Grating-based wavelength selective switch

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

2007-01-23

2007-01-23

Pak, Sung (Department: 2874)

Optical waveguides

With optical coupler

Input/output coupler

Reexamination Certificate

active

10923369

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: 7003181 (2006-02-01), Domash et al.
patent: 2004/0146240 (2004-07-01), Zhang et al.
patent: 2004/0228574 (2004-11-01), Chen et al.

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