磷酸二氘钾晶体快速生长及其均匀性

Rapid Growth and Homogeneity of High Deuterium Potassium Dideuterium Phosphate Crystal

高功率激光系统的发展对大尺寸、高性能磷酸二氘钾(DKDP)类晶体的需求越来越大。快速生长法较传统法可大幅缩短晶体生长周期,提高晶体生长效率。但是快速生长DKDP晶体锥面区和柱面区性能存在差异,导致不同位置的性能存在不均匀性,限制其在高功率激光系统中的应用。通过合成晶体生长溶液,采用点籽晶快速生长法生长了中等口径的高氘DKDP晶体,使用透过光谱,从线性吸收角度分析了快长DKDP晶体用作电光开关和频率转换器的可行性。结合Raman光谱技术及摇摆曲线的测试方法分析了晶体氘含量和结晶质量均匀性,为大尺寸DKDP的生长和应用提供参考。

A demand for large size and high-performance potassium dideuterium phosphate crystals(DKDP)is increasing with the development of high-power laser system.Compared with the conventional methods,a rapid growth method can shorten the crystal growth period and improve the crystal growth efficiency.However,the properties of the rapidly growing DKDP crystals in pyramidal and prismatic regions are different,leading to the inhomogeneity of the properties in different positions and restricts its application in high-power laser systems.In this paper,potassium dideuterium phosphate crystals with a medium size were grown by a point seed rapid growth method.The feasibility of using rapidly-growth DKDP crystal as electro-optical switch and frequency converter was analyzed by transmittance spectroscopy according to the linear absorption properties.The homogeneity of deuterium content and the crystal quality were analyzed by Raman spectroscopy and rocking curve analysis,respectively.This work can provide a reference for the growth and application of large size potassium dideuterium phosphate crystal.