【作者】 赵开祺； 余婷； 刘晶； 钱传鹏； 施翔春； 叶锡生； 曹清；

【Author】 Zhao Kaiqi;Yu Ting;Liu Jing;Qian Chuanpeng;Shi Xiangchun;Ye Xisheng;Cao Qing;College of Sciences,Shanghai University;Laboratory of High Power Fiber Laser Technology,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences;Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences;

【机构】 上海大学理学院； 中国科学院上海光学精密机械研究所高功率光纤激光技术实验室； 中国科学院上海光学精密机械研究所上海市全固态激光器与应用技术重点实验室；

【摘要】 本文主要介绍红外非线性晶体BaGa₄Se₇的基本结构、物理性质、非线性效应相关参数大小及其在光参量振荡和光参量放大方面的研究进展。该晶体非线性系数较大(d₁₁和d₁₃分别为24.3pm/V、-20.6pm/V)、透光范围宽（0.47-18μm）、激光损伤阈值较高（557MW/cm²@1.064μm/5ns/1Hz）、双折射系数适中（0.07@1.064μm）,且具有一致熔融的特点,通过Bridgman-Stockbarger法可生长出大口径的单晶棒,因此是一种具有广阔应用前景的新型红外非线性晶体。目前,已经有多个研究机构开展了BaGa₄Se₇-OPO/OPA理论与实验研究。更多还原

【Abstract】 The research progress review focused on infrared nonlinear crystal BaGa₄ Se₇,including its basic structure,physical property,parameter values of nonlinear effects and optical parametric oscillator/amplifier（OPO/OPA） performance,will be shown and discussed in this article.The BaGa₄Se₇ crystal has many advantages such as large nonlinear index(the values of d₁₁ and d₁₃ are 24.3 pm/V and-20.6 pm/V),wide transparent range（0.47-18μm）,high laser induced damage threshold（557 MW/cm²@1.064μm）/5 ns/1 Hz) and modest birefractive index（0.07@1.064μm）.Moreover,owing to its characteristic of congruent melting,high quality and large aperture single crystal bulk could be grown via the Bridgman-Stockbarger method.Aforementioned excellent properties indicate that BaGa₄Se₇ crystal could be widely applied in the infrared nonlinear frequency conversion technology.Up to date several scientific research institutions have been carrying out the theoretical and experimental investigation on BaGa₄Se₇-OPO/OPA performance.更多还原