Effects of gain distribution on self-similar amplification of picosecond pulses

被引：0
|
作者：
Zhang Y. [1 ]
Liu B. [1 ]
Song H. [1 ]
Li Y. [1 ]
Chai L. [1 ]
Hu M. [1 ]
机构：
[1] Ultrafast Laser Laboratory, College of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin
来源：
Hongwai yu Jiguang Gongcheng/Infrared and Laser Engineering | 2021年 / 50卷 / 04期
关键词：
Fiber amplifier; Gain distribution; Picosecond laser; Self-similar amplification;
D O I：
10.3788/IRLA20190565
中图分类号：
学科分类号：
摘要：
The effects of gain distribution on self-similar amplification of picosecond pulses in a Yb-doped fiber laser system were studied by numerical simulation. Ultrashort laser pulses amplified in self-similar amplification theoretical model was established to analyze the impact of pump configuration, fiber length and total gain coefficient on the self-similar amplification evolution and laser output performance. Detailed numerical simulation reveals that the best self-similar amplification result can be found for different cases, where high-quality self-similar pulses with ~100 fs transform-limited pulse duration are obtained. It is demonstrated that the self-similar evolution speed in a forward-pumping scheme is faster than that in a backward-pumping scheme for a fixed seed pulse. Furthermore, the results indicate that for the self-similar amplifier with different fiber lengths and gain coefficients, the forward-pumping scheme shows better evolution results in lower seed energy and longer wavelength range, while the backward-pumping scheme is more suitable for the higher seed energy and shorter wavelength range. Copyright ©2021 Infrared and Laser Engineering. All rights reserved.
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