Multi-color laser generation in periodically poled KTP crystal with single period  

作　　者：牛素俭 周志远 程静欣 葛正 杨琛 史保森 Sujian Niu;Zhiyuan Zhou;Jingxin Cheng;Zheng Ge;Chen Yang;Baosen Shi(CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China;Synergetic Innovation Center of Quantum Information&Quantum Physics,University of Science and Technology of China,Hefei 230026,China;Science and Technology on Electro-Optical Information Security Control Laboratory,Tianjin 300308,China)

机构地区：[1]CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei 230026,China [2]Synergetic Innovation Center of Quantum Information&Quantum Physics,University of Science and Technology of China,Hefei 230026,China [3]Science and Technology on Electro-Optical Information Security Control Laboratory,Tianjin 300308,China

出　　处：《Chinese Optics Letters》2023年第2期76-80,共5页中国光学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.92065101 and 11934013);the Space Debris Research Project of China(No.KJSP2020020202)。

摘　　要：Frequency conversion based on three-wave mixing is a critical nonlinear optic application,extending the frequency range of existing lasers and realizing frequency-transduced detectors in a wavelength range that lacks an effective detector.Phase matching is vital for effective frequency conversion.The advantages of quasi-phase matching(QPM)over birefringent phase matching are a lack of walk-off effect,a maximum nonlinear coefficient,and phase matching in the entire transparency window.Herein,using different types and orders of QPM,four kinds of effective frequency doubling processes are realized in a periodically poled potassium titanyl phosphate(KTP)crystal with a single period,and three kinds of frequency doubling processes are experimentally verified.We also show a feasible way to construct an RGB color generator based on two different QPM processes.This study significantly expands the feasible frequency conversion of existing lasers to different wavelengths,providing an effective method for multi-color laser generation based on periodically poled KTP crystals.

关 键 词：nonlinear optics frequency doubling multi-color laser quasi-phase matching 

分 类 号：TN248[电子电信—物理电子学] O734[理学—晶体学]