Long wavelength electrically pumped GaSb-based buried tunnel junction VCSELs

Alexander Bachmann, Shamsul Arafin, Kaveh Kashani-Shirazi, Markus Christian Amann

Research output: Contribution to journalConference articlepeer-review

6 Scopus citations

Abstract

Long wavelength lasers are attractive light sources for free-space communications, military countermeasures, medical applications and trace-gas sensing systems by tunable diode laser absorption spectroscopy (TDLAS). As technically important gases, such as CO, CO2 or CH4, show strong absorption lines in a wavelength range from 2 to 3.5 μm, one is interested in the development of lasers emitting in that region. The (AlGaIn)(AsSb) material-system based on GaSb is the material of choice for devices in the near- to mid-infrared spectral region. In this paper, we present the device structure, design and results of an electrically-pumped GaSb-based VCSEL. The devices consist of an epitaxial GaSb/AlAsSb distributed Bragg reflector (DBR), a GaInAsSb quantum well gain section, a dielectric top DBR and a buried tunnel junction (BTJ) for electrical as well as optical confinement. Continuous-wave (cw) single-mode emission has been achieved up to a record high ambient temperature of 90 {ring operator}C. The wavelength is (electro-) thermally tunable from 2345 nm to 2365 nm. A maximum output power of 800 μW has been measured at 0 {ring operator}C.

Original languageEnglish
Pages (from-to)1155-1159
Number of pages5
JournalPhysics Procedia
Volume3
Issue number2
DOIs
StatePublished - 31 Jan 2010
Event14th International Conference on Narrow Gap Semiconductors and Systems, NGS2-14 - Senda, Japan
Duration: 13 Jul 200917 Jul 2009

Keywords

  • GaSb
  • Infrared
  • TDLAS
  • VCSEL

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