peng, “Thermal effect on attenuation and luminescence of Bi/Er Co-doped fiber,” IEEE Photonics Technol. Lett. 29(1), 43–46 (2017).
[Crossref]

Firstov, S.

Firstov, S. V.

S. V. Firstov, S. V. Alyshev, K. E. Riumkin, A. M. Khegai, A. V. Kharakhordin, M. A. Melkumov, and E. M. Dianov, “Laser-active fibers doped with Bismuth for a wavelength region of 1.6–1.8 µm,” IEEE J. Sel. Top. Quantum Electron. 24(5), 1–15 (2018).
[Crossref]

S. V. Firstov, S. V. Alyshev, E. G. Firstova, M. A. Melkumov, A. M. Khegay, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Dependence of the photobleaching on laser radiation wavelength in bismuth-doped germanosilicate fibers,” J. Lumin. 182(1), 87–90 (2017).
[Crossref]

S. V. Firstov, S. V. Alyshev, A. V. Kharakhordin, K. E. Riumkin, and E. M. Dianov, “Laser-induced bleaching and thermo-stimulated recovery of luminescent centers in bismuth-doped optical fibers,” Opt. Mater. Express 7(9), 3422–3432 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, A. V. E. Kharakhordin, S. V. Alyshev, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Gur’yanov, and E. M. Dianov, “Radiation-induced absorption in bismuth-doped germanosilicate fibres,” Quantum Electron. 47(12), 1120–1124 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, S. V. Alyshev, E. G. Firstova, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Guryanov, and E. M. Dianov, “Effect of gamma-irradiation on the optical properties of bismuth-doped germanosilicate fibers,” Opt. Mater. Express 6(10), 3303–3308 (2016).
[Crossref]

E. G. Firstova, I. A. Bufetov, V. F. Khopin, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, K. N. Nishchev, A. N. Gur’yanov, and E. M. Dianov, “Luminescence properties of IR-emitting bismuth centres in SiO2-based glasses in the UV to near-IR spectral region,” Quantum Electron. 45(1), 59–65 (2015).
[Crossref]

I. A. Bufetov, M. A. Melkumov, S. V. Firstov, K. E. Riumkin, A. V. Shubin, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Bi-Doped Optical Fibers and Fiber Lasers,” IEEE J. Sel. Top. Quantum Electron. 20(5), 111–125 (2014).
[Crossref]

K. E. Riumkin, M. A. Melkumov, I. A. Varfolomeev, A. V. Shubin, I. A. Bufetov, S. V. Firstov, V. F. Khopin, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Excited-state absorption in various bismuth-doped fibers,” Opt. Lett. 39(8), 2503–2506 (2014).
[Crossref]

S. V. Firstov, V. F. Khopin, I. A. Bufetov, E. G. Firstova, A. N. Guryanov, and E. M. Dianov, “Combined excitation-emission spectroscopy of bismuth active centers in optical fibers,” Opt. Express 19(20), 19551–19561 (2011).
[Crossref]

I. A. Bufetov, M. A. Melkumov, S. V. Firstov, A. V. Shubin, S. L. Semenov, V. V. Vel’miskin, A. E. Levchenko, E. G. Firstova, and E. M. Dianov, “Optical gain and laser generation in bismuth-doped silica fibers free of other dopants,” Opt. Lett. 36(2), 166–168 (2011).
[Crossref]

I. A. Bufetov, S. L. Semenov, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, and E. M. Dianov, “Optical properties of active bismuth centres in silica fibres containing no other dopants,” Quantum Electron. 40(7), 639–641 (2010).
[Crossref]

Firstova, E. G.

