| 摘要 |
PROBLEM TO BE SOLVED: To provide a 2-wavelength optical multiplexer-demultiplexer for adopting an optical waveguide whose constitution material is the inexpensive polymer of excellent productivity. SOLUTION: This 2-wavelength optical multiplexer-demultiplexer for using a dielectric multi-layer film filter 3 and multiplexing/demultiplexing 2-wavelength light is provided with optical fiber fixing grooves 81 and 82 formed on an optical waveguide substrate 1, optical fibers 71 and 72 fitted and fixed to the optical fiber fixing grooves 81 and 82, a dielectric multi-layer film filter insertion groove 2 formed on the optical waveguide substrate 1 and inclined and crossed with the optical fiber fixing grooves 81 and 82 relating to the stretched direction, the dielectric multi-layer film filter 3 inserted to the area crossed with the optical waveguide substrate 1 of the dielectric multi-layer film filter insertion grooves 2 and brought into contact with the end face of the optical fiber and a Y branched optical waveguide 54 formed on the optical waveguide substrate 1 whose end face is arranged near the dielectric multi-layer film filter 3. |
