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

作　　者：白东碧 李文雪 杨康文 沈旭玲 陈修亮 曾和平 

机构地区：[1]State Key Laboratory of Precision Spectroscopy, East China Normal University

出　　处：《Chinese Physics B》2014年第10期155-161,共7页中国物理B（英文版）

基　　金：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);the Innovation Program of Shanghai Municipal Education Commission,China(Grant No.2014Z10269011)

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.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 

分 类 号：TN248[电子电信—物理电子学]