S. V. Firstov, S. V. Alyshev, E. G. Firstova, M. A. Melkumov, A. M. Khegay, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Dependence of the photobleaching on laser radiation wavelength in bismuth-doped germanosilicate fibers,” J. Lumin. 182(1), 87–90 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, S. V. Alyshev, E. G. Firstova, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Guryanov, and E. M. Dianov, “Effect of gamma-irradiation on the optical properties of bismuth-doped germanosilicate fibers,” Opt. Mater. Express 6(10), 3303–3308 (2016).
[Crossref]

E. G. Firstova, I. A. Bufetov, V. F. Khopin, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, K. N. Nishchev, A. N. Gur’yanov, and E. M. Dianov, “Luminescence properties of IR-emitting bismuth centres in SiO2-based glasses in the UV to near-IR spectral region,” Quantum Electron. 45(1), 59–65 (2015).
[Crossref]

S. V. Firstov, V. F. Khopin, I. A. Bufetov, E. G. Firstova, A. N. Guryanov, and E. M. Dianov, “Combined excitation-emission spectroscopy of bismuth active centers in optical fibers,” Opt. Express 19(20), 19551–19561 (2011).
[Crossref]

I. A. Bufetov, M. A. Melkumov, S. V. Firstov, A. V. Shubin, S. L. Semenov, V. V. Vel’miskin, A. E. Levchenko, E. G. Firstova, and E. M. Dianov, “Optical gain and laser generation in bismuth-doped silica fibers free of other dopants,” Opt. Lett. 36(2), 166–168 (2011).
[Crossref]

Fujimoto, Y.

K. Murata, Y. Fujimoto, T. Kanabe, H. Fujita, and M. Nakatsuka, “Bi-doped SiO2 as a new laser material for an intense laser,” Fusion Eng. Des. 44(1-4), 437–439 (1999).
[Crossref]

Fujita, H.

K. Murata, Y. Fujimoto, T. Kanabe, H. Fujita, and M. Nakatsuka, “Bi-doped SiO2 as a new laser material for an intense laser,” Fusion Eng. Des. 44(1-4), 437–439 (1999).
[Crossref]

Gonnet, C.

Gur’yanov, A. N.

S. V. Firstov, V. F. Khopin, A. V. E. Kharakhordin, S. V. Alyshev, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Gur’yanov, and E. M. Dianov, “Radiation-induced absorption in bismuth-doped germanosilicate fibres,” Quantum Electron. 47(12), 1120–1124 (2017).
[Crossref]

E. G. Firstova, I. A. Bufetov, V. F. Khopin, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, K. N. Nishchev, A. N. Gur’yanov, and E. M. Dianov, “Luminescence properties of IR-emitting bismuth centres in SiO2-based glasses in the UV to near-IR spectral region,” Quantum Electron. 45(1), 59–65 (2015).
[Crossref]

E. M. Dianov, V. Dvoyrin, V. M. Mashinsky, A. A. Umnikov, M. V. Yashkov, and A. N. Gur’yanov, “CW bismuth fibre laser,” Quantum Electron. 35(12), 1083–1084 (2005).
[Crossref]

Guryanov, A.

Guryanov, A. N.

S. V. Firstov, S. V. Alyshev, E. G. Firstova, M. A. Melkumov, A. M. Khegay, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Dependence of the photobleaching on laser radiation wavelength in bismuth-doped germanosilicate fibers,” J. Lumin. 182(1), 87–90 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, S. V. Alyshev, E. G. Firstova, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Guryanov, and E. M. Dianov, “Effect of gamma-irradiation on the optical properties of bismuth-doped germanosilicate fibers,” Opt. Mater. Express 6(10), 3303–3308 (2016).
[Crossref]

I. A. Bufetov, M. A. Melkumov, S. V. Firstov, K. E. Riumkin, A. V. Shubin, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Bi-Doped Optical Fibers and Fiber Lasers,” IEEE J. Sel. Top. Quantum Electron. 20(5), 111–125 (2014).
[Crossref]

K. E. Riumkin, M. A. Melkumov, I. A. Varfolomeev, A. V. Shubin, I. A. Bufetov, S. V. Firstov, V. F. Khopin, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Excited-state absorption in various bismuth-doped fibers,” Opt. Lett. 39(8), 2503–2506 (2014).
[Crossref]

M. E. Likhachev, M. M. Bubnov, K. V. Zotov, A. L. Tomashuk, D. S. Lipatov, M. V. Yashkov, and A. N. Guryanov, “Radiation resistance of Er-doped silica fibers: Effect of host glass composition,” J. Lightwave Technol. 31(5), 749–755 (2013).
[Crossref]

S. V. Firstov, V. F. Khopin, I. A. Bufetov, E. G. Firstova, A. N. Guryanov, and E. M. Dianov, “Combined excitation-emission spectroscopy of bismuth active centers in optical fibers,” Opt. Express 19(20), 19551–19561 (2011).
[Crossref]

V. V. Dvoyrin, A. V. Kir’yanov, V. M. Mashinsky, O. I. Medvedkov, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Absorption, gain, and laser action in bismuth-doped aluminosilicate optical fibers,” IEEE J. Quantum Electron. 46(2), 182–190 (2010).
[Crossref]

Il’ichev, N. N.

