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

doi:10.1088/1674-1056/23/10/104208

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.

Keywords: fiber lasers nonlinear optics mode locking pulse generators

Received: 13 February 2014
Revised: 24 March 2014
Accepted manuscript online:

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

Fund: 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).

Corresponding Authors: Li Wen-Xue
E-mail: wxli@phy.ecnu.edu.cn

About author: 42.55.Wd; 42.65.-k; 42.60.Fc; 84.30.Ng

Cite this article:

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) Nonlinear polarization rotation-induced pulse shaping in a stretched-pulse ytterbium-doped fiber laser 2014 Chin. Phys. B 23 104208


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

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