201. In2S3-based saturable absorber for passively harmonic mode-locking in 2 μm region.
- Author
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Ma, Xiaohui, Chen, Wu, Tong, Liang, Liu, Shaoqing, Dai, Wenwen, Ye, Shanshan, Zheng, Ziqi, Wang, Yangyang, Zhou, Yong, Zhang, Wei, Fang, Wentan, Chen, Xiaolin, Liao, Meisong, and Gao, Weiqing
- Subjects
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MODE-locked lasers , *TUNED mass dampers , *OPTICAL switches , *FIBER lasers , *OPTICAL modulation , *SOLITONS - Abstract
• The mode-locking function of In 2 S 3 was experimentally demonstrated for the first time. • The 2nd to 11st harmonics were realized in 2-μm region. • The maximum harmonic-resonance frequency of 459 MHz that has ever been demonstrated in a In 2 S 3 -based fiber laser. There are few reports on the mode-locking operation of indium sulfide (In 2 S 3) in fiber lasers. In this paper, we experimentally demonstrate a harmonic mode-locked fiber laser in 2-μm region by taking advantage of an In 2 S 3 -based saturable absorber (SA). The In 2 S 3 -based SA has nonlinear optical modulation depth of 20.8 % and saturation power of 0.14 kW at 1930 nm. The fundamentally mode-locked solitons at 1938.59 nm with the 3-dB bandwidth of 5.04 nm, pulse width of 1.16 ps, and pulse repetition rate of 41.73 MHz are generated. The maximum harmonic-resonance frequency is 459 MHz (11th harmonic), which is the highest operating frequency that has been demonstrated in In 2 S 3 -based mode-locked fiber lasers as far as we know. The spectral and temporal characteristics of the output pulses are investigated versus harmonic order. The results prove that In 2 S 3 possesses the characteristics of mode-lockers and could be a promising optical switch for ultrafast pulses generation. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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