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Theoretical and experimental study on nonlinear effects of mode-locked and extracavity modulation nanosecond pulsed laser
Author(s): Shun Li; Pingxue Li; Min Yang; Kaixuan Wang; Wenhao Xiong; Chuanfei Yao
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Paper Abstract

Through simulation calculations and experiments, the two popular methods of generating nanosecond (ns) pulsed laser were studied respectively. A new method for generating a ns pulsed laser with high power and ultra-high repetition frequency by using dispersive fiber after SESAM mode-locked oscillator was proposed. In the simulation calculation of the mode-locked ns pulsed laser, the time-frequency evolution characteristics of the laser formation process were analyzed. The variation process of the stimulated Raman scattering (SRS) effect was obtained at different injection powers. In the simulation calculation of the extracavity modulation ns pulsed laser, the threshold of the stimulated Brillouin scattering (SBS) effect was obtained in the 4-stage fiber amplification experiment. Then, the nonlinear dynamics model of the ns pulsed fiber laser was established by considering various nonlinear effects. The results showed the theoretical models were consistent with the experimental investigations. This provided a new way to further optimize the parameter of ns pulsed fiber lasers and also contribute to solve nonlinear damage problems in such lasers.

Paper Details

Date Published: 17 May 2019
PDF: 8 pages
Proc. SPIE 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019), 111702G (17 May 2019); doi: 10.1117/12.2533712
Show Author Affiliations
Shun Li, Beijing Univ. of Technology (China)
Pingxue Li, Beijing Univ. of Technology (China)
Min Yang, Beijing Univ. of Technology (China)
Kaixuan Wang, Beijing Univ. of Technology (China)
Wenhao Xiong, Beijing Univ. of Technology (China)
Chuanfei Yao, Beijing Univ. of Technology (China)


Published in SPIE Proceedings Vol. 11170:
14th National Conference on Laser Technology and Optoelectronics (LTO 2019)
Jianqiang Zhu; Weibiao Chen; Zhenxi Zhang; Minlin Zhong; Pu Wang; Jianrong Qiu, Editor(s)

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