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  • 1
    Electronic Resource
    Electronic Resource
    Thermodynamics approach to catastrophic optical mirror damage of AlGaAs single quantum well lasers (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 1152-1154 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The time dependence of catastrophic optical damage (COD) was studied for the cw operation of AlGaAs single quantum well lasers with cleaved mirrors. An empirical rule is proposed, which yields the time for a COD failure in the form of a rate equation, containing a frequency factor and an activation energy. In this way COD is explained as a thermally activated process, depending on the mirror temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101681
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Arrhenius parameters for the rate process leading to catastrophic damage of AlGaAs-GaAs laser facets (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 4848-4853 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The time dependence of catastrophic optical mirror damage (COMD) is investigated for cw operation of AlGaAs-GaAs quantum well lasers. The apparent Arrhenius parameters (i.e., the activation energy and pre-exponential factor) for the rate process leading to COMD are determined. In particular, we compare the rate process for various cleaved facets with and without a subsequent plasma oxidation step. Analysis of the experimental Arrhenius parameters indicates that surface reactions on the corroded facets are responsible for facet degradation accompanied by heating. A tentative model of the facet heating that ultimately leads to COMD is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.350628
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  • 3
    Electronic Resource
    Electronic Resource
    High-power operation of strained InGaAs/AlGaAs single quantum well lasers (1991)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 59 (1991), S. 2642-2644 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The high-power integrity of strained single quantum well InGaAs/AlGaAs lasers grown by molecular beam epitaxy is investigated. In the high-power regime, the lifetime of the Lz=7 nm strained quantum well laser emitting at (approximately-equal-to) 980 nm is found to be limited by the air-cleaved facets. However, a comparison with lattice-matched 7 nm quantum well GaAs/AlGaAs lasers, which otherwise have an almost identical vertical structure shows a substantial lifetime improvement. This indicates that lattice hardening due to the indium in the quantum well is effective in the facet region. The investigations demonstrate the feasibility of 150 mW single mode operation with sufficient lifetime for practical applications in the wavelength range of (approximately-equal-to)1 μm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.105924
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Generation of 41 mW of blue radiation by frequency doubling of a GaAlAs diode laser (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 56 (1990), S. 2291-2292 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A monolithic ring resonator of KNbO3 was used for efficient frequency doubling of a 856 nm GaAlAs diode laser. A special electronic servo technique was devised to lock the diode laser frequency to the KNbO3 cavity so that stable generation of blue output was obtained. With 105 mW of incident near-infrared power, 41 mW of 428 nm radiation were produced. The conversion efficiency from electrical input power into the diode laser to blue output was ∼10%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.102943
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    Paper (German National Licenses)
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