Direct liquid cooled Nd:YLF thin disk laser with unstable resonator

Zhibin Ye; Zhen Cai; Bo Tu; Ke Wang; Qingsong Gao; Chun Tang; Chong Liu

doi:10.1117/12.2202959

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15 October 2015 Direct liquid cooled Nd:YLF thin disk laser with unstable resonator

Zhibin Ye, Zhen Cai, Bo Tu, Ke Wang, Qingsong Gao, Chun Tang, Chong Liu

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Proceedings Volume 9671, AOPC 2015: Advances in Laser Technology and Applications; 967121 (2015) https://doi.org/10.1117/12.2202959
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

A large-aperture Nd:YLF thin disk laser oscillator is demonstrated, in which the refractive index matching liquid is used as the coolant flowing in narrow channels to cool the multiple thin disks directly. A high uniformity of pump intensity distribution is realized by using waveguides. With the a-cut Nd:YLF thin disks at different doping levels, a linearly polarized laser with the maximum output energy of 346 mJ is achieved with the repetition of 350 Hz, corresponding to an optical-optical efficiency of 8.7%, and a slope efficiency of 10%. The beam quality β factor is estimated less than 8 in the horizontal direction due to the positive branch confocal unstable resonator. To the best of our knowledge, it is the first time that the direct-liquid-cooled Nd:YLF thin disk unstable resonator is reported.

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Zhibin Ye, Zhen Cai, Bo Tu, Ke Wang, Qingsong Gao, Chun Tang, and Chong Liu "Direct liquid cooled Nd:YLF thin disk laser with unstable resonator", Proc. SPIE 9671, AOPC 2015: Advances in Laser Technology and Applications, 967121 (15 October 2015); https://doi.org/10.1117/12.2202959

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