脉冲可调谐钛宝石激光向短波长扩展的研究  

Study on the Method of Expanding thde Ti∶Sapphire Laser Spectrum to Short Wavelength by Using Sum-frequency Mixing Technology in KTP Crystal

作　　者：朱孟[1] 丁欣[2] 于意仲[1] 吕卫[1] 王鹏[1] 姚建铨[1] 

机构地区：[1]天津大学激光与光电子研究所,天津300072 [2]南开大学物理科学学院光子学中心教育部光电信息技术科学开放实验室,天津300071

出　　处：《天津大学学报（自然科学与工程技术版）》2002年第1期58-62,共5页Journal of Tianjin University：Science and Technology

摘　　要：对利用和频技术将脉冲钛宝石激光向短波长方向扩展的可能性进行了研究 .在仔细分析了脉冲钛宝石激光器结构的基础上 ,确定了用 KTP晶体实现钛宝石激光与倍频后剩余的 Nd∶ YAG激光和频的方案 .实验中选用两块 KTP作为和频晶体 ,切割角度分别为 θ=85°,φ=90°和 θ=76°,φ=90°,采用 (A)类相位匹配方式 ,获得了 45 9.3～ 5 0 9.6 nm的和频光 ,最大转换效率为 15 .2 % ,最大输出能量为 14.6 m J(在 46 3nm处 )The method and practicability of employing the sum frequency mixing (SFM) technology to expand the Ti∶sapphire laser spectrum to shorter wavelength is proposed and proved.On the basis of Ti∶sapphire laser construction,KTP is determined as the optimal crystal of SFG of Ti∶sapphire laser and Nd∶YAG laser which pass through the SHG crystal.Using two KTP crystals with cutting angles being θ=85°,φ=90°and θ=76°,φ=90°,respectively under type Ⅱ(A) phase matching condition,the wavelength range of 459.3~509.6 nm is obtained experimentally with maximum conversion efficiency 15.2% and maximum output energy 14.6 mJ at 463 nm.

关 键 词：钛宝石激光器 和频 相位匹配条件 KTP晶体 切割角度 转换效率 光波长 

分 类 号：TN248.1[电子电信—物理电子学]