周期极化铌酸锂中通信波段纠缠双光子的波长管理方法(英文)  

Wavelength Management Method of Telecommunication-Band Polarization-Entangled Twin Photons in Periodically Poled Lithium Niobate Crystals

作　　者：高士明[1] 

机构地区：[1]浙江大学光及电磁波研究中心

出　　处：《光子学报》2007年第5期820-824,共5页Acta Photonica Sinica

基　　金：Supported by the Postdoctoral Science Foundation of China(2005037007)

摘　　要：理论研究了周期极化铌酸锂晶体中通过自发参量下转换产生的纠缠双光子的波长管理方法.简并自发参量下转换产生的单色偏振纠缠双光子的波长,可以通过调整晶体的极化周期或工作温度自由地调节,特别是在加工好的晶体中极化周期是确定的,因而调整晶体的工作温度更加便捷.对于双色偏振纠缠双光子来说,不需改变入射的泵浦光以及晶体的极化结构,仅通过调节晶体的工作温度就可以实现o光光子和e光光子波长的严格交换.The wavelength management method was theoretically investigated for the polarizationentangled twin photons in telecommunication band generated by type-Ⅱ quasi-phase-matched （QPM） spontaneous parametric down-conversion （SPDC） in periodically poled lithium niobate （PPLN） crystals. The wavelength of single-color twin photons from degenerate SPDC can be controlled freely through adjusting the QPM grating period or the working temperature. Especially, adjusting the temperature is more convenient since the QPM grating period is hardly changed once the PPLN structure is fabricated. For the two-color twin photons created by nondegenerate SPDC, strict wavelength exchange of the o-polarization and the e-polarization photons can be realized easily only by tuning the working temperature without pump or structure change.

关 键 词：光参量器件 偏振纠缠光子对 自发参量下转换 波长管理 

分 类 号：O437.4[机械工程—光学工程]