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Proceedings Paper

Tunable room-temperature continuous-wave mid-infrared VCSELs
Author(s): V. Jayaraman; B. Kolasa; C. Lindblad; A. Cazabat; C. Burgner; S. Segal; K. Lascola; F. Towner; F. Xie
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Paper Abstract

Over the last two years, our group has reported the first room-temperature continuous-wave (RTCW) fixed wavelength VCSELs operating above 3 microns, in both optically pumped and electrically pumped devices. Our optically pumped 3.3um devices employ one or two wafer-bonded GaAs/AlGaAs mirrors, in conjunction with a type I InGaAsSb/AlInGaAsSb quantum well active region. Our electrically pumped 3.3um devices employ a bottom waferbonded GaAs/AlGaAs mirror, top deposited ZnSe/ThF4 mirror, and type II interband cascade (ICL) active region. These fixed wavelength devices lay a foundation for tunable devices in the spectrally rich 3-5um region. Narrowly tunable devices can use thermal tuning, by variation of pump power (optically pumped devices), bias current (electrically pumped devices), or device temperature (both electrically and optically pumped devices). In this paper, we describe tunable CW optically pumped devices with >4nm of tuning near 3.3um using variation of pump power. CW electrically pumped devices show ~2nm tuning near 3.3um using variation of bias current. These results are a critical first step towards an inexpensive and high-speed methane sensing source. A first generation of MEMS-tunable optically pumped devices has achieved 70nm tuning range near 3.34um.

Paper Details

Date Published: 24 February 2020
PDF: 9 pages
Proc. SPIE 11300, Vertical-Cavity Surface-Emitting Lasers XXIV, 113000M (24 February 2020); doi: 10.1117/12.2541514
Show Author Affiliations
V. Jayaraman, Praevium Research, Inc. (United States)
B. Kolasa, Praevium Research, Inc. (United States)
C. Lindblad, Praevium Research, Inc. (United States)
A. Cazabat, Praevium Research, Inc. (United States)
C. Burgner, Praevium Research, Inc. (United States)
S. Segal, Ball Aerospace (United States)
K. Lascola, Thorlabs Quantum Electronics (United States)
F. Towner, Thorlabs Quantum Electronics (United States)
F. Xie, Thorlabs Quantum Electronics (United States)

Published in SPIE Proceedings Vol. 11300:
Vertical-Cavity Surface-Emitting Lasers XXIV
Luke A. Graham; Chun Lei, Editor(s)

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