Method and Apparatus for Photobleaching Patterns in Irradiated Optical Waveguides
Patent, Filed 9 Sep 96, patented 13 Jan 98
DEPARTMENT OF THE NAVY WASHINGTON DC
Pagination or Media Count:
A method and apparatus for photobleaching predetermined patterns in an optical wavegulde. The apparatus irradiates the optical waveguide generally held in a fixture. The irradiation includes a selected region or regions of the optical waveguide Or the entire optical waveguide. The radiation interacts with radiation sensitive constituents in the optical waveguide to induce a light transmission loss. After the irradiation is completed. the optical waveguide is allowed to age whereby the light transmission recovers to an equilibrium less value. Light beams photobleach predetermined patterns into the previously irradiated region or regions. The patterns may take the form of Bragg gratings in the waveguide.
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