量子光学学报, 2011, 17 (2): 119, 网络出版: 2011-07-25
理论构造周期极化KTiOPO4晶体制备852和1550 nm双色纠缠光
Design of the Periodically Poled KTiOPO4 Generating852 and 1550 nm Bicolor Entangled Lights
准相位匹配 周期极化晶体 光学参量振荡 双色纠缠 quasi phase matching periodically poled crystal optical parametric oscillator bicolor entanglement
摘要
利用KTiOPO4(KTP)材料非线性系数d33对应的二阶非线性0-类准相位匹配，理论上设计构造了一种周期极化KTiOPO4晶体(PPKTP)，当晶体温度为20℃时，晶体准相位匹配格子的周期为10.70 μm。波长为550 nm的激光泵浦由该晶体组成的光学参量振荡器能产生含852 nm信号光和1550 nm的闲置光的双色纠缠，其中信号光对应 Cs原子吸收线，闲置光1550 nm对应光纤通讯波长。该纠缠光对量子信息网络和原子信息存储有非常重要的意义。
Abstract
In this paper, we theoretically design the second-order nonlinear periodically poled KTiOPO4 crystal (PPKTP) by the 0-type quasi phase matching of nonlinear coefficients d33. The period of PPKTP is 10.7 microns at 20 centigrade degree. The bicolor entanglement of 852 nm signal light and 1550 nm idle light can be generated when an optical parametric oscillator of the PPKTP is pumped by 550 nm light. One of entangled beams corresponds to Cs atomic transition line, the other corresponds to optical fiber communication wavelength. The entanglement is of importance for the quantum information network and atomic information storage.
杨荣国, 孙恒信, 张俊香, 郜江瑞. 理论构造周期极化KTiOPO4晶体制备852和1550 nm双色纠缠光[J]. 量子光学学报, 2011, 17(2): 119. YANG Rong-guo, SUN Heng-xin, ZHANG Jun-xiang, GAO Jiang-rui. Design of the Periodically Poled KTiOPO4 Generating852 and 1550 nm Bicolor Entangled Lights[J]. Acta Sinica Quantum Optica, 2011, 17(2): 119.
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