| 摘要 |
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. |
