级联二阶非线性铌酸锂全光开关的研制  

The Study of All-Optical Switching of LiNbO_3 Based on Cascading of Second-Order Nonlinearity

作　　者：陈云琳[1] 刘晓娟[1] 郭娟[1] 楼慈波[1] 陈绍林[1] 许京军[1] 张光寅[1] 

机构地区：[1]南开大学物理科学学院,天津300071

出　　处：《光学学报》2004年第12期1667-1671,共5页Acta Optica Sinica

基　　金：国家自然科学基金(1017404;90101022)天津市重点自然科学基金(033800111)天津市国际合作项目资助课题

摘　　要：以基于准位相匹配和频与差频级联二阶非线性[x(2):x(2)]基础上的全光开关的理论分析作指导,进行了周期极化铌酸锂晶体(PPLN)和退火质子交换光波导(APE)的实验制备,利用所研制的PPLN-APE器件,以自行研制的工作波长为1.54μm的被动调Q掺钴铝酸镁激光器作为控制光源,以工作波长为1.5μm的连续二极管激光器为信号光源进行了级联二阶非线性全光开关实验。当控制光峰值功率为3kW,信号光功率为1mW时,实现13％的开关效率,分析了进一步提高全光开关性能的途径。Based on the theoretical analysis of cascading of sum frequency-generation and difference-frequency-generation processes [x(2): x(2)] under quasi-phase-matching conditions, periodically poled lithium niobate (PPLN) and annealed-proton-exchanged waveguide (APE) were fabricated. Using the fabricated crystal of PPLN-APE, an all-optical switching experiment is carried out. The control pulse is generated by a Q-switched Co2+-doped MgAl2O4 laser with a wavelength of 1.54 μm. The CW signal beam is generated by a laser diode with wavelength of 1.5 μm. When the control pulse intensity reached 3 kW and the CW signal intensity reached 1 mW, the all-optical switching realized a switching efficiency of 13% . In the conclusion, the key technologies to improve the switching properties further is discussed.

关 键 词：非线性光学 全光开关 退火质子交换 铌酸锂晶体 准相位匹配 

分 类 号：TN256[电子电信—物理电子学]