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Time-Resolved Femtosecond Degenerate Four-Wave Mixing in LiNbO3:Fe,Mg Crystal
引用本文:王振华 张心正 许京军 吴强 乔海军 唐柏权 RUPP Romano 孔勇发 陈绍林 黄自恒 李冰 刘仕国 张玲.Time-Resolved Femtosecond Degenerate Four-Wave Mixing in LiNbO3:Fe,Mg Crystal[J].中国物理快报,2005,22(11):2831-2833.
作者姓名:王振华  张心正  许京军  吴强  乔海军  唐柏权  RUPP  Romano  孔勇发  陈绍林  黄自恒  李冰  刘仕国  张玲
作者单位:[1]Photonics Research Center, Institute of Physical Science, Nankai University, Tianjin 300071 [2]Ultrafast Photonics Laboratory, Teda Applied Physics School, Nankai University, Tianjin 300457 [3]Institute of Experimental Physics, Vienna University, A-1090 Wien, Austria [4]R&D Center for Photon-Electro Materials, Nankai University, Tianjin 300071
基金项目:Supported by the National Natural Science Foundation of China under Grant No 60208003, and Alexander yon Humboldt Foundation.
摘    要:Forward degenerate four-wave mixing (DFWM) processes are investigated with a femtosecond pulsed laser in lithium niobate crystal doubly-doped with magnesium and iron (LiNbO3:Fe, Mg). The pulse energy dependence reveals a pure third-order nonlinear response, and the third-order nonlinear susceptibility x^(3) in the material is evaluated to be 4.96 × 10^-13 esu. The time-resolved DFWM process shows a response time of x^(3) shorter than 100fs, which is due to the nonresonant electronic nonlinearities. Our results indicate that LiNbO3 crystals have potentials for ultrafast real-time optical processing systems, which require a large and fast x^(3) optical nonlinearity.

关 键 词:LiNbO3:Fe  Mg  晶体化合物  退化波混合  脉冲激光  脉冲能量
收稿时间:2005-07-06
修稿时间:2005-07-06
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