| 摘要 |
PURPOSE:To obtain an optical switch which performs switching operation stably at an extremely high speed by forming a optical waveguide in a specific shape. CONSTITUTION:This optical switch consists of a single-mode optical waveguide 11 for input, single mode optical waveguide 12 for output, two arms 13 and 14 made of single-mode optical waveguide, two optical waveguides 17 and 18 for control, etc. The arms 13 and 14 have the same linear refractive index depending upon light intensity. One-side terminals of both arms 13 and 14 are connected to one terminal of the optical waveguide 11 in common through a Y- shaped branching part 15, and the other-side terminals are connected to one terminal of the optical waveguide 12 through a Y-shaped optical coupling part 16 so that light beams having the same power are incident to the arms 13 and 14. The two optical waveguides 17 and 18 are connected to halfway points of the arms 13 and 14 so that light propagates to the other terminal. An electrode 19 for applying an electric field is provided in the arm 13. |
