Room-temperature operation of 3.26 μm GaSb-based type-I lasers with quinternary AlGaInAsSb barriers

M. Grau, C. Lin, O. Dier, C. Lauer, M. C. Amann

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Abstract

Quinternary AlGaInAsSb is introduced as a new barrier material for GaSb-based type-I laser diodes. For wavelengths beyond 3 μm, this material improves the valence-band offset between GaInAsSb quantum wells and barriers as compared to standard GaInAsSbAlGaAsSb structures. The laser structures, which comprise three compressively strained GaInAsSb quantum wells and AlGaInAsSb barriers and waveguides, show good structural and optical quality. 3.26 μm emission has been achieved with ridge waveguide lasers working in pulsed operation up to 50 °C. With this emission wavelength, a strong absorption line of C H4 is accessible for gas absorption measurements.

Original languageEnglish
Article number241104
Pages (from-to)1-3
Number of pages3
JournalApplied Physics Letters
Volume87
Issue number24
DOIs
StatePublished - 2005

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