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Wavelength selective variable reflector

  • US 6,603,902 B1
  • Filed: 09/20/2000
  • Issued: 08/05/2003
  • Est. Priority Date: 10/26/1999
  • Status: Expired due to Term
First Claim
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1. An arrangement comprising an optical waveguide adapted to receive an optical signal which derives an evanescent field, a grating and an electro-optic material arranged adjacent the grating, the electro-optic material having a refractive index which can be varied by applying an electric field to the material so as to control how the grating interacts with the evanescent field of the optical signal, the grating having a spatial period that increases gradually along a length of the grating;

  • wherein the waveguide is an optical fiber with a portion of cladding removed where the electro-optic material is located.

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