Summary form only given. We have carried out several experiments on device optimization for high absorption, on heterodyne detection up to 82 GHz, and on various nonlinear effects using GaAs/AlGaAs QWIPs. Near-ideal (/spl sim/100%) absorption quantum efficiency and room-temperature operation have been achieved, with specially designed devices having a large number of quantum wells and high well doping densities. Record-high frequencies up to 82GHz have been reached in heterodyne detection. Nonlinear effects caused by nonuniformity in potential distribution and laser intensity variation have been studied. Auto-correlation using a two-photon process has been demonstrated.


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    Title :

    Heterodyning and nonlinear QWIPs


    Contributors:
    Liu, H.C. (author)


    Publication date :

    2001-01-01


    Size :

    73759 byte





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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