| 摘要 |
PURPOSE:To make a matrix optical switch operatable with a low voltage, by providing a control electrode near each optical directional coupler and applying a prescribed voltage of the control electrode of a prescribed optical directional coupler. CONSTITUTION:Optical waveguides 31 and 32 constituting the first optical waveguide group and optical waveguides 33 and 34 constituting the second optical waveguide group are formed on a dielectric or semiconductor substrate 1. Optical waveguides 31 and 32 constitute an optical directional coupler 41, and optical waveguides 33 and 34 constitute an optical coupler 44, and optical directional couplers 42 and 43 are constituted on both sides of optical directional couplers 41 and 44 by optical waveguides 32 and 33. Control electrodes are provided on respective optical directional couplers. Thus, switching is possible with a voltage value between 0 volt and 1 volt, and a low crosstalk is attained easily, and the optical switch is made operatable with a low voltage. |