Jetschke, S.

Kalita, M. P.

Kanabe, T.

K. Murata, Y. Fujimoto, T. Kanabe, H. Fujita, and M. Nakatsuka, “Bi-doped SiO2 as a new laser material for an intense laser,” Fusion Eng. Des. 44(1-4), 437–439 (1999).
[Crossref]

Kashaykin, P. F.

S. V. Firstov, V. F. Khopin, A. V. E. Kharakhordin, S. V. Alyshev, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Gur’yanov, and E. M. Dianov, “Radiation-induced absorption in bismuth-doped germanosilicate fibres,” Quantum Electron. 47(12), 1120–1124 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, S. V. Alyshev, E. G. Firstova, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Guryanov, and E. M. Dianov, “Effect of gamma-irradiation on the optical properties of bismuth-doped germanosilicate fibers,” Opt. Mater. Express 6(10), 3303–3308 (2016).
[Crossref]

Kharakhordin, A. V.

S. V. Firstov, S. V. Alyshev, K. E. Riumkin, A. M. Khegai, A. V. Kharakhordin, M. A. Melkumov, and E. M. Dianov, “Laser-active fibers doped with Bismuth for a wavelength region of 1.6–1.8 µm,” IEEE J. Sel. Top. Quantum Electron. 24(5), 1–15 (2018).
[Crossref]

S. V. Firstov, S. V. Alyshev, A. V. Kharakhordin, K. E. Riumkin, and E. M. Dianov, “Laser-induced bleaching and thermo-stimulated recovery of luminescent centers in bismuth-doped optical fibers,” Opt. Mater. Express 7(9), 3422–3432 (2017).
[Crossref]

Kharakhordin, A. V. E.

S. V. Firstov, V. F. Khopin, A. V. E. Kharakhordin, S. V. Alyshev, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Gur’yanov, and E. M. Dianov, “Radiation-induced absorption in bismuth-doped germanosilicate fibres,” Quantum Electron. 47(12), 1120–1124 (2017).
[Crossref]

Khegai, A. M.

S. V. Firstov, S. V. Alyshev, K. E. Riumkin, A. M. Khegai, A. V. Kharakhordin, M. A. Melkumov, and E. M. Dianov, “Laser-active fibers doped with Bismuth for a wavelength region of 1.6–1.8 µm,” IEEE J. Sel. Top. Quantum Electron. 24(5), 1–15 (2018).
[Crossref]

S. V. Firstov, V. F. Khopin, A. V. E. Kharakhordin, S. V. Alyshev, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Gur’yanov, and E. M. Dianov, “Radiation-induced absorption in bismuth-doped germanosilicate fibres,” Quantum Electron. 47(12), 1120–1124 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, S. V. Alyshev, E. G. Firstova, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Guryanov, and E. M. Dianov, “Effect of gamma-irradiation on the optical properties of bismuth-doped germanosilicate fibers,” Opt. Mater. Express 6(10), 3303–3308 (2016).
[Crossref]

Khegay, A. M.

S. V. Firstov, S. V. Alyshev, E. G. Firstova, M. A. Melkumov, A. M. Khegay, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Dependence of the photobleaching on laser radiation wavelength in bismuth-doped germanosilicate fibers,” J. Lumin. 182(1), 87–90 (2017).
[Crossref]

Khopin, V.

Khopin, V. F.

