Free-running operation of a semi-monolithic LBO-based resonant cavity for high-power continuous-wave second-harmonic generation.

Applied optics Pub Date : 2025-09-20 DOI:10.1364/AO.573796
Sébastien Vidal, Valérian Freysz, Damien Bonaudo, Dominique Lupinski, Marc Castaing
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Abstract

In this paper, we present a novel method, to the best of our knowledge, for achieving high-power second-harmonic generation (SHG) of continuous-wave light. By employing lithium triborate-based resonant cavity with moderate finesse, we propose an approach for generating efficient SHG in the visible and ultraviolet spectral ranges without requiring an active electronic servo loop. As a proof of concept, we demonstrate frequency doubling of a high-power 1064 nm laser to 532 nm. To the best of our knowledge, this is the first implementation of such a cavity featuring a highly reflective coating on one end of this crystal. This quasi-monolithic design enables simultaneous control of phase matching and cavity resonance solely through temperature adjustment of the nonlinear crystal.

用于大功率连续波二次谐波产生的半单片lbo谐振腔的自由运行。
在本文中,我们提出了一种新方法,据我们所知,实现连续波光的高功率二次谐波产生(SHG)。通过采用适度精细的三硼酸锂基谐振腔,我们提出了一种在可见光和紫外光谱范围内产生高效SHG的方法,而无需主动电子伺服回路。作为概念验证,我们演示了高功率1064 nm激光器的频率翻倍至532 nm。据我们所知,这是第一次在这种晶体的一端实现具有高反射涂层的腔体。这种准单片设计使得仅通过非线性晶体的温度调节就可以同时控制相位匹配和腔谐振。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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