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准相位匹配级联二阶非线性全光波长转换研究
引用本文:罗勇锋,陈云琳,袁建伟,张万林,郭娟,陈绍林,许京军,张光寅.准相位匹配级联二阶非线性全光波长转换研究[J].光学学报,2005,25(5):51-654.
作者姓名:罗勇锋  陈云琳  袁建伟  张万林  郭娟  陈绍林  许京军  张光寅
作者单位:1. 南开大学物理科学学院,弱光非线性光子学材料先进技术及制备教育部重点实验室,天津,300071;山东大学晶体材料国家重点实验室,济南,250100
2. 南开大学物理科学学院,弱光非线性光子学材料先进技术及制备教育部重点实验室,天津,300071
基金项目:国家自然科学基金(10174040,90101022),天津市重点自然科学基金(033800111),天津市国际合作项目,晶体材料国家重点实验室开放项目资助课题。
摘    要:对基于级联和频差频非线性效应铌酸锂光波导新型全光波长转换器进行了理论研究。这种新型波长变换器需要两束抽运光源,它将输入的抽运光波长置于信号光波段窗口的两边,抽运光波长与信号光波长相近容易实现最佳耦合又不会占用信号波段,而且具有偏振不敏感的优点。从建立级联和频差频铌酸锂光波导全光波长转换器的理论模型出发,给出了波导中光相互作用的耦合模方程;利用逐步法详细推导了耦合模方程的解,得出了物理意义清晰的转换光功率表达式,分析了非线性晶体相互作用长度、抽运光功率对转换效率的影响,为级联和频差频铌酸锂光波导全光波长转换器优化设计提供了理论依据。

关 键 词:非线性光学  全光波长转换器  级联和频差频  准相位匹配
收稿时间:2004/6/3

Study of Quasi-Phase-Matched Cascaded x(2) All-Optical Wavelength Conversion
Luo Yongfeng,Chen Yunlin,Yuan Jianwei,Zhang Wanlin,GUO Juan,Chen Shaolin,XU Jingjun,ZHANG Guangyin.Study of Quasi-Phase-Matched Cascaded x(2) All-Optical Wavelength Conversion[J].Acta Optica Sinica,2005,25(5):51-654.
Authors:Luo Yongfeng  Chen Yunlin  Yuan Jianwei  Zhang Wanlin  GUO Juan  Chen Shaolin  XU Jingjun  ZHANG Guangyin
Abstract:A novel all-optical wavelength conversion (AOWC) based on the cascaded sum frequency generation (SFG) and difference frequency generation (DFG) in LiNbO3 waveguides have been theoretically studied. This novel wavelength convertor employing two pump sources places the two input pump wavelengths outside the optical communication band. It is easily realize optimum coupling between punp wavelengths and signal wavelength since their wavelengths are relatively close to each other and the pump wavelenths do not occupy the communication band and the convertor has a characteristic of polarization-insensitive. The theoretical model of the AOWC is established and the coupled-mode equations of optical interaction in waveguide are given out. Then the solutions of coupled-mode equations are in detail deduced step by step and an electric field expression of clear physical insight is obtained. The effects of the device length and the pump powers on the conversion efficiency are analyzed, and it offers theoretical foundation for the optimum frabrication parameters for stable and highly efficient AOWC.
Keywords:nonlinear optics  all-optical wavelength conversion  cascaded sum frequency generation and difference frequency generation  quasi-phase-matching
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