Optical switch

Details Optical switch Optical switch

1989-10-30

1991-07-23

Lee, John D.

350 9614, G02F 129

Patent

active

050338110

ABSTRACT:
An optical switch includes at least one input optical semi-conductor waveguide. Two output optical semiconductor waveguides are connected at a branch point to the input optical waveguide, and diverge from the branch point with a preset angle .theta. (degree) between them. A refractive index controlling portion is located on at least one of the output optical waveguides and away from the branch point. The refractive index controlling portion effects a light mode cut-off by electromagnetically causing a reduction of the refractive index of the associated output optical waveguide.

REFERENCES:
patent: 4521069 (1985-06-01), Ikeda
patent: 4778235 (1988-10-01), Fujiwara
patent: 4784451 (1988-11-01), Nakamura et al.
patent: 4795225 (1989-01-01), Sakai et al.
patent: 4813757 (1989-03-01), Sakano et al.
patent: 4832430 (1989-05-01), Tada et al.
patent: 4840446 (1989-06-01), Nakamura et al.
IEEE/OSA Journal, Polarization-and Wavelength-Insensitive Guided-Wave Optical Switch with Semiconductor Y Junction, Journal of Lightwave Technology, vol. 8 No. 8, Aug. 1990 Hisaharu Yanagawa, Ken Ueki, and Yoshiyuki Kamata, pp. 1192-1197.

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