发明名称 |
Optical multiplexer and optical demultiplexer |
摘要 |
The present invention provides an optical demultiplexer and an optical multiplexer the transmission characteristics of which are unlikely to be affected by fabrication errors and which have small group delay dispersion. A cross output port (X-OUT) of a second optical demultiplexer element (DEMUX) is selected, and a through output port (T-OUT) of a third DEMUX is selected. A T-OUT of a first DEMUX has a passband equal to the X-OUT of the second DEMUX, and a X-OUT of the first DEMUX has a passband equal to the T-OUT of the third DEMUX. The T-OUT of the first DEMUX has group delay characteristics opposite to those of the X-OUT of the second DEMUX, and the X-OUT of the first DEMUX has group delay characteristics opposite to those of the T-OUT of the third DEMUX.
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申请公布号 |
US2002106147(A1) |
申请公布日期 |
2002.08.08 |
申请号 |
US20020067065 |
申请日期 |
2002.02.04 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
KITOH TSUTOMU;INOUE YASUYUKI;OGUMA MANABU;HIBINO YOSHINORI;JINGUJI KANAME |
分类号 |
G02B6/12;G02B6/34;H04J14/02;(IPC1-7):G02B6/293;G02B6/26 |
主分类号 |
G02B6/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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