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Proceedings Paper

Mixed transverse modes in coupled-cavity VCSELs
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Paper Abstract

We present experimental results showing alternating lasing and non-lasing regions for the short-wavelength longitudinal mode in a GaAs-based 850 nm coupled-cavity vertical-cavity surface-emitting laser (CC-VCSEL). These regions are situated between the laser threshold and roll-off for this mode. The analyzed structure consists of two identical AlGaAs cavities with GaAs quantum wells, separated with 11.5 pairs of middle DBR. The current apertures are realized by ion-implantation for the top cavity and selective oxidation for the bottom cavity. We then perform fully-vectorial three-dimensional cold-cavity optical simulations to theoretically investigate optical density radial and on-optical-axis profiles of the first order transverse modes corresponding to the two longitudinal modes. We show that the short-wavelength fundamental mode λS-LP01 is subject to periodic changes of its optical field distribution when changing the oxide aperture radius, which can lead to weaker resonance of the short-wavelength LP01 mode within the coupled cavity structure.

Paper Details

Date Published: 28 April 2016
PDF: 7 pages
Proc. SPIE 9892, Semiconductor Lasers and Laser Dynamics VII, 989221 (28 April 2016); doi: 10.1117/12.2227845
Show Author Affiliations
Leszek Frasunkiewicz, Lodz Univ. of Technology (Poland)
Vrije Univ. Brussel (Belgium)
Tomasz Czyszanowski, Lodz Univ. of Technology (Poland)
Kent Choquette, Univ. of Illinois at Urbana-Champaign (United States)
Krassimir Panajotov, Vrije Univ. Brussel (Belgium)
Institute of Solid State Physics (Bulgaria)

Published in SPIE Proceedings Vol. 9892:
Semiconductor Lasers and Laser Dynamics VII
Krassimir Panajotov; Marc Sciamanna; Angel Valle; Rainer Michalzik, Editor(s)

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