Optical switching device

Details Optical switching device Optical switching device

1995-03-15

1995-12-19

Boudreau, Leo H.

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359133, 385 14, 385 24, H04J 1402

Patent

active

054773636

ABSTRACT:
An optical switching device includes a transparent optical waveguide, a plurality of light emitting elements provided on the optical waveguide for producing wavelength-multiplex optical signals, a plurality of diffraction gratings provided on the optical waveguide in correspondence to the light emitting elements for causing a diffraction of the wavelength-multiplex optical signals supplied thereto, and a plurality of photodetection elements provided on the optical waveguide in correspondence to the paths of the optical beams diffracted by the diffraction gratings, wherein the pitch of the diffraction gratings is optimized with respect to the position of the photodetection elements such that optical signal components having the same wavelength reach the same photodetection elements from the plurality of diffraction gratings.

REFERENCES:
patent: 4773063 (1988-09-01), Hensperger et al.
patent: 5414548 (1995-05-01), Tachikawa et al.
M. Fallahi et al., 1993 IEEE, "Grating Demultiplexer Integrated with MSM Detector Array in InGaAs/AlGaAs/GaAs for WDM", pp. 794-797.
*Patent Abstract of Japan* vol. 12, No. 217 (E-624) 21 Jun. 1988 & JP-A-63-013 492 (NEC).
*Patent Abstract of Japan* vol. 17, No. 448 (P-1594) 17 Aug. 1993 U JP-A-05 100 255 (NIT).

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