Grating-based wavelength selective switch

Details Grating-based wavelength selective switch Grating-based wavelength selective switch

2005-04-05

2005-04-05

Healy, Brian M. (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

C385S042000, C385S031000, C385S024000, C398S082000, C398S084000, C398S087000

Reexamination Certificate

active

06876793

ABSTRACT:
The present invention is a wavelength-selective optical transmission system that includes a first waveguide for transmitting a multiplexed optical signal therethrough. The system further includes a second waveguide coupled to the first waveguide wherein a least one of the first and second waveguides have a set of wavelength-selective Bragg gratings disposed near a coupling section between the first and second waveguides to reflect a reflecting optical signal back to the first waveguide and for transmitting a contra-directional optical signal and a co-directional optical signal having respectively a contra-directional selected wavelength and a co-directional selected wavelength corresponding to the Bragg gratings. One of the contra-directional and co-directional wavelengths is chosen as a designated wavelength, and the reflecting optical signal and one of the contra-directional or co-directional optical signals are outside of a predefined range surrounding the designated wavelength.

REFERENCES:
patent: 5446809 (1995-08-01), Fritz et al.
patent: 5875272 (1999-02-01), Kewitsch et al.
patent: 6067389 (2000-05-01), Fatehi et al.
patent: 6201909 (2001-03-01), Kewitsch et al.
patent: 6374019 (2002-04-01), Gustavsson
patent: 6501872 (2002-12-01), Augustsson

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