A quantum cascade laser operating at 2.5 THz has been investigated with respect to performance parameters which are relevant for a local oscillator in a heterodyne receiver. The beam profile has been measured and transformed in to a close to Gaussian profile resulting in a good matching between the field patterns of the quantum cascade laser and the antenna of a superconducting hot electron bolometric mixer. Noise temperature measurements with the hot electron bolometer and a 2.5 THz quantum cascade laser yielded the same result as with a gas laser as local oscillator.


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    Title :

    Characterization of a quantum cascade laser as local oscillator in a heterodyne receiver at 2.5 THz


    Contributors:
    Hubers, H.W. (author) / Pavlov, S.G. (author) / Semenov, A.D. (author) / Kohler, R. (author) / Mahler, L. (author) / Tredicucci, A. (author) / Beere, H.E. (author) / Ritchie, D.A. (author) / Linfield, E.H. (author)


    Publication date :

    2005-01-01


    Size :

    1768314 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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