1.6-µm single-frequency erbium-doped fiber laser based on two cascaded subrings

作者：Yaqi Zhai, Han Wen, Haowei Chen, Baole Lu, Jintao Bai · 发表于：Chinese Optics Letters · 年份：2024 · DOI：10.3788/col202422.041406 · 被引用次数：7 · 研究领域：Advanced Fiber Optic Sensors、Photonic Crystal and Fiber Optics、Advanced Fiber Laser Technologies

We demonstrate a stable narrow linewidth single-frequency erbium-doped fiber laser (EDFL) operating at 1.6 μm.A Fabry-Perot fiber Bragg grating and two cascaded subrings are incorporated in the main ring cavity to achieve singlefrequency operation.The experimentally measured optical signal-to-noise ratio is greater than 73 dB.Furthermore, the linewidth of the EDFL is measured to be about 480 Hz by the self-built short-delayed self-heterodyne interferometry device.The laser shows superior stability, with no mode-hopping during the 60-min observation period.The proposed EDFL provides a new experimental idea for realizing a single-frequency fiber laser in the L-band.