Passively mode-locked and Q-switched fiber laser utilizing a same tungsten oxide (WO3) film as absorbers

被引：1
|
作者：
Tan, Xin [1 ]
Liu, Ya [1 ]
Zheng, Yongkang [1 ]
Xie, Zewu [1 ]
Yang, Jie [1 ]
机构：
[1] Yunnan Normal Univ, Sch Phys & Elect Informat Technol, Yunnan Key Lab Optoelect Informat Technol, Kunming 650500, Yunnan, Peoples R China
来源：
QUANTUM AND NONLINEAR OPTICS VIII | 2021年 / 11905卷
基金：
中国国家自然科学基金;
关键词：
Mode-locked fiber laser; Q-switching; hybrid mode-locking; saturable absorber;
D O I：
10.1117/12.2602761
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We demonstrate a passively mode-locked and a passively Q-switched erbium-doped fiber laser respectively by utilizing a same saturable absorber fabricated with tungsten trioxide (WO3). When the WO3 saturable absorber is employed to provide the pulse narrowing effect, Q-switched pulses were observed with a repetition rate of 44.11 kHz and a pulse width of 3.42 las. Moreover, the Q-switched laser could realize hybrid mode-locking after an in-line polarizer was inserted, which could introduce an additional pulse narrowing effect of nonlinear polarization rotation under a certain polarization state. The 3dB spectral bandwidth and the repetition rate of mode-locked pulses are about 7.5 nm and 22.51 MHz respectively. The pulse train is stable with a signal to noise ratio of 70 dB.
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页数：5
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