Single-frequency erbium-doped fiber laser based on self-injection feedback

Author:

Yang Jun,Chen Huiping,Song Shuxiang,Chen Guangrun,Zhao Peiyang

Abstract

In this paper, a single-frequency erbium-doped fiber laser based on self-injection feedback is reported, which uses a high-reflectivity broadband fiber Bragg grating, an ordinary commercial high-doped erbium fiber and a low-reflectivity broadband fiber Bragg grating to form the main resonant cavity, and a stable narrow linewidth single-frequency laser output is achieved by connecting a single-mode fiber and a low reflectivity narrowband fiber Bragg grating to form self-injection feedback. Then, a saturated double-pass erbium-doped fiber amplifier and a saturable absorber were added to the self-injection optical path, which well suppressed the relative intensity noise and phase noise and the relaxation oscillation intensity was well suppressed by about 18.08 dB, and the phase noise was 36.7dBc·Hz−1 suppression, the edge-mode rejection ratio is increased by 13 dB, and the final laser linewidth is about 270 Hz, and the output power is 8.5 dBm.

Funder

Central Guiding Local Science and Technology Development Fund Projects

Guangxi Normal University Major Scientific and Technological Achievements Transformation and Cultivation Project

Guilin City Science Research and Technology Development Plan Project

Publisher

Optica Publishing Group

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