Abstract

As it was shown in previous research (see e.g. [1]), Yb:LuAG exhibits comparable parameters to Yb:YAG, with the exception of 20% larger stimulated emission cross-section. Consequently, higher gain and higher optimal out-coupling losses may be expected for Yb:LuAG lasers operating in cw as well as in Q-switching regimes. The aim of this work was to show the potential of Yb:LuAG crystal as a gain medium for simple, passively cooled, Q-switched oscillator operating in room temperatur. The side-pumping configuration with 2D, fast-axis-collimated LD stack delivering up to 0.68 J in 0.8-ms duration pump pulse at 970-nm wavelength was applied for experiments. The pump beam was tightly focused by means of a cylindrical lens to the caustics of sizes: 0.3-mm high in Y-direction, 12-mm wide in Z-direction and 0.9-mm deep in X-direction with 18 J/cm2 pump energy density onto pump-entrance facet of a slab (see Fig. 1). Combined effects of reabsorption loss aperture formed by tightly focused beam and the cavity (rear mirror has 0.5-m radius of curvature) result in an operation in a near-fundamental mode. We examined the Yb:LuAG crystals with different dopant levels. Higher Yb concentration results in self-lasing via Amplified Spontaneous Emission. Therefore, we decided to apply lower-doped media in passive Q-switching experiments. The best results were demonstrated for 9.35 at.%, 3×3×12 mm3 Yb:LuAG slab.

© 2015 IEEE

PDF Article
More Like This
Optimization of diode-side-pumped, passively Q-switched Yb:LuAG slab laser

Mateusz Kaskow, Jan K. Jabczynski, Waldemar Zendzian, Jan Sulc, Michal Nemec, and Helena Jelinkova
ATh2A.15 Advanced Solid State Lasers (ASSL) 2015

Passive Q-switching operation in self-adaptive, diode-side-pumped, Nd:YAG slab laser

W. Zendzian, M. Kaskow, L. Gorajek, J. Kwiatkowski, K. Kopczynski, and J.K. Jabczynski
ATu3A.53 Advanced Solid State Lasers (ASSL) 2013

New method of energy control in passively Q-switched diode-end-pumped lasers

J. K. Jabczynski, M. Kaskow, J. Sulc, H. Jelinkova, W. Zendzian, and K. Kopczyński
ATu2A.36 Advanced Solid State Lasers (ASSL) 2014

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription