Dynamics of a random laser above threshold

被引：62

作者：

van Soest, G ^{[1
]}

Poelwijk, FJ ^{[1
]}

Sprik, R ^{[1
]}

Lagendijk, A ^{[1
]}

机构：

[1] Univ Amsterdam, Van der Waals Zeeman Inst, NL-1018 XE Amsterdam, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 86卷 / 08期

关键词：

D O I：

10.1103/PhysRevLett.86.1522

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have performed enhanced backscattering experiments in a high gain random laser, under circumstances where a stationary theory predicts the laser intensity to diverge. Above the laser threshold the observed backscatter cone changes only gradually, not showing any signs of the divergence. We present measurements and theory-generalized laser equations with a diffusive transport term for pump and laser light-to explain the observed behavior. The population dynamics prevent an indefinite growth of the intensity. Time dependence is essential for a theory of random lasers above the laser threshold.

引用

页码：1522 / 1525

页数：4

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