一种线偏振波长可调谐的 Q 开关光纤激光器，其光谱带宽为 112MHz。

A Linearly Polarized Wavelength-Tunable Q-Switched Fiber Laser with a Narrow Spectral Bandwidth of 112 MHz.

机构信息

Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China.

School of Physics and Optoelectronic Engineering, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou 310024, China.

出版信息

Sensors (Basel). 2023 May 27;23(11):5128. doi: 10.3390/s23115128.

DOI:10.3390/s23115128

PMID:37299855

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10255775/

Abstract

A tunable and narrow-bandwidth Q-switched ytterbium-doped fiber (YDF) laser is investigated in this paper. The non-pumped YDF acts as a saturable absorber and, together with a Sagnac loop mirror, provides a dynamic spectral-filtering grating to achieve a narrow-linewidth Q-switched output. By adjusting an etalon-based tunable fiber filter, a tunable wavelength from 1027 nm to 1033 nm is obtained. When the pump power is 1.75 W, the Q-switched laser pulses with a pulse energy of 10.45 nJ, and a repetition frequency of 11.98 kHz and spectral linewidth of 112 MHz are obtained. This work paves the way for the generation narrow-linewidth Q-switched lasers with tunable wavelengths in conventional ytterbium, erbium, and thulium fiber bands to address critical applications such as coherent detection, biomedicine, and nonlinear frequency conversion.

摘要

本文研究了一种可调谐、窄线宽的掺镱光纤（YDF）激光器。未泵浦的 YDF 用作可饱和吸收体，与萨格纳克环镜一起构成动态光谱滤波光栅，实现窄线宽 Q 开关输出。通过调整基于法布里-珀罗标准具的可调谐光纤滤波器，获得了从 1027nm 到 1033nm 的可调谐波长。当泵浦功率为 1.75W 时，获得了脉冲能量为 10.45nJ、重复频率为 11.98kHz 和光谱线宽为 112MHz 的 Q 开关激光脉冲。这项工作为在传统的掺镱、掺铒和掺铥光纤波段中产生具有可调谐波长的窄线宽 Q 开关激光器铺平了道路，以满足相干检测、生物医学和非线性频率转换等关键应用的需求。