摘要
对BBO晶体内的非均匀温度场进行了理论研究。通过对腔内BBO晶体工作特点的 分析,建立了切合实际的矩形截面晶体热模型。考虑了谐振腔内的基频光束具有高斯分布的 特点,同时晶体具有周边恒温冷却、端面绝热等特征,利用热传导方程得到了BBO晶体处于基 频光偏心辐射下温度场的解析表达式,同时分析了影响晶体温度场分布的各种因素。偏心辐 射矩形截面晶体温度场的研究是对于倍频晶体处于一般工作情况的讨论,对于解决晶体由于 倍频的位相失配,提高激光器的倍频转换效率具有指导作用。
The non-uniform temperture field of BBO crystal was theoretically researched. Through the working characteristic analysis of BBO crystal as intracavity doubling frequency, the thermal model of rectangle-section crystal according to actual situation was bulit. In the model some characteristics such as fundamental-frequency laser in resonate having the Gauss distribution, the nonlinear optical crystal having constant peripheral temperature and the end-face under the adiabatic condition were considered. Based on heat conductive equation, temperature field distribution of the BBO crystal under off-centering radiation of fundamental frequency laser was obtained. Some relevant factors, which would influence crystal temperature field distribution, were analyzed. The research of rectangle-section crystal temperature field under off-centering radiation is a general discussion of doubling frequency crystal in common used. Research will be theoretically established for solve the problem of phase mismatch, and play instructive effects at improvement of the doubling-frequency conversion efficiency of laser.
出处
《激光与红外》
CAS
CSCD
北大核心
2005年第12期919-922,共4页
Laser & Infrared
基金
陕西省教育厅专项科研项目(No.04JK129)。
关键词
激光器
腔内倍频
矩形截面晶体
偏心辐射
温度场
lasers
intracavity doubling frequency
the rectangle-section crystal
off-centering radiation
temperature field distribution
