输出镜反射性对Ⅱ类相位匹配倍频效率的影响  

Influence of the polarization dueing to the output mirror on the efficiency of Ⅱ-type non critical phase match

作　　者：石梦静[1,2] 王晓忠[2] 陈巧玲[1] 

机构地区：[1]福建工程学院数理系,福州350000 [2]厦门大学电子工程系,福建厦门360005

出　　处：《光学技术》2009年第4期549-550,554,共3页Optical Technique

基　　金：福建省科技计划重大项目(2004HZ01-1-3)

摘　　要：研究了V型腔Nd∶YVO4/KTP绿光激光器中的输出镜反射相移的产生原因。结合Ⅱ类相位匹配KTP倍频晶体的倍频特性,首次分析了反射相移对腔内基频光偏振特性及Ⅱ类相位匹配倍频效率的影响。结果发现:当反射相移△在0～π范围内变化时,倍频效率随△的增大而降低;当△<2°时,倍频效率相对于理想情况下降幅度很小,可忽略不计。利用矩阵法对输出镜多层膜特性进行了分析,通过合理控制入射角度,减小了反射相移,提高了激光器的倍频效率。Effect of the polarization characteristics of the output mirror coating of a V-shaped cavity green diode pumped solid-state laser with Ⅱ -type non critical phase match is presented. Theoretical result .shows that due to the output mirror, the reflection-induced phase shift of the coating can cause a decrease of the efficiency of frequency doubling. But when the reflectioninduced retardaney is less than 2°, relative to the ideal state, the efficiency of frequency doubling changes very little, and can be neglected. The efficiency of frequency doubling is improved by controlling the angle of incidence reasonably to reduce the reflection-induced retardancy. The result also has some reference to four-mirror formed fold-cavity structure and ring resonator.

关 键 词：偏振 倍频效率 相位偏移 Ⅱ类相位匹配 

分 类 号：TN248[电子电信—物理电子学]