Abstract

In this article, we report high-speed multi-band direct-detection (DD) transmission over a hollow-core nested antiresonant nodeless fiber (NANF). Thanks to the ultrawide bandwidth of the NANF, we demonstrate dual-band transmission across the O- and C-bands over a ∼1-km length of a hollow-core fiber for the first time. Eight wavelength-division multiplexed (WDM) channels were transmitted using 100-Gb/s/λ Nyquist 4-ary pulse-amplitude modulation (PAM4) signals, which to the best of our knowledge, is the highest aggregate capacity ever transmitted in a DD hollow-core fiber-based transmission system. Optical pre-amplification was adopted for signal reception in both bands, achieved using an in-house built bismuth-doped optical fibre amplifier (BDFA) and a commercial erbium-doped fiber amplifier (EDFA) in the O- and C-band, respectively. We further demonstrate beyond 100-Gb/s/λ adaptively-loaded discrete multitone (DMT) transmission over the S+C+L-bands using the same NANF, without the use of optical amplification. Our experiments show that apart from fiber loss, the use of the NANF did not introduce any additional transmission penalties. The demonstrated results validate the ultrawide bandwidth and excellent modal purity of the fabricated NANF, which allow beyond 100-Gb/s/λ penalty-free transmission over multiple bands, highlighting the potential of this fiber technology for high-speed short- to intermediate-reach applications.

Experimental demonstration of single-span 100-km O-band 4×50-Gb/s CWDM direct-detection transmission

Yang Hong, Natsupa Taengnoi, Kyle R. H. Bottrill, Naresh K. Thipparapu, Yu Wang, Jayanta K. Sahu, David J. Richardson, and Periklis Petropoulos
Opt. Express 30(18) 32189-32203 (2022)

Experimental investigation of BDFA-based O-band direct-detection transmission using an optical recirculating loop

Yang Hong, Natsupa Taengnoi, Kyle R. H. Bottrill, Yu Wang, Jayanta K. Sahu, Periklis Petropoulos, and David J. Richardson
Opt. Express 31(7) 10978-10990 (2023)

Numerical and experimental study on the impact of chromatic dispersion on O-band direct-detection transmission

Yang Hong, Kyle R. H. Bottrill, Natsupa Taengnoi, Naresh K. Thipparapu, Yu Wang, Jayanta K. Sahu, David J. Richardson, and Periklis Petropoulos
Appl. Opt. 60(15) 4383-4390 (2021)

Orbital-angular-momentum mode-group multiplexed transmission over a graded-index ring-core fiber based on receive diversity and maximal ratio combining

Junwei Zhang, Guoxuan Zhu, Jie Liu, Xiong Wu, Jiangbo Zhu, Cheng Du, Wenyong Luo, Yujie Chen, and Siyuan Yu
Opt. Express 26(4) 4243-4257 (2018)

Ultrawide bandwidth single-mode polarization beam splitter based on dual-hollow-core antiresonant fiber

Haoqiang Jia, Xin Wang, Tongtong Zhao, Zijuan Tang, Zhenggang Lian, Shuqin Lou, and Xinzhi Sheng
Appl. Opt. 60(31) 9781-9789 (2021)