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Dual wavelength optical time domain reflectometer systems and methods embedded in a WDM system

  • US 10,277,311 B2
  • Filed: 11/17/2017
  • Issued: 04/30/2019
  • Est. Priority Date: 04/08/2016
  • Status: Active Grant
First Claim
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1. A method using a bi-directional Optical Time Domain Reflectometer (OTDR) to monitor a fiber optic communication system comprising a first node and a second node, the method comprising:

  • performing a first OTDR measurement at a first OTDR wavelength at the first node on a first fiber;

    performing a second OTDR measurement at a second OTDR wavelength at the second node on the first fiber;

    performing a third OTDR measurement at a third OTDR wavelength at the first node on a second fiber;

    performing a fourth OTDR measurement at a fourth OTDR wavelength at the second node on the second fiber, wherein the first node and the second node are bi-directionally coupled via the fiber optic communication system over the first fiber and the second fiber; and

    utilizing the first OTDR measurement and the second OTDR measurement for event detection on the first fiber.

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