发明名称 |
OPTICAL WAVELENGTH MULTIPLEXER/DEMULTIPLEXER |
摘要 |
Plurality of channel waveguides of an arrayed waveguide diffraction grating are arranged such that all of intervals thereof are not constant between each two adjacent channel waveguides at a first coupling portion for coupling an input slub waveguide and the arrayed waveguide diffraction grating and a second coupling portion for coupling an output slub waveguide and the arrayed waveguide diffraction grating. Further, the plurality of channel waveguides of the arrayed waveguide diffraction grating are arranged such that all of length differences thereof are not constant between each two adjacent channel waveguides. For example, one of the channel waveguides is deleted, so that a length difference of adjacent channel waveguides is determined to be larger than that of the other two adjacent waveguides. According to this structure, it is possible to provide an optical waveguide multiplexer/demultiplexer in which an insertion loss property becomes flat in all wavelength ranges and the insertion loss characteristics are not fluctuated by the fluctuation of the wavelength.
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申请公布号 |
CA2253972(A1) |
申请公布日期 |
1999.11.29 |
申请号 |
CA19982253972 |
申请日期 |
1998.11.12 |
申请人 |
HITACHI CABLE, LTD. |
发明人 |
INABA, KIMIO;MOROSAWA, KENICHI;AKIBA, KENJI |
分类号 |
G02B6/34;(IPC1-7):H04J14/02 |
主分类号 |
G02B6/34 |
代理机构 |
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地址 |
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