S. V. Firstov, S. V. Alyshev, E. G. Firstova, M. A. Melkumov, A. M. Khegay, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Dependence of the photobleaching on laser radiation wavelength in bismuth-doped germanosilicate fibers,” J. Lumin. 182(1), 87–90 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, A. V. E. Kharakhordin, S. V. Alyshev, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Gur’yanov, and E. M. Dianov, “Radiation-induced absorption in bismuth-doped germanosilicate fibres,” Quantum Electron. 47(12), 1120–1124 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, S. V. Alyshev, E. G. Firstova, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Guryanov, and E. M. Dianov, “Effect of gamma-irradiation on the optical properties of bismuth-doped germanosilicate fibers,” Opt. Mater. Express 6(10), 3303–3308 (2016).
[Crossref]

E. G. Firstova, I. A. Bufetov, V. F. Khopin, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, K. N. Nishchev, A. N. Gur’yanov, and E. M. Dianov, “Luminescence properties of IR-emitting bismuth centres in SiO2-based glasses in the UV to near-IR spectral region,” Quantum Electron. 45(1), 59–65 (2015).
[Crossref]

I. A. Bufetov, M. A. Melkumov, S. V. Firstov, K. E. Riumkin, A. V. Shubin, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Bi-Doped Optical Fibers and Fiber Lasers,” IEEE J. Sel. Top. Quantum Electron. 20(5), 111–125 (2014).
[Crossref]

K. E. Riumkin, M. A. Melkumov, I. A. Varfolomeev, A. V. Shubin, I. A. Bufetov, S. V. Firstov, V. F. Khopin, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Excited-state absorption in various bismuth-doped fibers,” Opt. Lett. 39(8), 2503–2506 (2014).
[Crossref]

S. V. Firstov, V. F. Khopin, I. A. Bufetov, E. G. Firstova, A. N. Guryanov, and E. M. Dianov, “Combined excitation-emission spectroscopy of bismuth active centers in optical fibers,” Opt. Express 19(20), 19551–19561 (2011).
[Crossref]

Kir’yanov, A. V.

A. V. Kir’yanov, V. V. Dvoyrin, V. M. Mashinsky, N. N. Il’ichev, N. S. Kozlova, and E. M. Dianov, “Influence of electron irradiation on optical properties of Bismuth doped silica fibers,” Opt. Express 19(7), 6599–6608 (2011).
[Crossref]

V. V. Dvoyrin, A. V. Kir’yanov, V. M. Mashinsky, O. I. Medvedkov, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Absorption, gain, and laser action in bismuth-doped aluminosilicate optical fibers,” IEEE J. Quantum Electron. 46(2), 182–190 (2010).
[Crossref]

Kirchhof, J.

Kozlova, N. S.

Leich, M.

Levchenko, A. E.

Li, X.

L. Wang, J. Cao, Y. Lu, X. Li, S. Xu, Q. Zhang, Z. Yang, and M. Peng, “In situ instant generation of an ultrabroadband near-infrared emission center in bismuth-doped borosilicate glasses via a femtosecond laser,” Photonics Res. 7(3), 300–310 (2019).
[Crossref]

Likhachev, M. E.

Lipatov, D. S.

Liu, W.

Lu, Y.

L. Wang, J. Cao, Y. Lu, X. Li, S. Xu, Q. Zhang, Z. Yang, and M. Peng, “In situ instant generation of an ultrabroadband near-infrared emission center in bismuth-doped borosilicate glasses via a femtosecond laser,” Photonics Res. 7(3), 300–310 (2019).
[Crossref]

Luo, Y.

S. Wei, Y. Luo, M. Ding, F. Cai, G. Xiao, D. Fan, Q. Zhao, and G.-D. Peng, “Thermal effect on attenuation and luminescence of Bi/Er Co-doped fiber,” IEEE Photonics Technol. Lett. 29(1), 43–46 (2017).
[Crossref]

J. Wen, W. Liu, Y. Dong, Y. Luo, G.-D. Peng, N. Chen, F. Pang, Z. Chen, and T. Wang, “Radiation-induced photoluminescence enhancement of Bi/Al-codoped silica optical fibers via atomic layer deposition,” Opt. Express 23(22), 29004–29013 (2015).
[Crossref]

Mashinsky, V. M.

