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Single-polarization fiber optics magnetic sensor

  • US 4,584,470 A
  • Filed: 12/07/1983
  • Issued: 04/22/1986
  • Est. Priority Date: 12/07/1983
  • Status: Expired due to Term
First Claim
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1. In a single-polarization fiber optics magnetic sensor comprising:

  • a light source;

    a Faraday rotation element;

    a photo-detector; and

    optical waveguide means for optically coupling together said light source, Faraday rotation element and photo-detector;

    the improvement wherein;

    said optical waveguide means comprises polarization-maintaining optical fibers coupled to opposite sides of said Faraday rotation element without a polarizer and without an an analyzer interposed between said Faraday rotation element and said respective polarization-maintaining optical fibers, said optical fibers serving only as an optical waveguide for transmitting optical signals.

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