Title:
波長分割多重伝送システム
Document Type and Number:
Japanese Patent JP4020809
Kind Code:
B2
Abstract:
The present invention provides a WDM transmission system that can multiplex/demultiplex and transmit wavelength division multiplexing signals, where signal lights have a different signal bandwidth, in a status without much deterioration of transmission quality. For the WDM signals P0, 10 Gbit/s signals with a 25 GHz bandwidth are arrayed in odd channels on a grid with a 50 GHz interval, and 40 Gbit/s signals with a 75 GHz bandwidth are arrayed in even channels. The WDM signals P0 are demultiplexed by the interleaver 1, then are demultiplexed by the interleavers 2 and 3. The central frequency of the transmission bands of the ports A1 and B1 are shifted from the central frequency of the 10 Gbit/s signals so that the overlapping portion of the transmission band of the ports A1 and B1 substantially match the signal band of the channel ch [4i - 2] (i is an integer of 1 or higher). By this, only 40 Gbit/s signals in the channel ch [4i - 2] are output from the port B1. The overlapping portion of the transmission band of the other port is also set so as to match with the signal band of the signal to be output in the same way.
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Inventors:
Kentaro Nakamura
Takafumi Terahara
Takafumi Terahara
Application Number:
JP2003083984A
Publication Date:
December 12, 2007
Filing Date:
March 26, 2003
Export Citation:
Assignee:
富士通株式会社
International Classes:
H04B10/2507; H04J14/00; H04J14/02
Domestic Patent References:
| JP2001285255A | ||||
| JP2001333015A | ||||
| JP2003032196A | ||||
| JP2003526258A | ||||
| JP2002209236A | ||||
| JP2001333016A | ||||
| JP2002112294A |
Attorney, Agent or Firm:
Hayashi Tsunetoku
Kenji Doi
Kenji Doi