• High Power Laser Science and Engineering
  • Vol. 9, Issue 3, 03000e46 (2021)
Dongyu Yan, Bowen Liu*, Defeng Zou, Jie Guo, Yuxi Chu, Youjian Song, and Minglie Hu
Author Affiliations
  • Ultrafast Laser Laboratory, School of Precision Instrument and Optoelectronics Engineering, Key Laboratory of Optoelectronic Information Technology (Ministry of Education), Tianjin University, Tianjin300072, China
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    Abstract

    We numerically and experimentally investigate the multi-pulsing mechanism in a dispersion-managed mode-locked Yb-doped fiber laser. Multi-pulsing occurs primarily owing to the inherent filtering effect of the chirped fiber Bragg grating. The spectral filtering effect restricts the spectral broadening induced by self-phase modulation and causes extra loss, leading to a decreased pump power threshold for the multi-pulsing state. Numerical simulations show that multi-pulsing emerges at a lower pump power when the spectral filter bandwidth becomes narrower. In the experiment, the spectral width increases as the net cavity dispersion approaches zero. Pulses with wider spectral widths experience more loss from the spectral filtering effect, leading to a decreased pump power threshold for multi-pulsing. Therefore, the net cavity dispersion also has an impact on the multi-pulsing threshold. Based on this conclusion, we devise a strategy to obtain single-pulsing operation with the shortest pulse width and the highest pulse energy.
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    Dongyu Yan, Bowen Liu, Defeng Zou, Jie Guo, Yuxi Chu, Youjian Song, Minglie Hu. Spectral filtering effect on multi-pulsing induced by chirped fiber Bragg grating in dispersion-managed mode-locked Yb-doped fiber lasers[J]. High Power Laser Science and Engineering, 2021, 9(3): 03000e46
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    Category: Research Articles
    Received: Mar. 13, 2021
    Accepted: Jul. 2, 2021
    Published Online: Aug. 19, 2021
    The Author Email: Bowen Liu (bwliu@tju.edu.cn)