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11 October 2024 L-band narrow linewidth Brillouin random fiber laser via distributed Rayleigh scattering in optical fibers
Xu Guo, Liang Zhang, Wenzhi Wang, Tianle Chu, Qin Xie, Jiating Liu, Songhua Rao, Mengshi Zhu, Heming Wei, Fufei Pang
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Proceedings Volume 13287, Nineteenth National Conference on Laser Technology and Optoelectronics; 132870S (2024) https://doi.org/10.1117/12.3038918
Event: Nineteenth National Conference on Laser Technology and Optoelectronics, 2024, Shanghai, China
Abstract
We proposed and experimentally demonstrated a tunable L-band narrow-linewidth Brillouin random fiber laser (BRFL) in a half-open ring cavity with Brillouin gain medium of 10-km single mode fiber (SMF) as well as distributed Rayleigh feedback provided by another 20-km SMF. With a low laser threshold of 6.8mW, the proposed laser can realize cavity-mode-free lasing resonance at a wavelength of 1576.08nm, indicating good single-frequency lasing operation. Compared with the Brillouin pump, the frequency noise (FN) of the proposed laser is significantly suppressed by around 30dB, benefiting from randomly distributed Rayleigh scattering along SMF. An ultra-narrow laser linewidth of 400.8Hz is also obtained with a pump/Stokes laser linewidth compression ratio of 87.5, which coincides with theoretical prediction. When the wavelength of the proposed laser is tuned from 1568.08nm to 1576.08nm, sub-kHz random lasers with cavity mode free lasing resonance achieves high optical signal-to-noise ratio (ONSR) operation. The proposed laser source with good tunability has great potentials for practical applications in future advanced optical communication and sensing.
(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.
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Xu Guo, Liang Zhang, Wenzhi Wang, Tianle Chu, Qin Xie, Jiating Liu, Songhua Rao, Mengshi Zhu, Heming Wei, and Fufei Pang "L-band narrow linewidth Brillouin random fiber laser via distributed Rayleigh scattering in optical fibers", Proc. SPIE 13287, Nineteenth National Conference on Laser Technology and Optoelectronics, 132870S (11 October 2024); https://doi.org/10.1117/12.3038918
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KEYWORDS
Fiber lasers
L band
Laser frequency
Optical fibers
Rayleigh scattering
Single mode fibers
Random lasers
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