Gain-enhanced optical coherence in a high optical gain semiconductor

被引：2
|
作者：
Vasil'ev, Peter P. [1 ,2 ]
White, Ian H. [1 ]
机构：
[1] Univ Cambridge, Ctr Photon Syst, Dept Engn, Cambridge CB3 0FA, England
[2] PN Lebedev Phys Inst, Moscow 119991, Russia
来源：
PHYSICS LETTERS A | 2012年 / 376卷 / 33期
基金：
英国工程与自然科学研究理事会;
关键词：
SUPERFLUORESCENCE; SUPERRADIANCE; LASERS;
D O I：
10.1016/j.physleta.2012.05.041
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The propagation of ultrashort pulses in a traveling wave semiconductor amplifier is considered. It is demonstrated that the effective polarization relaxation time, which determines the coherence of the interaction of pulses within the medium, strongly depends on its optical gain. As a result, it is shown that at large optical gains the coherence time can exceed the transverse relaxation time T-2 by an order of magnitude, this accounting for the strong femtosecond superradiant pulse generation commonly observed in semiconductor laser structures. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：2270 / 2273
页数：4
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