LBO的腔内倍频特性研究  

Intracavity frequency doubling characteristic of LBO

作　　者：蔡添志[1] 许惠英[2] 王晓忠[2] 黄朝红[2] 石梦静[1] 庄昌辉[1] 蔡志平[2] 

机构地区：[1]厦门大学物理系,福建厦门361005 [2]厦门大学电子工程系,福建厦门361005

出　　处：《红外与激光工程》2007年第z1期339-342,共4页Infrared and Laser Engineering

基　　金：福建省科技计划重大项目(2004HZ01-1-3);厦门大学科技创新项目(XDKJCX20041003)

摘　　要：从倍频转换效率公式和腔内倍频的稳定态条件出发,得到倍频波的功率密度公式,进而得出倍频晶体最佳长度和倍频波最大功率密度的表达式。以LBO晶体Ⅰ类临界相位匹配腔内倍频946 nm为例,根据倍频波的功率密度公式,从理论上讨论了LBO长度、功率密度比对倍频波功率密度的影响,为LBO倍频产生473 nm蓝光实验提供了理论指导。虽然这里只是讨论了LBOⅠ类临界相位匹配倍频946 nm,但对所有腔内倍频实验(不同倍频晶体或不同倍频频率)具有借鉴作用。By the use of the formula for SHG conversion efficiency and the steady-state condition for intracavity frequency doubling,the expression for second-harmonic power density was obtained,and then the optimum length of the nonlinear crystal and the maximum second-harmonic power density were calculated.Taking LBO(cut for type-I critical phase matching) intracavity frequency doubling 946 nm as an example,how second-harmonic power density changing with the length of LBO and the ratio of power densities were discussed,which can conduct us well in the 473 nm blue laser experiment,and is of important reference for all the intracivity frequency doubling experiments(different non-linear crystal or different doubling frequency).

关 键 词：腔内倍频 LBOl I类临界相位匹配 

分 类 号：O437[机械工程—光学工程]