Beam quality enhancement in side-pumped master oscillator power amplifier system

Qi Yunxuan; Liu Chong; Zhang Xiang; Ye Zhibin; Xiang Zhen; Chen Jun

doi:10.11884/HPLPB201426.091023

Volume 26 Issue 09

Aug. 2014

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Article Navigation > High Power Laser and Particle Beams > 2014 > 26(09): 091023

Wang Kai, Lü Xueyang, Wu Kunlin, et al. Effects of different sequential neutron/gamma irradiation on current gain of bipolar devices[J]. High Power Laser and Particle Beams, 2020, 32: 044001. doi: 10.11884/HPLPB202032.190333

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Qi Yunxuan, Liu Chong, Zhang Xiang, et al. Beam quality enhancement in side-pumped master oscillator power amplifier system[J]. High Power Laser and Particle Beams, 2014, 26: 091023. doi: 10.11884/HPLPB201426.091023

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Beam quality enhancement in side-pumped master oscillator power amplifier system

doi: 10.11884/HPLPB201426.091023

1.
State Key Laboratory of Modern Optical Instrumentation,Zhejiang University,Hangzhou 310027,China

Received Date: 2014-03-04
Rev Recd Date: 2014-05-22
Publish Date: 2014-08-18

Abstract

Abstract

The beam quality enhancement in a side-pumped master oscillator power amplifier is experimentally realized by a novel method of spherical aberration compensation. Numerical calculations show that the positive spherical aberration is reversed to a negative one after the beam focus; in addition, the negative spherical aberration can be compensated by another amplifier. A two-stage side-pumped Nd:YAG master oscillator power amplifier has been developed. Seed beam from the oscillator with 42 W CW output power and a beam quality of 1.48 has been boosted up to 74 W after the first amplifier, with a degraded beam quality of 1.80. As expected, the output beam quality has been enhanced to 1.40 after the second amplifier. The experimental results verify the validity of the method to improve the beam quality in the process of laser amplification.
- side-pumped lasers,
- master oscillator power amplifier,
- spherical aberration compensation,
- beam quality

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