Internal Pulse Width Compression Technology of All-fiber Q-switched Laser

被引：0

作者：

Cao K. ^{[1
]}

Qin W.-B. ^{[1
]}

Ge T.-W. ^{[1
]}

Wu D. ^{[1
]}

Jia G.-N. ^{[1
]}

Yan A.-R. ^{[1
]}

Cao Y.-H. ^{[1
]}

Wang Z.-Y. ^{[1
]}

机构：

[1] Institute of Laser Engineering, Beijing University of Technology, Beijing

来源：

Ge, Ting-Wu (getingwu@bjut.edu.cn) | 2018年 / Editorial Office of Chinese Optics卷 / 39期

关键词：

All-fiber; Pulse width; Q-switched;

D O I：

10.3788/fgxb20183906.0802

中图分类号：

学科分类号：

摘要：

In order to compress the pulse width of MOPA all-fiber Q-switched lasers, the basic parameters of the resonator were studied. Firstly, the expression of the pulse width was deduced according to the rate equation theory, and the relationship between the expression parameters and the pulse width was established by numerical solution. Then, the effects of gain fiber length, cavity output transmittance and Q-switch performance on the output pulse width of all-fiber Q-switched source were analyzed and the results were verified experimentally. Finally, an all-fiber Q-switched laser was constructed by optimizing the parameters. At the repetition frequency of 20 kHz, the seed laser output with pulse width of 54 ns and average power of 0.86 W was obtained. At the repetition frequency of 100 kHz, the seed light with the pulse width of 142 ns and the average power of 1.66 W was used to prevent large and main power amplification, and finally the stable pulse laser output with average power of 120 W, pulse width of 180 ns and spectral width of 0.67 nm was obtained. The Q-switched fiber lasers can be constructed by optimizing the AOM performance and reducing the length of the gain fiber to optimize the pulse width of the resonator. © 2018, Science Press. All right reserved.

引用

页码：802 / 808

页数：6

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