Nonlinear coupling of transverse modes in quantum cascade lasers

被引：4
|
作者：
Wojcik, Aleksander K. [1 ]
Yu, Nanfang [2 ]
Diehl, Laurent [2 ]
Capasso, Federico [2 ]
Belyanin, Alexey [1 ]
机构：
[1] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 USA
[2] Harvard Univ, Sch Engn & Appl Sci, Cambridge, MA 02138 USA
来源：
OPTICAL ENGINEERING | 2010年 / 49卷 / 11期
关键词：
nonlinear optics; quantum cascade lasers; phase coherence; mode locking; GENERATION; INSTABILITIES; PATTERNS; OPTICS;
D O I：
10.1117/1.3498773
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We study the multimode operation regimes of midinfrared quantum cascade lasers (QCLs), taking into account nonlinear phase-sensitive interactions between transverse modes. We show the possibility of the coherent coupling of several transverse modes, which results in a number of interesting effects including frequency and phase locking between transverse modes, bistability, and beam steering. We present an analytical model for the modal dynamics and its numerical analysis. Effects of amplitude and phase fluctuations on the modal stability are explored. The theoretical results are in agreement with our experimental measurements of buried heterostructure QCLs. (C) 2010 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3498773]
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页数：10
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