Optical fibre sensor interrogation system
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United States of America Patent
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Apr 12, 2016
Grant Date -
Jul 31, 2014
app pub date -
Jun 28, 2012
filing date -
Jun 29, 2011
priority date (Note) -
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Abstract
A monitoring system for monitoring a plurality of fiber Bragg gratings in an optical fiber, each fiber Bragg grating being sensitive to a different wavelength of light. The system comprises a broadband source for illuminating the optical fiber; at least one optical interferometer; light feeding means for feeding to an input of the interferometer light reflected from the fiber Bragg gratings, and a processor for processing the output from the interferometer to determine the wavelength of the reflected light. The light feeding means comprise a wavelength division multiplexer operable to separate light received from the optical fiber into a plurality of wavelengths, each associated with one of the fiber Bragg gratings and/or a time division mulitplexer operable to separate light received from the optical fiber into in a time separated series.
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