饱和吸收
材料科学
光纤激光器
光学
布里渊散射
纵向模式
纤维
保偏光纤
光纤
光电子学
激光器
光纤传感器
物理
复合材料
作者
Longfei Li,Zhongan Zhao,Qixing Yu,Liwen Sheng,Zhenxu Bai
摘要
A single-longitudinal mode (SLM) Brillouin fiber laser is demonstrated, which leverages stimulated Brillouin scattering (SBS) in the fiber to achieve linewidth compression. The Brillouin ring cavity has a substantial length of 1 km, resulting in a longitudinal mode spacing that is significantly smaller than the width of the Brillouin gain spectrum. This leads to a multi-longitudinal mode (MLM) state for the output laser. To achieve SLM output, mode selection filters such as fiber ring and reflective saturable absorber (RSA) are introduced. The proposed laser has a threshold of ~28 mW, with an output linewidth compressed from 100 kHz to 20.21 kHz using delayed self-heterodyne interferometry (DSHI). The optical signal-to-noise ratio (OSNR) improved from 58.2 dB to 80.8 dB, and the maximum laser conversion efficiency reached 26%.
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