Wavelength division multiplexing optical transmission system and transmission method
US7113702B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2002 |
| Grant date | Sep 26, 2006 |
| Priority date | — |
| Expiry date | Sep 23, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0305
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
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 Δf [Hz] and modulated by a modulation bit rate B [bit/s] (wherein B/Δf≦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 Δf [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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.