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期刊论文
Time-Resolved Femtosecond Degenerate Four-Wave Mixing in LiNb03:Fe.Mg Crvstal *
ZHANG Xin-zheng et al. Vol.22, no.11 (2005) 2831-2833，-0001，（）：
Forward degenerate four-wave mixing (DFWM) processes are investigated with a femtosecond pulsed laser in lithium niobate crystal doub/y-doped with magnesium and iron (LiNb03: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 x 10-13 esu. The time-resolved DFWM process shows a response time of X(3) shorter than lOOfs, which is due to the nonresonant electronic nonlinearities. Our results indicate that LiNb03 crystals have potentials for ultrafast real-time optical processing systems, which require a large and fast X(3) optical nonlinearitrr.
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