激光器
光纤激光器
光学
边带
超短脉冲
光谱宽度
物理
材料科学
多普勒展宽
极化(电化学)
光电子学
谱线
微波食品加热
化学
物理化学
量子力学
天文
作者
Zhenhua Hao,Hongfa Yu,Siyu Zhou,J. Liu,Xiao Hui Li,Yishan Wang,Chao Gao
出处
期刊:Nanomaterials
[MDPI AG]
日期:2024-04-23
卷期号:14 (9): 739-739
被引量:1
摘要
We conducted a systematic investigation into the spectral and pulse characteristics of C and L-band Nonlinear Polarization Rotation (NPR) mode-locked fiber lasers effectively employing nonlinear polarization rotation technology. In our experimental setup, we achieved a stable mode-locked state at 1560.076 nm, exhibiting a 3 dB spectral bandwidth of 9.1 nm. As the pump power increased, we observed spectral shifts accompanied by shifts in the first Kelly sideband and the generation of new Kelly sidebands. In this paper, the phenomenon of spectral deviation is elucidated through the interplay of self-phase modulation, group velocity drift, and polarization-dependent isolator (PD-ISO) filter effect, with an analysis of the formation and deviation of Kelly sidebands. Notably, spectral shift persisted even when the pump power exceeded 200 mW. However, continuous pump power escalation led to soliton splitting, resulting in the formation of new soliton beams. Based on the simultaneous generation of spectral shift and pulse splitting, our study contributes to an enhanced understanding of soliton dynamics in ultrafast fiber lasers and lays a foundation for the application of high-repetition-frequency harmonic mode-locked lasers with tunable wavelengths.
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