Novel method to improve the performance of Nd:YAG high-power low-divergence lasers using a passive compensation of the spherical aberration inside the resonator

A. Montmerle Bonnefois; M. Gilbert; P.-Y. Thro; J.-M. Weulersse

doi:10.1117/12.592145

27 April 2005 Novel method to improve the performance of Nd:YAG high-power low-divergence lasers using a passive compensation of the spherical aberration inside the resonator

A. Montmerle Bonnefois, M. Gilbert, P.-Y. Thro, J.-M. Weulersse

Author Affiliations +

Proceedings Volume 5707, Solid State Lasers XIV: Technology and Devices; (2005) https://doi.org/10.1117/12.592145
Event: Lasers and Applications in Science and Engineering, 2005, San Jose, California, United States

Abstract

It is very difficult to achieve both high-power and low divergence lasing at once in cw or high-repetition rate lasers because thermal effects limit their efficiency. But as these effects are stable over time, a passive correction is conceivable. In this paper we propose a very simple but effective method to compensate the thermal effects in such lasers, using an aspherical phase-plate inside the resonator. The first results are very promising, as we demonstrated a very stable 418 W, M²=5.7 laser for only 2280 W of total optical pumping power (i.e 2050 W of absorbed pump power).

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A. Montmerle Bonnefois, M. Gilbert, P.-Y. Thro, and J.-M. Weulersse "Novel method to improve the performance of Nd:YAG high-power low-divergence lasers using a passive compensation of the spherical aberration inside the resonator", Proc. SPIE 5707, Solid State Lasers XIV: Technology and Devices, (27 April 2005); https://doi.org/10.1117/12.592145

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