An external cavity wavelength-fiber ring laser (ECWTFL) based on a semiconductor optical amplifier and a combined wavelength scanning filter in the Littrow configuration is proposed and experimentally demonstrated. With the benefit of the combination of an external cavity wavelength filter and a Lyot filter, the laser achieves a single-mode narrow linewidth output with a linewidth of 1.75 kHz. The wavelength tuning range reaches 133 nm, covering the entire S + C band. The proposed ECWTFL is used for demodulation of a fiber EFPI sensor; the result shows that the proposed ECWTFL has the ability to demodulate the small cavity-length FPI sensor.

中文翻译：

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单纵模S+C波段波长可调谐光纤激光器

提出并通过实验证明了一种基于半导体光放大器和利特罗配置的组合波长扫描滤波器的外腔波长光纤环形激光器（ECWTFL）。借助外腔波长滤波器和Lyot滤波器的组合，激光器实现了线宽为1.75 kHz的单模窄线宽输出。波长调谐范围达到133 nm，覆盖整个S+C波段。所提出的 ECWTFL 用于光纤 EFPI 传感器的解调；结果表明，所提出的 ECWTFL 具有解调小腔长 FPI 传感器的能力。