光学学报, 2002, 22 (8): 921, 网络出版: 2006-08-08
准相位匹配扇形光栅铌酸锂光波导倍频绿光输出
Fan-out Grating Quasi-Phase-Matched Second Harmonic Generation in LiNbO3 Waveguide
铌酸锂 光波导 准相位匹配 倍频 扇形光栅 周期性极化铌酸锂(PPLN) LiNbO3 optical waveguide quasi-phase-matched second harmonic generation fan-out grating periodically poled lithium niobate (PPLN)
摘要
采用外加电场极化方式对具有扇形光栅的0.5 mm厚Z切铌酸锂晶体进行极化反转,制成了退火质子交换光波导.极化反转周期为5.8 μm~6.2 μm,采用Nd:YAG激光器输出的1.064 μm连续激光为基频光波,实现了0.532 μm倍频绿光输出,相互作用长度为4 mm,耦入波导的基频光波功率为10 mW,获得了20 μW的绿色倍频光输出,归一化转换效率为125%/(W?cm2).
Abstract
The quasi phase matched second harmonic generation in periodically poled lithium niobate (PPLN) Z cut 0.5 mm thick annealed proton exchanged (APE) waveguide with fan grating was realized by applying an external field poling. The grating period ranges inverted from 5.8 μm~6.2 μm and the interaction length was 4 mm. Used a CW Nd:YAG laser as a fundamental beam source at 1.064 μm, input power in waveguide was 10 mW. The green SHG of 20 μW at 0.532 μm was achieved at 125%/(W·cm 2) normalized conversion efficiency in PPLN waveguide.
于建, 薛挺, 杨天新, 耿凡, 纪磊, 李世忱. 准相位匹配扇形光栅铌酸锂光波导倍频绿光输出[J]. 光学学报, 2002, 22(8): 921. 于建, 薛挺, 杨天新, 耿凡, 纪磊, 李世忱. Fan-out Grating Quasi-Phase-Matched Second Harmonic Generation in LiNbO3 Waveguide[J]. Acta Optica Sinica, 2002, 22(8): 921.