| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical switch capable of high-speed switching and having extremely low power consumption including a driver circuit.SOLUTION: An optical switch having one optical input port and N (N is an integer of two or more) optical output ports comprises: a branching element branching into N pieces an optical waveguide for guiding signal light inputted into the optical input port; a light absorption gate Dprovided in each of the N optical output ports and causing the signal light to transmit therethrough or blocking it; and N driver circuits including an inverter circuit 72 using a transistor T, and normally-off operating the absorption gates D, respectively. The branching element, the absorption gate Dand the driver circuit are integrated on the same semiconductor substrate and a control signal from an LVDS termination circuit 71 on a distribution constant line turns on or off the gate of the transistor Tof the driver circuit.SELECTED DRAWING: Figure 7 |
