Method and apparatus for demodulation of optical differential phase shift keyed signals
US7489874B2 · kind B2 · utility
2Cited by
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Key dates
| Filing date | Feb 28, 2005 |
| Grant date | Feb 10, 2009 |
| Priority date | — |
| Expiry date | Oct 17, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/223
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Method and apparatus for demodulating one or more channels of an optical differential phase shift keyed (DPSK) signal with a symbol rate of SR using an athermal optical delay interferometer with a free spectral range (FSR) of 50 GHz/2N, and (0.8×SR)<FSR<(1.3×SR), where N=0, 1, 2 . . . .
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.