A. V. Kir’yanov, V. V. Dvoyrin, V. M. Mashinsky, N. N. Il’ichev, N. S. Kozlova, and E. M. Dianov, “Influence of electron irradiation on optical properties of Bismuth doped silica fibers,” Opt. Express 19(7), 6599–6608 (2011).
[Crossref]

V. V. Dvoyrin, A. V. Kir’yanov, V. M. Mashinsky, O. I. Medvedkov, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Absorption, gain, and laser action in bismuth-doped aluminosilicate optical fibers,” IEEE J. Quantum Electron. 46(2), 182–190 (2010).
[Crossref]

E. M. Dianov, V. Dvoyrin, V. M. Mashinsky, A. A. Umnikov, M. V. Yashkov, and A. N. Gur’yanov, “CW bismuth fibre laser,” Quantum Electron. 35(12), 1083–1084 (2005).
[Crossref]

Medvedkov, O. I.

V. V. Dvoyrin, A. V. Kir’yanov, V. M. Mashinsky, O. I. Medvedkov, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Absorption, gain, and laser action in bismuth-doped aluminosilicate optical fibers,” IEEE J. Quantum Electron. 46(2), 182–190 (2010).
[Crossref]

Melkumov, M.

Melkumov, M. A.

S. V. Firstov, S. V. Alyshev, K. E. Riumkin, A. M. Khegai, A. V. Kharakhordin, M. A. Melkumov, and E. M. Dianov, “Laser-active fibers doped with Bismuth for a wavelength region of 1.6–1.8 µm,” IEEE J. Sel. Top. Quantum Electron. 24(5), 1–15 (2018).
[Crossref]

S. V. Firstov, S. V. Alyshev, E. G. Firstova, M. A. Melkumov, A. M. Khegay, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Dependence of the photobleaching on laser radiation wavelength in bismuth-doped germanosilicate fibers,” J. Lumin. 182(1), 87–90 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, A. V. E. Kharakhordin, S. V. Alyshev, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Gur’yanov, and E. M. Dianov, “Radiation-induced absorption in bismuth-doped germanosilicate fibres,” Quantum Electron. 47(12), 1120–1124 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, S. V. Alyshev, E. G. Firstova, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Guryanov, and E. M. Dianov, “Effect of gamma-irradiation on the optical properties of bismuth-doped germanosilicate fibers,” Opt. Mater. Express 6(10), 3303–3308 (2016).
[Crossref]

I. A. Bufetov, M. A. Melkumov, S. V. Firstov, K. E. Riumkin, A. V. Shubin, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Bi-Doped Optical Fibers and Fiber Lasers,” IEEE J. Sel. Top. Quantum Electron. 20(5), 111–125 (2014).
[Crossref]

K. E. Riumkin, M. A. Melkumov, I. A. Varfolomeev, A. V. Shubin, I. A. Bufetov, S. V. Firstov, V. F. Khopin, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Excited-state absorption in various bismuth-doped fibers,” Opt. Lett. 39(8), 2503–2506 (2014).
[Crossref]

I. A. Bufetov, M. A. Melkumov, S. V. Firstov, A. V. Shubin, S. L. Semenov, V. V. Vel’miskin, A. E. Levchenko, E. G. Firstova, and E. M. Dianov, “Optical gain and laser generation in bismuth-doped silica fibers free of other dopants,” Opt. Lett. 36(2), 166–168 (2011).
[Crossref]

Meng, X.

Murata, K.

K. Murata, Y. Fujimoto, T. Kanabe, H. Fujita, and M. Nakatsuka, “Bi-doped SiO2 as a new laser material for an intense laser,” Fusion Eng. Des. 44(1-4), 437–439 (1999).
[Crossref]

Nakatsuka, M.

K. Murata, Y. Fujimoto, T. Kanabe, H. Fujita, and M. Nakatsuka, “Bi-doped SiO2 as a new laser material for an intense laser,” Fusion Eng. Des. 44(1-4), 437–439 (1999).
[Crossref]

Nishchev, K. N.

E. G. Firstova, I. A. Bufetov, V. F. Khopin, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, K. N. Nishchev, A. N. Gur’yanov, and E. M. Dianov, “Luminescence properties of IR-emitting bismuth centres in SiO2-based glasses in the UV to near-IR spectral region,” Quantum Electron. 45(1), 59–65 (2015).
[Crossref]

Ollier, N.

