At present, according to various optical and signal processing methods, there are mainly three detection modes in laser radar system: direct detection, heterodyne detection and homodyne detection. A homodyne laser radar system made up of a narrow line-width laser, an amplitude modulator and balanced detector is introduced here. Both transmitted and local oscillator (LO) signals are amplitude modulated by the same chirp signal, and the de-chirping process is completed in the optical domain. When we do signal processing on range and Doppler frequency, we use chirp-z method besides normal Fourier Transform. In this way, we get the experiment data more accurately. The experiment data indicates that the range and velocity precision reaches cm and mm/s dimension which are basically conforming to the theoretical precision.


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    Titel :

    Research on range-Doppler homodyne detection system


    Beteiligte:
    Yu, Xiao (Autor:in) / Hong, Guang-lie (Autor:in) / Ling, Yuan (Autor:in) / Shu, Rong (Autor:in)

    Kongress:

    International Symposium on Photoelectronic Detection and Imaging 2011: Space Exploration Technologies and Applications ; 2011 ; Beijing,China


    Erschienen in:

    Erscheinungsdatum :

    15.08.2011





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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    HOMODYNE DETECTION LASER-INDUCED THERMAL ACOUSTICS VELOCIMETRY

    Schlamp, S. / Allen-Bradley, E. / AIAA | British Library Conference Proceedings | 2000