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In-line forward/backward fiber-optic signal analyzer

  • US 8,755,649 B2
  • Filed: 08/11/2010
  • Issued: 06/17/2014
  • Est. Priority Date: 10/19/2009
  • Status: Active Grant
First Claim
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1. A method comprising:

  • generating a seed-signal laser beam;

    propagating the seed-signal laser beam in a forward-traveling direction in a core of an input optical fiber;

    splitting the forward-traveling seed-signal laser beam from the core of the input optical fiber into a plurality of portions including a first portion having majority of the forward-traveling seed-signal laser beam and a second portion having a minority of the forward-traveling seed-signal laser beam;

    directing the first portion of the forward-traveling seed-signal laser beam into a core of a first output optical gain fiber and directing the second portion of the forward-traveling seed-signal laser beam into a core of a second output optical fiber;

    amplifying the first portion of the forward-traveling seed-signal laser beam in the first output optical gain fiber;

    directing at least a first portion of a backward-traveling laser beam from the core of the first output optical gain fiber into a third output optical fiber; and

    analyzing the second portion of the forward-traveling seed-signal laser beam and analyzing at least the first portion of the backward-traveling laser beam.

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