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Laser wind velocimeter with multiple radiation sources

  • US 8,508,723 B2
  • Filed: 02/14/2011
  • Issued: 08/13/2013
  • Est. Priority Date: 02/14/2011
  • Status: Active Grant
First Claim
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1. A velocimeter comprising:

  • a radiation source configured to produce a coherent radiation beam;

    a modulating system comprising;

    a plurality of modulators, wherein each of the plurality of modulators is configured to modulate the coherent radiation beam; and

    a plurality of optical isolators, wherein each of the plurality of isolators is configured to provide unidirectional propagation of light in an optical fiber;

    a plurality of transceiver modules comprising a plurality of transceivers, wherein each of the plurality of transceivers is configured to;

    receive the modulated beam from the source;

    transmit the modulated beam to a target region; and

    receive a reflected signal from the target region;

    a plurality of optical mixing systems, wherein each of the plurality of optical mixing systems comprises;

    a plurality of optical mixers coupled to the plurality of transceivers, wherein each of the plurality of optical mixers is configured to;

    receive a reference signal from the source and the reflected signal from the corresponding transceiver; and

    determine a Doppler shift based on the reference signal from the source and the reflected signal from the corresponding transceiver.

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