激光晶体钾稀土钨酸盐 KRE(WO₄)₂（RE=Y、Yb、Gd 和 Lu）的弹性和光弹特性。

Elastic and photo-elastic characteristics of laser crystals potassium rare-earth tungstates KRE(WO₄)₂, where RE=Y, Yb, Gd and Lu.

机构信息

Federal State Unitary Enterprise (FSUE) "National Research Institute for Physicotechnical and Radio Engineering Measurements "VNIIFTRI", Mendeleyevo 141570, Russia.

Scientific and Technological Centre of Unique Instrumentation (STC UI RAS), 15 Butlerova str., Moscow 117342, Russia.

出版信息

Ultrasonics. 2014 Jul;54(5):1311-7. doi: 10.1016/j.ultras.2014.01.009. Epub 2014 Jan 23.

DOI:10.1016/j.ultras.2014.01.009

PMID:24502869

Abstract

The elastic and photo-elastic characteristics of four laser crystals KY(WO₄)₂, KGd(WO₄)₂, KYb(WO₄)₂, and KLu(WO₄)₂ are presented. The first pair was reported early, and the last two materials have been investigated for the first time. The full matrix of elastic constants of these monoclinic crystals has been determined. Also, acousto-optical figure of merit for all the basic geometries of isotropic diffraction has been measured. It is proved that potassium rare-earth tungstates has rather good acousto-optical properties and particularly can take place of fused silica in technical applications required high power laser radiation. All the results demonstrate good prospect of these optically bi-axial laser crystals for development of new effective acousto-optical devices.

摘要

本文介绍了四种激光晶体 KY(WO₄)₂、KGd(WO₄)₂、KYb(WO₄)₂ 和 KLu(WO₄)₂ 的弹性和光弹特性。前一对晶体的相关特性早前已有报道，而后两种材料则是首次被研究。本文还确定了这些单斜晶体完整的弹性常数矩阵，并测量了各向同性衍射所有基本几何形状的声光优值。实验证明，钾稀土钨酸盐具有相当好的声光性能，特别是在需要高功率激光辐射的技术应用中可以替代石英。所有的结果都表明，这些光双轴激光晶体在开发新的有效声光器件方面具有良好的应用前景。