| 摘要 |
PROBLEM TO BE SOLVED: To attain an array waveguide type wavelength multiplexer/ demultiplexer capable of improving wavelength accuracy by suppressing a zigzag form and capable of reducing crosstalk to a low level. SOLUTION: The multiplexer/demultiplexer is constituted of one or plural input waveguides 2, a 1st slab waveguide 3, an array waveguide 4 constituted of plural waveguides having respectively different lengths, a 2nd slab waveguide 5, and plural output waveguides 6 which are formed on a substrate 1 and an waveguide having multi-mode electric field distribution is used for a connection part between both the slave waveguides 3, 5. In this case, mode stabilizing waveguides 8 are inserted between the input waveguide 2 and the 1st slave waveguide 3 and between the output waveguide 6 and the 2nd slab waveguide 5. |
