PPLN倍频效率与温度关系分析  

Temperature Dependence of the Second Harmonic Generation in Periodically Poled LiNbO_3 Crystal

作　　者：桑梅[1] 薛挺[2] 于建[2] 倪文俊[2] 纪磊[2] 李世忱[2] 

机构地区：[1]天津大学理学院,天津300072 [2]天津大学精密仪器与光电子工程学院

出　　处：《光电子．激光》2002年第4期343-348,共6页Journal of Optoelectronics·Laser

基　　金：天津市重点自然科学基金资助项目 (批准号 993 80 0 71)

摘　　要：本文研究了准位相匹配周期性极化反转铌酸锂 (PPL N)晶体的体器件倍频特性与晶体温度的关系 ,从准相位匹配位相失配关系出发 ,推导了 PPL N光栅周期和倍频效率的表达式 ,并考虑到铌酸锂晶体的热膨胀因素 ,给出了温度调谐带宽精确表达式。理论分析与已有实验结果进行了比较 。By considering the sensitivity of the refractive index to the temperature in PPLN and the thermal expansion character of the LiNbO3 crystal, the grating period expression and the temperature dependency characterization of quasi-phase-matched second harmonic generation (QPM-SHG) bulk devices fabricated in Z-cut LiNbO3crystal are theoretically analyzed. The results show that the maximum conversion efficiency of SHG can be obtained by tuning the temperature in the PPLN to approach the center temperature. The relations between the temperature tuning bandwidth and the interactive length and the fundamental wavelength are also given. The theoretical results fit well to many author's experimental achievements.

关 键 词：倍频效率 温度关系分析 周期极化铌酸锂 晶体 

分 类 号：O734[理学—晶体学]