GaInAsSb-AlGaAsSb distributed feedback lasers emitting near 2.4 μm

We have investigated fabrication and characteristics of continuous wave (cw) GaInAsSb-AlGaAsSb distributed feedback (DFB) lasers in the 2.4-μm range. Single-mode DFB emission is obtained without overgrowth by first order Cr-Bragg gratings on both sides of a laser ridge. The cw threshold currents for...

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Bibliographic Details
Published inIEEE photonics technology letters Vol. 16; no. 2; pp. 380 - 382
Main Authors Hummer, M., Rossner, K., Benkert, A., Forchel, A.
Format Journal Article
LanguageEnglish
Published IEEE 01.02.2004
Subjects
Continuous wave
Distributed feedback devices
Emission
Epitaxial growth
Etching
Gas lasers
Gratings
Holes
Injection current
Laser feedback
Laser modes
Lasers
Noise levels
Optical device fabrication
Ridges
Semiconductor lasers
Threshold currents
Waveguide lasers
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Summary:We have investigated fabrication and characteristics of continuous wave (cw) GaInAsSb-AlGaAsSb distributed feedback (DFB) lasers in the 2.4-μm range. Single-mode DFB emission is obtained without overgrowth by first order Cr-Bragg gratings on both sides of a laser ridge. The cw threshold currents for a cavity with a length of 800 μm and a width of 4 μm are around 30 mA. At 20/spl deg/C and at an injection current of 190 mA output powers of 8.5 mW were realized. Monomode emission with a side-mode suppression ratio (SMSR) of 33 dB has been obtained.
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ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2003.821239