Dynamic Nonlinear Effect on Lasing in a Random Medium

Details Dynamic Nonlinear Effect on Lasing in a Random Medium Dynamic Nonlinear Effect on Lasing in a Random Medium

2003-01-23

arxiv.org/abs/cond-mat/0301427v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

12 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.91.063903

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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