| 摘要 |
PROBLEM TO BE SOLVED: To provide an array waveguide grating, an array waveguide grating module, an optical communication apparatus and an optical communication system, by which a degree of freedom in optical frequency characteristics can be increased and the transmission light having flat characteristics can be obtained. SOLUTION: First channel waveguides 1021 -1023 of the array waveguide grating are connected with a first fan-shaped slab waveguide 105 through first - third exponential optical waveguides 1111 -1113 . In a second boundary part 109 located symmetrically with a first boundary part 108 through a channel waveguide array 104, second channel waveguides 1031 -1033 are connected through first - third tapered optical waveguides 1121 -1123 to a second fan-shaped slab waveguide 106, for example. By partially adopting the exponential optical waveguides 111 at least, optical frequency characteristics can be improved rather than the shape of a secondary function and the degree of freedom can be improved rather than a rectangular shape. |