Pang, F.

Peng, G.-D.

S. Wei, Y. Luo, M. Ding, F. Cai, G. Xiao, D. Fan, Q. Zhao, and G.-D. Peng, “Thermal effect on attenuation and luminescence of Bi/Er Co-doped fiber,” IEEE Photonics Technol. Lett. 29(1), 43–46 (2017).
[Crossref]

J. Wen, W. Liu, Y. Dong, Y. Luo, G.-D. Peng, N. Chen, F. Pang, Z. Chen, and T. Wang, “Radiation-induced photoluminescence enhancement of Bi/Al-codoped silica optical fibers via atomic layer deposition,” Opt. Express 23(22), 29004–29013 (2015).
[Crossref]

Peng, M.

L. Wang, J. Cao, Y. Lu, X. Li, S. Xu, Q. Zhang, Z. Yang, and M. Peng, “In situ instant generation of an ultrabroadband near-infrared emission center in bismuth-doped borosilicate glasses via a femtosecond laser,” Photonics Res. 7(3), 300–310 (2019).
[Crossref]

M. Peng, J. Qiu, D. Chen, X. Meng, and C. Zhu, “Superbroadband 1310 nm emission from bismuth and tantalum codoped germanium oxide glasses,” Opt. Lett. 30(18), 2433–2435 (2005).
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Qiu, J.

Reichel, V.

Riumkin, K. E.

S. V. Firstov, S. V. Alyshev, K. E. Riumkin, A. M. Khegai, A. V. Kharakhordin, M. A. Melkumov, and E. M. Dianov, “Laser-active fibers doped with Bismuth for a wavelength region of 1.6–1.8 µm,” IEEE J. Sel. Top. Quantum Electron. 24(5), 1–15 (2018).
[Crossref]

S. V. Firstov, S. V. Alyshev, A. V. Kharakhordin, K. E. Riumkin, and E. M. Dianov, “Laser-induced bleaching and thermo-stimulated recovery of luminescent centers in bismuth-doped optical fibers,” Opt. Mater. Express 7(9), 3422–3432 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, A. V. E. Kharakhordin, S. V. Alyshev, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Gur’yanov, and E. M. Dianov, “Radiation-induced absorption in bismuth-doped germanosilicate fibres,” Quantum Electron. 47(12), 1120–1124 (2017).
[Crossref]

S. V. Firstov, V. F. Khopin, S. V. Alyshev, E. G. Firstova, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Guryanov, and E. M. Dianov, “Effect of gamma-irradiation on the optical properties of bismuth-doped germanosilicate fibers,” Opt. Mater. Express 6(10), 3303–3308 (2016).
[Crossref]

I. A. Bufetov, M. A. Melkumov, S. V. Firstov, K. E. Riumkin, A. V. Shubin, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Bi-Doped Optical Fibers and Fiber Lasers,” IEEE J. Sel. Top. Quantum Electron. 20(5), 111–125 (2014).
[Crossref]

K. E. Riumkin, M. A. Melkumov, I. A. Varfolomeev, A. V. Shubin, I. A. Bufetov, S. V. Firstov, V. F. Khopin, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Excited-state absorption in various bismuth-doped fibers,” Opt. Lett. 39(8), 2503–2506 (2014).
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Röpke, U.

Sahu, J.

Sandoval-Romero, G.

Semenov, S. L.

I. A. Bufetov, M. A. Melkumov, S. V. Firstov, A. V. Shubin, S. L. Semenov, V. V. Vel’miskin, A. E. Levchenko, E. G. Firstova, and E. M. Dianov, “Optical gain and laser generation in bismuth-doped silica fibers free of other dopants,” Opt. Lett. 36(2), 166–168 (2011).
[Crossref]

I. A. Bufetov, S. L. Semenov, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, and E. M. Dianov, “Optical properties of active bismuth centres in silica fibres containing no other dopants,” Quantum Electron. 40(7), 639–641 (2010).
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Shi, X.

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Suo, X.

