| 摘要 |
PURPOSE:To perform highly efficient photoelectric conversion by radiating the rays of light propagated through an optical wave guide in the direction of a high-refractive index layer mounted on the optical wave guide when the rays of light reach the part of the layer and causing the rays of light to be made incident on a photovoltaic element. CONSTITUTION:An input optical signal Iin is introduced to the 1st optical wave guide 11 and a reference light IinR is always inputted in the 2nd optical wave guide 12. An output optical signal Iout is obtained from the 3rd optical wave guide 13. Since no electromotive force is generated from a photovoltaic element 15 when the input optical signal Iin is '0', no voltage is applied across electrodes 14. Therefore, 100% of the rays of light propagated through the optical wave guide 12 are shifted from a directional coupler to the optical wave guide 13 and the output optical signal Iout becomes '1'. When the input optical signal Iin is '1', a voltage is generated across the photovoltaic element 15 by the rays of light propagated through the optical wave guide 11 and the voltage is applied across the electrodes 14. Therefore, the rays of light propagated through the optical wave guide 12 are not shifted from the directional coupler to the optical wave guide 13, but propagated through the optical wave guide 12. Accordingly, the output optical signal Iout becomes '0'. |
