Beam quality improvement by gain guiding effect in end-pumped Nd:YVO₄ laser amplifiers

In end-pumped Nd:YVO₄ amplifiers, beam quality improvement is obtained both in theory and in experiments. A theoretical model of gain-guided laser amplifier is developed by comprehensively considering thermal effect, gain guiding and gain saturation effect. Several key parameters of the amplifier ar...

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Published in:Optics express 2011-10, Vol.19 (21), p.21060-21073
Main Authors: Xiang, Zhen, Wang, Dan, Pan, Sunqiang, Dong, Yantao, Zhao, Zhigang, Li, Tong, Ge, Jianhong, Liu, Chong, Chen, Jun
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container_end_page 21073
container_issue 21
container_start_page 21060
container_title Optics express
container_volume 19
creator Xiang, Zhen
Wang, Dan
Pan, Sunqiang
Dong, Yantao
Zhao, Zhigang
Li, Tong
Ge, Jianhong
Liu, Chong
Chen, Jun
description In end-pumped Nd:YVO₄ amplifiers, beam quality improvement is obtained both in theory and in experiments. A theoretical model of gain-guided laser amplifier is developed by comprehensively considering thermal effect, gain guiding and gain saturation effect. Several key parameters of the amplifier are discussed such as the input beam quality, the beam filling factor between input beam and pump beam, the ratio between input power and pump power, and the length of laser crystal. The theoretical results are confirmed by the experiments.
doi_str_mv 10.1364/OE.19.021060
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title Beam quality improvement by gain guiding effect in end-pumped Nd:YVO₄ laser amplifiers
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