Different modifications of acousto-optic modulators (AOMs) based on KG(WO4)2 (KGW) and KY(WO4)2 (KYW) crystals, designed for Q switching of high-power pulsed lasers, is developed and investigated. It is shown that AOMs based on these crystals are universal, can be combined with different lasers in the wavelength range of 1–3 mm, and have a high radiation resistance in the absence of antireflection coatings and light input at Brewster's angle. The operation efficiency of KGW-based AOMs is experimentally demonstrated. Solid-state lasers based on Cr : Er : YSGG (λ = 2.78 μm), Cr : Yb : Ho : YSGG (λ = 2.87 μm), Cr : Tm : Ho : YSGG (λ = 2.09 μm), and Nd : YAG (λ = 1.064 μm) crystals with active acousto-optic Q switching, operating in the repetitively pulsed regime with a high beam quality and without surface destruction, are investigated. Lasing pulses (30–60)-ns long with energy up to 32 mJ at a repetition rate from 1 to 1000 Hz are obtained.

中文翻译：

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基于 KGW 和 KYW 晶体的高功率激光辐射声光调制器

开发和研究了基于 KG(WO4)2 (KGW) 和 KY(WO4)2 (KYW) 晶体的声光调制器 (AOM) 的不同改进，专为高功率脉冲激光器的 Q 开关而设计。结果表明，基于这些晶体的 AOM 是通用的，可以与 1-3 毫米波长范围内的不同激光器结合，并且在没有抗反射涂层和布儒斯特角光输入的情况下具有高耐辐射性。实验证明了基于 KGW 的 AOM 的运行效率。基于 Cr : Er : YSGG (λ = 2.78 μm)、Cr : Yb : Ho : YSGG (λ = 2.87 μm)、Cr : Tm : Ho : YSGG (λ = 2.09 μm) 和 Nd : YAG 的固态激光器(λ = 1.064 μm) 晶体具有有源声光 Q 开关，在重复脉冲状态下工作，具有高光束质量且没有表面破坏。