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Optical autodyne detection: theory and experiment.

D U Fluckiger, R J Keyes, J H Shapiro

    Applied Optics
    |May 11, 2010
    PubMed
    Summary
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    Optical autodyne detection measures Doppler shifts using a laser transceiver. This study analyzes its signal-to-noise ratio and compares it with optical heterodyne detection.

    Area of Science:

    • Optics and Photonics
    • Laser Technology
    • Signal Processing

    Background:

    • Optical autodyne detection is a direct method for measuring relative Doppler frequency shifts.
    • Laser transceivers are key components in optical detection systems.
    • Understanding signal and noise characteristics is crucial for performance evaluation.

    Purpose of the Study:

    • To theoretically investigate the carrier-to-noise ratio (CNR) and signal-to-noise ratio (SNR) of an optical autodyne transceiver.
    • To experimentally validate the theoretical findings using a continuous-wave (cw) autodyne transceiver.
    • To compare the performance of optical autodyne detection with optical heterodyne detection.

    Main Methods:

    • Theoretical analysis of CNR and SNR for autodyne detection.

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  • Experimental implementation using a cw laser autodyne transceiver.
  • Comparative analysis of autodyne and heterodyne detection techniques.

    • Main Results:

    • Theoretical framework for autodyne transceiver CNR and SNR established.
    • Experimental data obtained from a cw autodyne transceiver reported.
    • Discussion on the comparative advantages and disadvantages of autodyne versus heterodyne detection.

    Conclusions:

    • The study provides a comprehensive analysis of optical autodyne detection performance.
    • Experimental validation supports the theoretical findings on CNR and SNR.
    • Insights into the relative merits of autodyne detection are offered for practical applications.