Design and Continuous-Wave Room-Temperature Performance of Ga(AlInAs)Sb DFB Lasers at 2.8 [mu] m

We have fabricated continuous-wave GaInAsSb-AlGaAsSb distributed-feedback (DFB) lasers in the 2.8- mum range, using a DFB concept requiring no subsequent overgrowth steps, by defining first-order Cr-Bragg gratings laterally to a ridge waveguide. We have simulated the confinement factor Gamma@@dCr@ o...

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Bibliographic Details
Published inIEEE photonics technology letters Vol. 21; no. 1; pp. 36 - 38
Main Authors Hummer, M, Rosner, K, Lehnhardt, T, Muller, M, chel, A
Format Journal Article
LanguageEnglish
Published 01.01.2009
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Summary:We have fabricated continuous-wave GaInAsSb-AlGaAsSb distributed-feedback (DFB) lasers in the 2.8- mum range, using a DFB concept requiring no subsequent overgrowth steps, by defining first-order Cr-Bragg gratings laterally to a ridge waveguide. We have simulated the confinement factor Gamma@@dCr@ of the optical mode and the Cr-grating for various ridge widths and investigated the effect on laser properties and single- mode yield in order to optimize DFB lasers in this wavelength region. In terms of low threshold current and high output power, we found an optimum ridge width around 7 mum. These lasers show the smallest average threshold current around 33 mA and a high average output power around 7 mW per facet.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:1041-1135
DOI:10.1109/LPT.2008.2005846FirstPublished:2008-10-31