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 language | English |
---|---|
Pages (from-to) | 1155-1159 |
Number of pages | 5 |
Journal | Physics Procedia |
Volume | 3 |
Issue number | 2 |
DOIs | |
State | Published - 31 Jan 2010 |
Event | 14th International Conference on Narrow Gap Semiconductors and Systems, NGS2-14 - Senda, Japan Duration: 13 Jul 2009 → 17 Jul 2009 |
Keywords
- GaSb
- Infrared
- TDLAS
- VCSEL