光纤激光器泵浦PPKTP晶体倍频连续绿光输出  

CW SHG From-Laser Pumped Bulk PPKTP

作　　者：桑梅[1] 于建[1] 倪文俊[1] 纪磊[1] 李世忱[1] 胡永岚 师瑞泽 

机构地区：[1]天津大学精密仪器与光电子工程学院教育部光电信息科学技术重点实验室,天津300072 [2]中非人工晶体研究院,北京100018

出　　处：《光电子．激光》2004年第7期763-765,共3页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60377018);教育部科学技术研究重点资助项目

摘　　要：用离子交换法降低了磷酸氧钛钾(KTP)晶体的电导率,用高压电场极化反转成功获得了体积为4mm×6mm×1mm,周期为Λ=9.0μm的周期极化KTP(PPKTP)晶体。在倍频(SHG)光学系统中用包层泵浦的光纤激光器输出的1064nm激光作为泵浦光,在室温下得到PPKTP器件的最高SHG转换效率为0.32%,归一化SHG效率为2 4%。化学蚀刻表面显示这种方法获得的PPKTP晶体反转畴边缘整齐,没有明显的畴壁扩展现象。Several 1 mm thick KTiOPO4 (KTP) samples were fabricated by high-electric-field-poling approach after ion-exchange and standard photolithographic pretreatment. By introducing fiber laser pumping into the optical test scheme, we obtained higher conversion efficiency of SHG than before. The sample was 4 mm × 6 mm × 1 mm with Λ=9.0 μm grating period for the first order quasi-phase matched SHG of 1064 nm fundamental wavelength at room temperature. The SHG efficiency was 0.32% and the highest normalized efficiency was 2.4%. The etched surface photograph reveals that the fringes of reversed domain in PPKTP got by this approach are quite uniform and no obvious domain wall broadening.

关 键 词：准相位匹配 PPKTP 光纤激光器 倍频 连续绿光输出 

分 类 号：TN248[电子电信—物理电子学]