Multi-wavelength Bismuth-doped fiber laser in 1.3 µm based on a compact two-mode fiber filter

Ahmad, H., Kamaruddin, N.H., Aidit, S.N., Samion, M.Z., Zaini, M.K.A., Bayang, L., Wang, Yu, Wang, Siyi, Sahu, J.K. and Yasin, M. (2021) Multi-wavelength Bismuth-doped fiber laser in 1.3 µm based on a compact two-mode fiber filter. Optics and Laser Technology, 144, [107390]. (doi:10.1016/j.optlastec.2021.107390).

Abstract

In this work, a multi-wavelength Bismuth-doped fiber laser (MWLBDFL) operating in the 1.3 µm wavelength region is presented and experimentally demonstrated. The MWLBDFL leveraged on a 60 m Bismuth-doped fiber as an active gain medium, a compact two-mode fiber filter (TMFF) as a comb filter and a 2 km single-mode fiber section to induce four-wave mixing in the system. By optimising the polarization controller, the MWLBDFL generated 18 stable lasing output channels within 10 dB from the highest lasing line and a reasonably flat spectrum over a range of 11 nm. The stability of the MWLBDFL tested for a 150-minute duration showed a peak power fluctuation of less than 1 dB with a negligible wavelength drift. The extinction ratio of the TMFF was approximately 8.6 dB while the highest and lowest optical-signal-to-noise ratios (OSNRs) of the MWLBDFL were ~ 55 dB and ~ 50 dB, respectively. To the best of the author's knowledge, the proposed MWLBDFL demonstrates the highest number of output channels compared to other MWLs operating in the same wavelength region.

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Contributors

Author: Siyi Wang

Author: J.K. Sahu

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