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Fiber optic instrument shape sensing system and method

  • US 8,864,655 B2
  • Filed: 09/04/2012
  • Issued: 10/21/2014
  • Est. Priority Date: 08/14/2007
  • Status: Expired due to Fees
First Claim
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1. An instrument system, comprising:

  • an elongate body;

    an optical fiber operatively coupled to the elongate body and having a plurality of strain sensors provided on the optical fiber, each of the plurality of strain sensors having a reflectivity, wherein one of the plurality of strain sensors has a different reflectivity than another one of the plurality of strain sensors; and

    a controller operatively coupled to the optical fiber and comprising a first processor and a second processor,wherein the first processor is configured to receive a first signal from the one of the plurality of strain sensors and to determine the position of the elongate body based on the first signal and based on optical frequency division reflectometry, andwherein the second processor is configured to receive a second signal from the another one of the plurality of strain sensors and to determine the position of the elongate body based on the second signal and based on wave division multiplexing.

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