KDP类晶体快速生长技术研究进展(特邀)  

Research Progress on Rapid-Growth Technique for KDP-Type Crystals(Invited)

作　　者：齐红基[1] 邵建达[1] 王斌[1] 吴福林[1] 陈端阳[1] 陶光辉 陈征民 顿爱欢[1] Qi Hongji;Shao Jianda;Wang Bin;Wu Fulin;Chen Duanyang;Tao Guanghui;Chen Zhengmin;Dun Aihuan(Key Laboratory of Intense Laser Materials,Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai 201800,China)

机构地区：[1]中国科学院上海光学精密机械研究所强激光材料重点实验室,上海201800

出　　处：《中国激光》2024年第11期173-180,共8页Chinese Journal of Lasers

基　　金：国家科技专项资助项目。

摘　　要：从技术路线、生长设备和工艺优化3个方面简述KDP类晶体快速生长领域的研究进展。通过生长集成控制系统的研制、循环过滤系统的优化升级,以及晶体生长实时监控系统、大尺寸KDP类晶体线切割设备、高精密退火设备的研发,实现晶体生长、切割、退火的全链路突破;通过数值模拟仿真优化晶体生长浓度场,实现晶体稳定良好的生长,利用精密热退火进一步提高晶体的光透过性能和抗激光损伤性能。针对晶体柱锥交界面影响高功率激光光束质量的问题,提出长籽晶快速生长法,从锥区限制生长发展到自由生长进行不断改进优化,不断地改善晶体生长流场结构,提高晶体损伤性能。Significance The main methods of controlled fusion are magnetic and inertial confinement.Between them,inertial-confinement fusion(ICF)uses a higher-power laser beam or higher-energy particle-beam irradiation to focus energy on a deuterium-tritium fuel target pellet with a diameter of only a few millimeters,which rapidly yields a temperature and pressure similar to the core of a star or nuclear explosion,followed by nuclear fusion.Basov.N.G.first proposed the concept of ICF in 1963,and then Chinese nuclear physicist Wang Ganchang proposed laser-driven ICF,which propelled investigations into ICF in China.The emergence and development of high-power lasers have enabled ICF.Currently,the world s major stakeholders are investing significant resources into developing high-power laser devices,e.g.,the world s largest laser device NOVA developed in the United States in 1985,the construction of a megajoule laser device at the United States National Ignition Facility(NIF),France,and the development of a series laser device by Shenguang,China.Short-wavelength laser beams have greater energy and couple more efficiently to the target pellet compared with long-wavelength laser beams.Therefore,for large ICF devices,high-quality electro-optical and nonlinear optical materials are required to convert the 1064 nm laser output wavelength of neodymium glass to 355 nm.Additionally,the materials must exhibit a large aperture,a high laser-damage threshold,large nonlinear optical and electro-optical coefficients,a wide transmission band,and low refractive-index inhomogeneity.KDP-class crystals are excellent nonlinear optical crystal materials with high resistance to laser damage,wide transmittance bands,high electro-optical coefficients,good optical uniformity,and the ability to grow into large crystals.Therefore,large KDP-class crystals are the only type of crystal that can be used for electro-optical switches and frequency-conversion devices in large-caliber high-power laser-driven devices.Progress To address the low efficiency of the

关 键 词：KDP类晶体 长籽晶 快速生长 集成化 

分 类 号：O782[理学—晶体学]