发明名称 |
Wavelength division multiplexing optical transmission system and transmission method |
摘要 |
There is provided a WDM optical transmission system and transmission method that have excellent spectral efficiency. The WDM optical transmission system is provided with: an optical transmitting section having an optical transmitter that generates N wave (wherein N is an integer of 2 or greater) optical signals with an optical frequency spacing DELTAf [Hz] and modulated by a modulation bit rate B [bit/s] (wherein B/DELTAf<=1 [bit/s/Hz]) using a modulation device, and having a coupler that couples the optical signals; an optical receiving section provided with an optical DFT circuit of a sampling frequency DELTAf [Hz] that is equal to the optical frequency spacing; and a bit phase adjustor that makes bit phases of respective wavelength division multiplexed signals synchronous at an input of the optical DFT circuit.
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申请公布号 |
US2003030865(A1) |
申请公布日期 |
2003.02.13 |
申请号 |
US20020214487 |
申请日期 |
2002.07.31 |
申请人 |
NIPPON TELEGRAPH AND TELEPHONE CORPORATION |
发明人 |
YAMADA EIICHI;YOSHIKUNI YUZO;SANJOH HIROAKI |
分类号 |
H04B10/155;H04J14/02;(IPC1-7):H04J14/02;H04B10/12 |
主分类号 |
H04B10/155 |
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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