Dynamic nonlinear effect on lasing in a random medium

被引：28
|
作者：
Liu, B [1 ]
Yamilov, A [1 ]
Ling, Y [1 ]
Xu, JY [1 ]
Cao, H [1 ]
机构：
[1] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 06期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevLett.91.063903
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have studied both experimentally and numerically 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 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 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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页数：4
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