Creation of new lasing modes with spatially nonuniform gain

被引：18

作者：

Andreasen, Jonathan ^{[1
,2
]}

Cao, Hui ^{[1
,3
]}

机构：

[1] Yale Univ, Dept Appl Phys, New Haven, CT 06520 USA

[2] Northwestern Univ, Dept Phys & Astron, Evanston, IL 60208 USA

[3] Yale Univ, Dept Phys, New Haven, CT 06520 USA

来源：

OPTICS LETTERS | 2009年 / 34卷 / 22期

基金：

美国国家科学基金会;

关键词：

DIRECTIONAL EMISSION; RANDOM LASER; MICROLASERS; RESONANCE; MEDIA;

D O I：

10.1364/OL.34.003586

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on the creation of new lasing modes with spatially nonuniform profiles of optical gain in a one-dimensional random structure. It is demonstrated numerically that even without gain saturation and mode competition, the spatial nonuniformity of gain can cause dramatic and complicated changes. New lasing modes appear with frequencies between those of the lasing modes with uniform gain. We examine new modes in detail and find that they exhibit high output directionality. Our results show that random lasing properties may be modified significantly without changing the underlying structure. (C) 2009 Optical Society of America

引用

收藏

页码：3586 / 3588

页数：3

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