Interferometric method and apparatus for measuring optical signal quality in optical communications system
US7499173B1 · kind B1 · utility
7Cited by
1References
14Claims
0Family size
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Key dates
| Filing date | Nov 28, 2005 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Apr 10, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/07953
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Differences in the interferometric patterns of modulated telecommunication signals and broadband optical noise sources are identified and are exploited in measuring the optical signal-to-noise measurements in reconfigurable photonic networks. A light output power from said interferometer corresponding to a specified delay setting in the interferometer is measured, and a coherent optical signal is distinguished from the incoherent optical noise based on the light output power measurement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.