Impact of external optical feedback on the beat notes of dual-polarization fiber lasers

• 作 者: 余贶琭 程凌浩 劳奕琴 李云波 关柏鸥 吴重庆 赵耀
• 机 构: Institute of Information Science,Beijing Jiaotong University,Guangdong Provincial Key Laboratory of
• 出 处: Chinese Optics Letters
• 发表日期: 2017年07期
• 关键词: notes suppress lowering lasing length stabilization reflector fitted disturbance

We present a theoretical analysis and an experimental study of the impacts of external optical feedback on dualfrequency fiber lasers. The external optical feedback can effectively suppress the phase noise of the beat notes of dual-frequency fiber lasers, provided some requirements are satisfied. The polarization of the optical feedback is important for the fiber laser’s stability, and it can also tune the beat note frequency. A side effect of external optical feedback, as demonstrated in the experiments, is lowering the sensitivity of the dual-frequency fiber laserbased sensors, although such degradation is not obvious.

We present a theoretical analysis and an experimental study of the impacts of external optical feedback on dualfrequency fiber lasers. The external optical feedback on dualfrequency fiber lasers. The polarization of light of the beat notes of dual-frequency fiber lasers, provided some requirements are satisfied. The polarization of the optical feedback is important for the fiber laser’s stability, and it can also tune the beat note frequency. A side effect of external optical feedback, as demonstrated in the experiments, is lowering the sensitivity of the dual-frequency fiber laserbased sensors, such degradation is not obvious.