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Proceedings Paper

Long-wavelength InP-based VCSELs with buried tunnel junction: properties and applications
Author(s): Robert Shau; Markus Ortsiefer; Juergen Rosskopf; Gerhard Boehm; Christian Lauer; Markus Maute; Markus-Christian Amann
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Paper Abstract

InP-based VCSELs (Vertical Cavity Surface Emitting Lasers) are interesting light sources for applications in spectroscopy and fiberoptical communication. Reviewed are devices with a buried tunnel junction (BTJ) and a dielectric backside reflector directly integrated on a electroplated gold-heatsink in the InGaAlAs/InP material system covering the wavelength range from 1.3 to 2.0 μm. The BTJ accomplishes both current confinement to the active region and wave-guiding by the refractive index distribution to achieve low threshold currents. Furthermore it allows for substitution of p-doped device parts by more suitable n-doped material. This approach already proved excellent device performance such as 7 mW output power (multi-mode) and good high temperature characteristics such as 0.5 mW at 80°C for 1.55 μm. Modulation at 10 Gbit/s was also demonstrated. Since the BTJ VCSEL concept covers a wide wavelength range, there is a high-potential field of applications in Tunable Diode Laser Absorption Spectroscopy (TDLAS). Demonstrated are representative measurements of NH3 and HCl. A specialty of TDLAS with VCSELs is the ability for rapid concentration determination with a time resolution up to the megahertz regime. Recent results and further developments of the device structure are also discussed.

Paper Details

Date Published: 16 June 2004
PDF: 15 pages
Proc. SPIE 5364, Vertical-Cavity Surface-Emitting Lasers VIII, (16 June 2004); doi: 10.1117/12.538668
Show Author Affiliations
Robert Shau, Technische Univ. Muenchen (Germany)
Markus Ortsiefer, VERTILAS GmbH (Germany)
Juergen Rosskopf, VERTILAS GmbH (Germany)
Gerhard Boehm, Technische Univ. Muenchen (Germany)
Christian Lauer, Technische Univ. Muenchen (Germany)
Markus Maute, Technische Univ. Muenchen (Germany)
Markus-Christian Amann, Technische Univ. Muenchen (Germany)

Published in SPIE Proceedings Vol. 5364:
Vertical-Cavity Surface-Emitting Lasers VIII
Chun Lei; Kent D. Choquette; Sean P. Kilcoyne, Editor(s)

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