Single-mode 2.65 μm InGaAsSb/AlInGaAsSb laterally coupled distributed-feedback diode lasers for atmospheric gas detection

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DOIResolve DOI: http://doi.org/10.1364/OE.21.001317
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TypeArticle
Journal titleOptics Express
ISSN1094-4087
Volume21
Issue1
Pages13171323; # of pages: 7
SubjectAbsorption lines; Current thresholds; Distributed-feedback; Gas detection; InGaAsSb; Isotopologues; Modal characteristics; Multi-quantum well structures; Output power; Second orders; Single longitudinal mode; Single mode; Single mode emission; Molecular beam epitaxy; Ridge waveguides; Semiconductor lasers; Distributed feedback lasers
AbstractWe demonstrate index-coupled distributed-feedback diode lasers at 2.65 μm that are capable of tuning across strong absorption lines of HDO and other isotopologues of H2O. The lasers employ InGaAsSb/AlInGaAsSb multi-quantum-well structures grown by molecular beam epitaxy on GaSb, and single-mode emission is generated using laterally coupled second-order Bragg gratings etched alongside narrow ridge waveguides. We verify nearcritical coupling of the gratings by analyzing the modal characteristics of lasers of different length. With an emission facet anti-reflection coating, 2-mm-long lasers exhibit a typical current threshold of 150 mA at 20 °C and are capable of emitting more than 25 mW in a single longitudinal mode, which is significantly higher than the output power reported for losscoupled distributed-feedback lasers operating at similar wavelengths. © 2013 Optical Society of America.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Microstructural Sciences (IMS-ISM)
Peer reviewedYes
NPARC number21269831
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Record identifierfeb1eff6-dd15-4a2e-8c33-1ec69e031e94
Record created2013-12-13
Record modified2016-05-09
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