Long-wavelength InP-based VCSELs with buried tunnel junction: properties and applications

Robert Shau; Markus Ortsiefer; Juergen Rosskopf; Gerhard Boehm; Christian Lauer; Markus Maute; Markus-Christian Amann

doi:10.1117/12.538668

16 June 2004 Long-wavelength InP-based VCSELs with buried tunnel junction: properties and applications

Robert Shau, Markus Ortsiefer, Juergen Rosskopf, Gerhard Boehm, Christian Lauer, Markus Maute, Markus-Christian Amann

Proceedings Volume 5364, Vertical-Cavity Surface-Emitting Lasers VIII; (2004) https://doi.org/10.1117/12.538668
Event: Integrated Optoelectronic Devices 2004, 2004, San Jose, CA, United States

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.

Citation Download Citation

Robert Shau, Markus Ortsiefer, Juergen Rosskopf, Gerhard Boehm, Christian Lauer, Markus Maute, and Markus-Christian Amann "Long-wavelength InP-based VCSELs with buried tunnel junction: properties and applications", Proc. SPIE 5364, Vertical-Cavity Surface-Emitting Lasers VIII, (16 June 2004); https://doi.org/10.1117/12.538668

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