X. Suo, Y. Yang, M. Yang, X. Shi, and S. Zhao, “High stability and radiation-resistance broadband fiber-optic source,” in Advanced Sensor Systems and Applications IV (International Society for Optics and Photonics2010), p. 78533Z.

Tomashuk, A. L.

Umnikov, A. A.

K. E. Riumkin, M. A. Melkumov, I. A. Varfolomeev, A. V. Shubin, I. A. Bufetov, S. V. Firstov, V. F. Khopin, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Excited-state absorption in various bismuth-doped fibers,” Opt. Lett. 39(8), 2503–2506 (2014).
[Crossref]

V. V. Dvoyrin, A. V. Kir’yanov, V. M. Mashinsky, O. I. Medvedkov, A. A. Umnikov, A. N. Guryanov, and E. M. Dianov, “Absorption, gain, and laser action in bismuth-doped aluminosilicate optical fibers,” IEEE J. Quantum Electron. 46(2), 182–190 (2010).
[Crossref]

E. M. Dianov, V. Dvoyrin, V. M. Mashinsky, A. A. Umnikov, M. V. Yashkov, and A. N. Gur’yanov, “CW bismuth fibre laser,” Quantum Electron. 35(12), 1083–1084 (2005).
[Crossref]

Unger, S.

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I. A. Bufetov, M. A. Melkumov, S. V. Firstov, A. V. Shubin, S. L. Semenov, V. V. Vel’miskin, A. E. Levchenko, E. G. Firstova, and E. M. Dianov, “Optical gain and laser generation in bismuth-doped silica fibers free of other dopants,” Opt. Lett. 36(2), 166–168 (2011).
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L. Wang, J. Cao, Y. Lu, X. Li, S. Xu, Q. Zhang, Z. Yang, and M. Peng, “In situ instant generation of an ultrabroadband near-infrared emission center in bismuth-doped borosilicate glasses via a femtosecond laser,” Photonics Res. 7(3), 300–310 (2019).
[Crossref]

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[Crossref]

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S. Wei, Y. Luo, M. Ding, F. Cai, G. Xiao, D. Fan, Q. Zhao, and G.-D. Peng, “Thermal effect on attenuation and luminescence of Bi/Er Co-doped fiber,” IEEE Photonics Technol. Lett. 29(1), 43–46 (2017).
[Crossref]

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L. Wang, J. Cao, Y. Lu, X. Li, S. Xu, Q. Zhang, Z. Yang, and M. Peng, “In situ instant generation of an ultrabroadband near-infrared emission center in bismuth-doped borosilicate glasses via a femtosecond laser,” Photonics Res. 7(3), 300–310 (2019).
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X. Suo, Y. Yang, M. Yang, X. Shi, and S. Zhao, “High stability and radiation-resistance broadband fiber-optic source,” in Advanced Sensor Systems and Applications IV (International Society for Optics and Photonics2010), p. 78533Z.

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X. Suo, Y. Yang, M. Yang, X. Shi, and S. Zhao, “High stability and radiation-resistance broadband fiber-optic source,” in Advanced Sensor Systems and Applications IV (International Society for Optics and Photonics2010), p. 78533Z.

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L. Wang, J. Cao, Y. Lu, X. Li, S. Xu, Q. Zhang, Z. Yang, and M. Peng, “In situ instant generation of an ultrabroadband near-infrared emission center in bismuth-doped borosilicate glasses via a femtosecond laser,” Photonics Res. 7(3), 300–310 (2019).
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Yoo, S.

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L. Wang, J. Cao, Y. Lu, X. Li, S. Xu, Q. Zhang, Z. Yang, and M. Peng, “In situ instant generation of an ultrabroadband near-infrared emission center in bismuth-doped borosilicate glasses via a femtosecond laser,” Photonics Res. 7(3), 300–310 (2019).
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S. Wei, Y. Luo, M. Ding, F. Cai, G. Xiao, D. Fan, Q. Zhao, and G.-D. Peng, “Thermal effect on attenuation and luminescence of Bi/Er Co-doped fiber,” IEEE Photonics Technol. Lett. 29(1), 43–46 (2017).
[Crossref]

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X. Suo, Y. Yang, M. Yang, X. Shi, and S. Zhao, “High stability and radiation-resistance broadband fiber-optic source,” in Advanced Sensor Systems and Applications IV (International Society for Optics and Photonics2010), p. 78533Z.

