Optical waveguides – With optical coupler – Input/output coupler
Patent
1994-05-06
1995-10-10
Healy, Brian
Optical waveguides
With optical coupler
Input/output coupler
385 14, 385 15, 385 24, 385 45, 359115, 359124, 359127, 359130, G02B 634, G02B 628
Patent
active
054577608
ABSTRACT:
The present invention relates to methods and apparatus for wavelength division multiplexing (WDM) using arrays of optical filtering elements to create a desired wavelength passband in an optical filter. In one aspect of the invention, an optical demultiplexer is formed using an input waveguide, such as a planar waveguide or an optical fiber, coupled to plural output waveguides. Each output waveguide includes a wavelength selective configuration of optical filtering elements formed within a contiguous portion of the waveguide forming an optical channel-selective filter having spectral regions having an optical transmission passband and spectral regions of low transmissivity. Exemplary optical filtering elements are Bragg gratings formed into an optical filter which transmits a characteristic wavelength band.
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AT&T IPM Corp.
Books Glen E.
Burke Margaret A.
Healy Brian
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