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

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 intr...

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Bibliographic Details
Published in:Chinese physics B 2014-10, Vol.23 (10), p.155-161
Main Author: 白东碧 李文雪 杨康文 沈旭玲 陈修亮 曾和平
Format: Article
Language:English
Subjects:
Amplitudes
Fiber lasers
Fluctuation
Gaussian
Holes
Lasers
Modulation
Polarization
Pulse shape
宽脉冲
掺镱光纤激光器
脉冲光纤激光器
脉冲形状
脉冲放大器
脉冲整形
诱导
非线性偏振旋转
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Summary: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.
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/23/10/104208