准相位匹配PPKTP极化反转的监测  

Poling Process Monitor of PPKTP Fabrication

作　　者：桑梅[1] 于建[1] 任铁雄[1] 倪文俊[1] 付伟佳[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天津大学光电信息科学技术教育部重点实验室,天津300072 [2]中非人工晶体研究院,北京100018

出　　处：《天津大学学报》2006年第B06期164-167,共4页Journal of Tianjin University(Science and Technology)

基　　金：国家自然科学基金(60377018).

摘　　要：文中提出了采用电光效应实时监测判断KTiOPO_4(KTP)晶体周期性极化反转进程的实验方案,分析了在高压电场极化脉冲作用下,KTP晶体的电光效应的基本特性和极化电流所表现出来的峰值特性,以及它们与KTP晶体的铁电畴反转之间存在的依赖关系,并确定了用监控光强的变化来判断极化反转程度的基本依据,在监测系统的帮助下对熔盐法生长的KTP晶体进行了极化反转．最后对获得的PPKTP进行了化学蚀刻,结果表明,获得的PPKTP质量有了明显提高．倍频转换效率达到1．13%．A real - time monitoring system is introduced to scale the reverse poling process of periodically poled KTiOPO4 （PPKTP） crystal by applying the electric - optical effect. Both the basic electric - optical characteristics of KTP crystal and peak performance of the poling currency are analyzed under the function of high voltage pulses tioned . Furthermore, the dependence relationship between the domain reverse of PPKTP and these factors menabove are illustrated as a judgment of scaling the process of poling. Under the action of this monitoring system, the PPKTP crystals are poled in the experiment. The etched surfaces indicate that the qualities are enhanced and the efficiency of SHG is 1.13%, better than before.

关 键 词：准相位匹配 极化 周期性极化反转KTP晶体(PPKTP) 电光效应 

分 类 号：O437.1[机械工程—光学工程]