| 摘要 |
PROBLEM TO BE SOLVED: To suppress loss and to eliminate the wavelength dependency of an input port. SOLUTION: The shape of an input side 27 and the shape of an output side 28 are asymmetry satisfying at least one of relations (1), (2), (3) and (4). (1): fin>fout, (2):Δxin<Δout, (3): din<dout, (4):Δxin<ΔWout, wherein fin: focal length of an input side slab waveguide, fout: focal length of output side slab waveguide,Δxin: input port distance,Δxout: output port distance, din: distance between array waveguides connected to the input side slab waveguide, dout: distance between array waveguides connected to the output side slab waveguide, andΔWout: core opening width of an output waveguide. COPYRIGHT: (C)2010,JPO&INPIT |
