| 摘要 |
PURPOSE:To realize an optical fiber network in simple constitution by using a changeover switch having by-passing function and high switching speed and small in insertion loss. CONSTITUTION:A light transmission path 1 that leads the first input light 11, a light transmission path 2 that leads the second input light 12 which is an output signal of own station and the first electro-optical element 3 in which direction of an optic axis is as shown by the arrow A and to which light 11, 12 that passed the light transmission paths 1, 2 projects are provided in the light changeover switch. Further, the second electro-optical element 4 stuck to the element 3 through a boundary face 5 and opposite in direction of optic axis, electrodes 6, 7 that generates an electric field parallel to the optic axis in the elements 3, 4, a light transmission path 8 having a center axis on the same line with the center line of above-mentioned transmission path 1 and the coincident center axis intersects the boundary face 5 obliquely, and a light transmission path 9 having a center axis deviated to the opposite side of the light transmission path 2 are provided. |
