System and method of optical transmission
US7277647B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2002 |
| Grant date | Oct 2, 2007 |
| Priority date | — |
| Expiry date | Oct 1, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/5563
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Minimum shift keying (MSK) is used as the coding scheme in a high bit rate optical transmission system, and the signal format is either RZ (return-to-zero) or NRZ (non-return-to-zero). The system can combine multiple individual channels with different wavelengths in a WDM or dense wavelength division multiplexed (DWDM) arrangement. Dispersion management can be provided using several techniques, such as quasi-linear transmissions or conventional RZ transmissions. At the transmitter, an optical MSK transmitter is used to modulate the phase of a stream of high bit rate (e.g., 40 Gbit/s) optical signals. Many such data streams can be combined in a wavelength division multiplexer and transmitted to a remote receiver, where the signal is wavelength division demultiplexed. The encoded data in each wavelength channel is then recovered by an MSK receiver, which may consist of a delay demodulator and a balanced detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.