Gaussian output coupler and resonator geometry of confocal unstable resonator

Jinxiong Wang; Zongying Mu; Pinglei Zhang

doi:10.1117/12.253260

30 September 1996 Gaussian output coupler and resonator geometry of confocal unstable resonator

Jinxiong Wang, Zongying Mu, Pinglei Zhang

Proceedings Volume 2889, High-Power Lasers: Solid State, Gas, Excimer, and Other Advanced Lasers; (1996) https://doi.org/10.1117/12.253260
Event: Photonics China '96, 1996, Beijing, China

Abstract

In this paper, we present a simple and easy-use geometrical approach for designing the unstable resonator of Nd:YAG laser with a Gaussian output coupler. An equivalent rear mirror, which formed a confocal resonator with the output coupler, was introduced to include the effects of rear mirror, the thermal focus of YAG rod and optical path of Q- switch. Numerical results were calculated for various couples of matching curvatures of rear mirror and output coupler under the confocal condition. The correspondent optimal spot sizes of the output coupler were also given. Couples of mirrors were selected according to theoretical parameters and applied to the experimental setup. A high- beam-quality output with Gaussian profile, and high efficiency of second harmonic generation were obtained. The experimental results were in good agreement with theoretical prediction.

Citation Download Citation

Jinxiong Wang, Zongying Mu, and Pinglei Zhang "Gaussian output coupler and resonator geometry of confocal unstable resonator", Proc. SPIE 2889, High-Power Lasers: Solid State, Gas, Excimer, and Other Advanced Lasers, (30 September 1996); https://doi.org/10.1117/12.253260

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