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Fiber optical gain equalizer

  • US 7,039,259 B2
  • Filed: 01/16/2004
  • Issued: 05/02/2006
  • Est. Priority Date: 07/18/2001
  • Status: Expired due to Term
First Claim
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1. An optical device comprising:

  • an input fiber for inputting an input optical signal;

    an output fiber for outputting an output optical signal;

    an optical path between said input fiber and said output fiber;

    a substrate comprising at least one step with predefined parameters, said at least one step being disposed in part of said optical path and adding a phase shift to light passing therethrough; and

    a variable phase shifting element controlled by an applied signal, disposed serially with said at least one step in said part of said optical path, and pixilated such that it shifts the phase of light passing through at least a portion of said part of said optical path;

    such that the optical interference between light traversing that part of said optical path containing said at least one step and light traversing those parts of said optical path not containing said at least one step results in a wavelength dependent transmission through said device.

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