Interferometric method and apparatus for measuring optical signal quality in optical communications system
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United States of America Patent
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Sep 13, 2011
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app pub date -
Jan 20, 2009
filing date -
Nov 28, 2005
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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.
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