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

被引：2
作者：
Zhu, Chengjie [1 ,2 ]
Yang, Xuezong [2 ]
Liu, Yuxuan [1 ,2 ]
Li, Muye [2 ]
Sun, Yuxiang [2 ]
You, Wei [1 ,2 ]
Dong, Peng [3 ]
Chen, Dijun [1 ,2 ]
Feng, Yan [1 ,2 ]
Chen, Weibiao [1 ,2 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
[2] Univ Chinese Acad Sci, Hangzhou Inst Adv Study, Sch Phys & Optoelect Engn, Hangzhou 310024, Peoples R China
[3] Univ Chinese Acad Sci, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Key Lab Gravitat Wave Precis Measurement Zhejiang, Hangzhou 310024, Peoples R China
来源：
SENSORS | 2023年 / 23卷 / 11期
基金：
中国国家自然科学基金;
关键词：
fiber laser; Q-switched fiber laser; saturable dynamic induction grating; narrow bandwidth; tunable wavelength; GENERATION; POWER;
D O I：
10.3390/s23115128
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
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.
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页数：8
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