1.5μm外腔式Ba(NO_3)_2人眼安全拉曼激光器  

An Eye-safe Extra Cavity Raman Laser in 1.5μm With a Ba(NO_3)_2 Crystal

作　　者：王旭葆[1] 牛霞[1] 王小磊[1] 曲波[1] 王泽宇[1] 宋冬冬[1] 米庆改[1] 李姣[1] 

机构地区：[1]北京工业大学激光工程研究院,北京100124

出　　处：《应用激光》2016年第2期211-214,共4页Applied Laser

摘　　要：以1.34μm脉冲激光为基频光,Ba(NO_3)_2晶体作为拉曼晶体,通过一阶受激拉曼散射效应,产生1.56μm一阶Stokes人眼安全激光的外腔拉曼激光器。基频光由以准连续激光二极管(LD)侧面泵浦Nd:YAP(掺钕铝酸钇)晶体,BBO(偏硼酸钡)晶体电光主动调Q产生。运用ABCDEF扩展矩阵论,使用RP Resonator软件计算光束半径随腔内位置的变化,设计腔内元件位置,提高拉曼转换效率。通过实验,得到波长为1 344nm,重复频率为20Hz,脉宽为38ns,单脉冲能量为19.2mJ时,产生1 562nm波长的一阶Stokes光,最大单脉冲能量为1.83mJ,脉宽为9ns,基频光到一阶拉曼光的最大光光转换效率约为15.24%,转换效率随着基频光脉冲能量的大小先增加后减小。An eye-safer extra cavity first-Stokes eye-safer laser with a Ba（NO3）2crystal is reported.The basic laser in 1.34μm is pumped by a side-diode actively-Q with Nd：YAP crystal.In order to design the most efficiency,an extended ABCDEF algorithm has been implemented in the RP Resonator software to calculate the beam radius in the cavity.The conversion efficiency from basic laser to Raman laser is increased and the decreased by the increased of the energy of basic laser.The highest conversion efficiency is 15.24%.Under the basic pulse energy of 19.2mJ at 1 344 nm and pulse width of 38 ns at the pulse repetition frequency of 20 Hz,a steady firstStokes Raman laser at 1 562 nm with the output energy of 1.83 nJ and pulse width of 9ns is achieved.

关 键 词：激光技术 外腔拉曼技术 人眼安全激光 RP Resonator软件光学解析 Ba(NO3)2晶体 

分 类 号：O437.3[机械工程—光学工程]