›› 2014, Vol. 23 ›› Issue (10): 104208-104208.doi: 10.1088/1674-1056/23/10/104208

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇    下一篇

Nonlinear polarization rotation-induced pulse shaping in a stretched-pulse ytterbium-doped fiber laser

白东碧, 李文雪, 杨康文, 沈旭玲, 陈修亮, 曾和平   

  1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
  • 收稿日期:2014-02-13 修回日期:2014-03-24 出版日期:2014-10-15 发布日期:2014-10-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11274115 and 10990101), the National Key Project for Basic Research of China (Grant No. 2011CB808105), the National Key Scientific Instrument Project, China (Grant No. 2012YQ150092), the Natural Science Foundation of Shanghai, China (Grant No. 11ZR1410900), and the Innovation Program of Shanghai Municipal Education Commission, China (Grant No. 2014Z10269011).

Nonlinear polarization rotation-induced pulse shaping in a stretched-pulse ytterbium-doped fiber laser

Bai Dong-Bi (白东碧), Li Wen-Xue (李文雪), Yang Kang-Wen (杨康文), Shen Xu-Ling (沈旭玲), Chen Xiu-Liang (陈修亮), Zeng He-Ping (曾和平)   

  1. State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai 200062, China
  • Received:2014-02-13 Revised:2014-03-24 Online:2014-10-15 Published:2014-10-15
  • Contact: Li Wen-Xue E-mail:wxli@phy.ecnu.edu.cn
  • About author:42.55.Wd; 42.65.-k; 42.60.Fc; 84.30.Ng
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11274115 and 10990101), the National Key Project for Basic Research of China (Grant No. 2011CB808105), the National Key Scientific Instrument Project, China (Grant No. 2012YQ150092), the Natural Science Foundation of Shanghai, China (Grant No. 11ZR1410900), and the Innovation Program of Shanghai Municipal Education Commission, China (Grant No. 2014Z10269011).

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摘要： We report on controllable pulse shaping in a Yb-doped stretched-pulse fiber laser followed by a high-power chirped pulse amplifier. We demonstrate that the pulses after an extra-cavity grating pair change their intensity profile from Lorentz to Gaussian and then to sech2 shapes by adjusting the intra-cavity polarization through a quarter-wave plate inside the fiber laser cavity. The laser pulses with different pulse shapes exhibit pulse-to-pulse amplitude fluctuation of ～ 1.02%, while the sech2-shaped pulse train is provided with a more stable free-running repetition rate as a result of the stronger self-phase modulation in the fiber laser cavity than Lorentz-and Gaussian-shaped pulse trains.

关键词: fiber lasers, nonlinear optics, mode locking, pulse generators

Abstract: We report on controllable pulse shaping in a Yb-doped stretched-pulse fiber laser followed by a high-power chirped pulse amplifier. We demonstrate that the pulses after an extra-cavity grating pair change their intensity profile from Lorentz to Gaussian and then to sech2 shapes by adjusting the intra-cavity polarization through a quarter-wave plate inside the fiber laser cavity. The laser pulses with different pulse shapes exhibit pulse-to-pulse amplitude fluctuation of ～ 1.02%, while the sech2-shaped pulse train is provided with a more stable free-running repetition rate as a result of the stronger self-phase modulation in the fiber laser cavity than Lorentz-and Gaussian-shaped pulse trains.

Key words: fiber lasers, nonlinear optics, mode locking, pulse generators

中图分类号:  (Fiber lasers)

  • 42.55.Wd
42.65.-k (Nonlinear optics) 42.60.Fc (Modulation, tuning, and mode locking) 84.30.Ng (Oscillators, pulse generators, and function generators)