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S. V. Firstov, S. V. Alyshev, E. G. Firstova, M. A. Melkumov, A. M. Khegay, V. F. Khopin, A. N. Guryanov, and E. M. Dianov, “Dependence of the photobleaching on laser radiation wavelength in bismuth-doped germanosilicate fibers,” J. Lumin. 182(1), 87–90 (2017).
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L. Wang, J. Cao, Y. Lu, X. Li, S. Xu, Q. Zhang, Z. Yang, and M. Peng, “In situ instant generation of an ultrabroadband near-infrared emission center in bismuth-doped borosilicate glasses via a femtosecond laser,” Photonics Res. 7(3), 300–310 (2019).
[Crossref]

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E. G. Firstova, I. A. Bufetov, V. F. Khopin, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, K. N. Nishchev, A. N. Gur’yanov, and E. M. Dianov, “Luminescence properties of IR-emitting bismuth centres in SiO2-based glasses in the UV to near-IR spectral region,” Quantum Electron. 45(1), 59–65 (2015).
[Crossref]

I. A. Bufetov, S. L. Semenov, V. V. Vel’miskin, S. V. Firstov, G. A. Bufetova, and E. M. Dianov, “Optical properties of active bismuth centres in silica fibres containing no other dopants,” Quantum Electron. 40(7), 639–641 (2010).
[Crossref]

E. M. Dianov, V. Dvoyrin, V. M. Mashinsky, A. A. Umnikov, M. V. Yashkov, and A. N. Gur’yanov, “CW bismuth fibre laser,” Quantum Electron. 35(12), 1083–1084 (2005).
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S. V. Firstov, V. F. Khopin, A. V. E. Kharakhordin, S. V. Alyshev, K. E. Riumkin, M. A. Melkumov, A. M. Khegai, P. F. Kashaykin, A. N. Gur’yanov, and E. M. Dianov, “Radiation-induced absorption in bismuth-doped germanosilicate fibres,” Quantum Electron. 47(12), 1120–1124 (2017).
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Other (1)

X. Suo, Y. Yang, M. Yang, X. Shi, and S. Zhao, “High stability and radiation-resistance broadband fiber-optic source,” in Advanced Sensor Systems and Applications IV (International Society for Optics and Photonics2010), p. 78533Z.

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Figures (7)

Fig. 1.
Fig. 1. Refractive index profile of the pristine BEDF. The inset shows the concentration distribution of dopants across the fiber core region.
Fig. 2.
Fig. 2. Insertion absorption spectra of the FUTs before and after electron irradiation in the range 500-1600 nm. Inset: the enlarged part of the absorption spectra from 500 to 750 nm for all the FUTs.
Fig. 3.
Fig. 3. RIA spectra in the range 700-1600 nm of BEDFs irradiated to doses of 5-140 kGy. Inset: the RIA spectra of the BEDF and EDF irradiated to 140 kGy and the RIA difference between them.
Fig. 4.
Fig. 4. (a) Pump absorption of the BEDFs before and after irradiation at λex = 980 nm. (b) Unsaturable loss, saturable loss and figure of merit as a function of radiation dose at 830 nm.
Fig. 5.
Fig. 5. Luminescence spectra of the BEDFs irradiated to doses of 5-140 kGy upon excitation at (a) 980 nm and (b) 830 nm.
Fig. 6.
Fig. 6. On-off gain spectra of the FUTs before and after electron radiation (5-140 kGy) under 980 and 830 nm pumping, respectively (a, c) and (b, d) The on-off gain and net gain values at 1100 and 1536 nm versus radiation dose under 980 and 830 nm pumping, respectively.
Fig. 7.
Fig. 7. (a) Evolution of luminescence at 1190 nm of pristine and irradiated (140 kGy) BEDFs during heating and cooling. (b) Heat induced loss ΔαT at 1300 nm of pristine and irradiated fibers versus temperature. Inset: heat induced loss spectra of pristine and irradiated fibers after heating and subsequent cooling to room temperature.

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