Brillouin fiber swept laser based on distributed Rayleigh scattering in optical fibers

Xu Guo; Zepeng Zhong; Mengshi Zhu; Heming Wei; Liang Zhang; Fufei Pang; Tingyun Wang

doi:10.1117/12.3022688

18 March 2024 Brillouin fiber swept laser based on distributed Rayleigh scattering in optical fibers

Xu Guo, Zepeng Zhong, Mengshi Zhu, Heming Wei, Liang Zhang, Fufei Pang, Tingyun Wang

Proceedings Volume 13104, Advanced Fiber Laser Conference (AFL2023); 131041W (2024) https://doi.org/10.1117/12.3022688
Event: Advanced Fiber Laser Conference (AFL2023), 2023, Shenzhen, China

Abstract

We reported a narrow-linewidth Brillouin fiber swept laser in a half-open ring cavity based on Brillouin gain medium of a 100-m high nonlinearity fiber (HNLF) as well as distributed Rayleigh random feedback from 1-km single mode fiber (SMF). Thanks to Rayleigh-assistant random lasing resonance, the proposed Stokes laser realizes SLM frequency sweeping radiation as a swept Brillouin pump laser source launched into the random laser cavity. The static linewidth and frequency noise of the Brillouin fiber swept laser is also characterized, which exhibits a linewidth narrowing by over 100 times as well as ~18 dB frequency noise (FN) suppression compared with the pump laser. Results show that the output power and flatness of the Stokes laser were dependent on the sweeping speed of the pump. Demodulated by an unbalanced Mach-Zender interferometer (UMZI), a continuous sweeping range of ~126.33 MHz was obtained during an observation time window of 100 us.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Xu Guo, Zepeng Zhong, Mengshi Zhu, Heming Wei, Liang Zhang, Fufei Pang, and Tingyun Wang "Brillouin fiber swept laser based on distributed Rayleigh scattering in optical fibers", Proc. SPIE 13104, Advanced Fiber Laser Conference (AFL2023), 131041W (18 March 2024); https://doi.org/10.1117/12.3022688

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KEYWORDS

Fiber lasers

Laser frequency

Laser scattering

Rayleigh scattering

Laser sources

Optical fibers

Sensing systems

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