Broadening of the Measured Frequency Spectrum in a Differential Laser Anemometer due to Interference Plane Gradients

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    Abstract

    It is shown how an inaccurate alignment of a differential laser anemometer may cause a significant broadening of the Doppler spectrum. The reason is the appearance of gradients in the interference pattern in the measuring volume. The phenomenon was investigated theoretically, and a method to measure these gradients is presented.
    Original languageEnglish
    JournalJournal of Physics D: Applied Physics
    Volume6
    Issue number2
    Pages (from-to)164-171
    ISSN0022-3727
    DOIs
    Publication statusPublished - 1973

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