Optical add/drop multiplexers

Details Optical add/drop multiplexers Optical add/drop multiplexers

2008-05-13

2008-05-13

Font, Frank G. (Department: 2883)

Optical waveguides

With optical coupler

Input/output coupler

C385S031000, C385S039000, C385S040000, C385S041000, C385S047000

Reexamination Certificate

active

07373046

ABSTRACT:
A spectrally selective optical coupler is disclosed, comprising a first and a second waveguide; an external resonator defined by at least a first and a second mirror; and a respective deflecting portion in each of said waveguides for coupling light between the waveguide and the external resonator. The waveguides are arranged between the mirrors adjacent to each other in a plane that is generally parallel to said mirrors; and the external resonator is designed such that a resonant mode within the external resonator overlaps the deflecting portion in the first and the second waveguide. The inventive coupler solves some limiting geometrical problems encountered in the prior art. A lateral extension of a mode in the external resonator overlapping both waveguides is obtained using a curved resonator mirror or refractive elements or portions within the resonator.

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