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  • 1
    Electronic Resource
    Electronic Resource
    Theoretical and experimental study of inhomogeneously pumped distributed feedback lasers (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 7138-7144 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have investigated inhomogeneously pumped index-coupled distributed feedback (DFB) laser structures both theoretically and experimentally. Using a transfer matrix method, an optimized device structure was designed which drastically suppresses the longitudinal sidemodes by concentrating the injection current in the region close to the phase-shift position. In this way, a high yield of monomode lasers together with an easy fabrication technique was achieved without the necessity of end facet antireflection coating. Experimental evidence of the improvement of the single-mode stability is given first by three-section DFB lasers operated by two different injection currents. Second, the proposed three-segment laser pumped with a single drive current was implemented simply by splitting up the contact of a mushroom type 2×λ/8 phase-shifted DFB laser. We observed the theoretically predicted enhanced stability of the Bragg mode with a sidemode suppression ratio of 52 dB and a higher yield of monomode lasers compared with uniformly pumped conventional DFB laser devices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352383
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Hydride-VPE growth of InP and SI InP: Fe in H"2/N"2 ambient
    Amsterdam : Elsevier
    Journal of Crystal Growth 128 (1993), S. 516-520 
    Details
    ISSN: 0022-0248
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0022-0248(93)90378-A
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    Paper (German National Licenses)
    Fulltext
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