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OPTICAL TIME DOMAIN REFLECTOMETRY FOR MULTIPLE SPATIAL MODE FIBERS

  • US 20130315532A1
  • Filed: 05/22/2012
  • Published: 11/28/2013
  • Est. Priority Date: 05/22/2012
  • Status: Active Grant
First Claim
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1. An apparatus comprising:

  • an N×

    1 spatial mode multiplexer having N input ports and having an output port end-couplable to a multimode optical fiber, the multiplexer being configured to preferentially couple light between individual ones of the input ports and corresponding spatial optical modes of the multimode optical fiber;

    an optical source connected to a first one of said input ports to launch an optical probe pulse into the fiber; and

    an optical receiver connected to electrically analyze an optical signal backscattered from said multimode optical fiber and output by a second one of the input ports in response to the launch of the optical probe pulse into the fiber.

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