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Dynamic Nonlinear Effect on Lasing in a Random Medium

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arxiv cond-mat/0301427 v1 pith:MBQGSLVE submitted 2003-01-23 cond-mat.dis-nn

Dynamic Nonlinear Effect on Lasing in a Random Medium

B. Liu , A. Yamilov , Y. Ling , J.Y. Xu , H. Cao This is my paper
classification cond-mat.dis-nn
keywords lasinglasernonlinearitymediummodenonlinearchangesdynamic
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We have studied the dynamic effect of nonlinearity on lasing in disordered medium. The third-order nonlinearity not only changes the frequency and size of lasing modes, but also modifies the laser emission intensity and laser pulse width. When the nonlinear response time is comparable to or longer than the lifetime of the lasing mode, the nonlinearity changes the laser output through modifying the size of the lasing mode. When the nonlinear response is much faster than the buildup of the lasing mode, positive nonlinearity always extracts more laser emission from the random medium due to the enhancement of single particle scattering.

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