Optical waveguides – With optical coupler – Switch
Patent
1991-04-17
1992-09-15
Lee, John D.
Optical waveguides
With optical coupler
Switch
385 21, 385 22, 385 40, 385 45, G02B 626
Patent
active
051485052
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.
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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.
Kamata Yoshiyuki
Miyazawa Hidehisa
Ueki Ken
Yanagawa Hisaharu
Lee John D.
The Fukukawa Electric Co., Ltd.
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