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Optical Engineering

Nonlinear coupling of transverse modes in quantum cascade lasers
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Paper Abstract

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.

Paper Details

Date Published: 1 November 2010
PDF: 10 pages
Opt. Eng. 49(11) 111114 doi: 10.1117/1.3498773
Published in: Optical Engineering Volume 49, Issue 11
Show Author Affiliations
Aleksander K. Wojcik, Texas A&M Univ. (United States)
Nanfang Yu, Harvard Univ. (United States)
Laurent Diehl, Harvard Univ. (United States)
Federico Capasso, Harvard Univ. (United States)
Alexey A. Belyanin, Texas A&M Univ. (United States)

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