Er-doped mode-locked fiber lasers based on nonlinear polarization rotation and nonlinear multimode interference

被引：44

作者：

Dong, Zhipeng ^{[1
]}

Lin, Jiaqiang ^{[1
]}

Li, Hongxun ^{[1
]}

Zhang, Yimin ^{[1
]}

Gu, Chun ^{[1
]}

Yao, Peijun ^{[1
]}

Xu, Lixin ^{[1
]}

机构：

[1] Univ Sci & Technol China, Dept Opt & Opt Engn, Hefei 230026, Peoples R China

来源：

OPTICS AND LASER TECHNOLOGY | 2020年 / 130卷

基金：

中国国家自然科学基金;

关键词：

Mode-locked laser; Fiber laser; Ultrafast optics; SATURABLE ABSORBER; INSTABILITY; OSCILLATOR;

D O I：

10.1016/j.optlastec.2020.106337

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report an Er-doped fiber laser based on a hybrid mode-locked mechanism, which include a graded-index multimode fiber as a saturable absorber (SA) and nonlinear polarization rotation (NPR). By adopting two distinct mechanisms simultaneously, the laser can output shorter pulses with a high signal-to-noise ratio (SNR) and low noise jitter. At a pump power of 110 mW, a mode-locked pulse train with a pulse duration of 1.8 ps and a repetition rate of 49.80 MHz is generated. Compared with the implementation of the NPR mode-locked mechanism alone, the implementation of the hybrid mode-locked mechanism increased the SNR of the laser from 44 dB to 70 dB. The standard deviation of the average power fluctuation is 1.53%. Besides, a stable harmonic mode-locked pulse train can be obtained and switched by merely adjusting the pump power.

引用

页数：4

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