Study on pulsed solid-state lasers with positive branch confocal unstable resonators

WANG Can-zhao; LI Li; SHANG Wei-dong; SUN Jian-guo; GUO Zhan-bin; LI Zhong-hua

doi:10.7510/jgjs.issn.1001-3806.2013.04.006

To obtain high beam quality pump sources for mid-infrared lasers, a Nd:YAG pulsed solid-state laser was designed with positive branch confocal unstable resonator. Under the influence of thermal effect, parameters of the positive branch confocal unstable resonator were optimized after numerical simulation and experimental verification. Single pulse energy of 260mJ, pulse width of 9.7ns and beam parameter product of 3.5mmmrad were achieved at 10Hz. After amplification and pumping MgO:LiNbO3 crystal, single pulse energy of 104mJ at 3.85m was obtained with pulse width of 8ns, and its optical-optical conversion efficiency gets up to 12.5%. The results demonstrate that beam quality of laser pump source meets the requirements of the mid-infrared optical parametric oscillation laser. The research lays the technical foundation for its application in the field of optoelectronic countermeasures.

Study on pulsed solid-state lasers with positive branch confocal unstable resonators

1. The 27th Research Institute, China Electronic Technology Group Corporation, Zhengzhou 450047, China

Received Date: 2012-10-15

Accepted Date: 2012-11-26

Available Online: 2013-07-25

Abstract: To obtain high beam quality pump sources for mid-infrared lasers, a Nd:YAG pulsed solid-state laser was designed with positive branch confocal unstable resonator. Under the influence of thermal effect, parameters of the positive branch confocal unstable resonator were optimized after numerical simulation and experimental verification. Single pulse energy of 260mJ, pulse width of 9.7ns and beam parameter product of 3.5mmmrad were achieved at 10Hz. After amplification and pumping MgO:LiNbO3 crystal, single pulse energy of 104mJ at 3.85m was obtained with pulse width of 8ns, and its optical-optical conversion efficiency gets up to 12.5%. The results demonstrate that beam quality of laser pump source meets the requirements of the mid-infrared optical parametric oscillation laser. The research lays the technical foundation for its application in the field of optoelectronic countermeasures.

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Reference (10)

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Study on pulsed solid-state lasers with positive branch confocal unstable resonators

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