Optical semiconductor device for demultiplexing wavelength multi

Details Optical semiconductor device for demultiplexing wavelength multi Optical semiconductor device for demultiplexing wavelength multi

1988-09-19

1990-08-21

Lee, John D.

Multiplex communications

Wide area network

Packet switching

350 9615, 370 3, H04J 1402

Patent

active

049500449

ABSTRACT:
An optical semiconductor device for demultiplexing wavelength multiplexed lights utilizes a plurality of waveguides including a superlattice structure, a plurality of directional couplers for coupling two neighboring waveguides among the plurality of waveguides, and a plurality of electrodes for applying different voltages to the plurality of waveguides. When the different voltages are applied to the plurality of waveguides, light having a first wavelength is absorbed in a first waveguide among the plurality of waveguides, while the other remaining lights are waveguided through the first waveguide and transferred through a first directional coupler among the plurality of directional couplers to a second waveguide among the plurality of waveguides. In the second waveguide, light having a second wavelength is absorbed and the other remaining lights are waveguided therethrough. Thus, the wavelength multiplexed lights are demultiplexed and detected therein.

REFERENCES:
patent: 4665421 (1987-05-01), Borner et al.
patent: 4799749 (1989-01-01), Borner et al.
patent: 4826295 (1989-05-01), Burt
Larson et al, "High-Speed Dual-Wavelength Demultiplexing . . . Detector Array", Apply. Phys. Lett., 49 (5), Aug. 1986, pp. 233-235.
"Gigahertz-Bandwidth InGaAsP/InP . . . Waveguides", Reprinted from Electronic Letters, 13th Sep., 1984, vol. 20, No. 19, pp. 790-792.

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