| 摘要 |
PROBLEM TO BE SOLVED: To realize an optical coupling and branching element whose manufacturing process is simple, which is provided with structure having the optimal waveguide shape and reflecting surface and which is excellent in controllability. SOLUTION: A curved waveguide and a linear waveguide are provided within a planar waveguide, and the curved waveguide is formed into discontinuity by the planar waveguide. Optical signals inputted into the curved waveguide are reflected by the discontinuous surface of the curved waveguide, are branched and condensed in the linear waveguide every wavelength. Also, optical signals of respective wavelengths inputted into the linear waveguide are coupled and condensed by the discontinuous part of the curved waveguide. |
