| 摘要 |
PURPOSE: A waveguide type all optical logic device using multi mode interference is provided to reduce light loss and to increase an operation speed and to realize a stable operation. CONSTITUTION: The waveguide type all optical logic device comprises a substrate, and a bottom clad layer formed on the substrate, and a top clad layer formed on an upper part of the bottom clad layer. And an optical waveguide is formed in the top clad layer to be adjacent to the bottom clad layer. The optical waveguide comprises a light isolation multi mode waveguide(121,122) connected to two pairs of single mode input waveguides(111,112,113,114) respectively, and a light coupling multi mode waveguide(141,142) connected to the light isolation waveguide by a single mode waveguide and connected to two pairs of single mode output waveguides(151,152,153,154).
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