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US 12,038,276 B2Granted
Extended reach ring interferometer with multifiber optical cable for event detection, location, and characterization
OwnerZbigniew Sobolewskiinventor
Life of this patent
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Abstract
An optical fiber ring interferometer is provided, which is based on a common light path for two or more light beam pairs preferably originated from two or more light sources of a substantially different spectrum or from a single light source split spectrum and whereas each light beam of a specific pair is propagating in relative opposite directions, wherein at least one pair of light beams is utilized to detect acousto-mechanical events and to provide information regarding location and other characteristics of detected environmental disturbance.
Claims6
A fiberoptic ring interferometer system comprising:
- a light source;
- a plurality of light detectors;
- a plurality of light beam splitters;
- a plurality of reference coils;
- a plurality of light depolarizers;
- and
- at least two fiberoptic sensing extensions contained in a single multi-fiber optical cable;
- the system being configured such that a light beam from the light source is configured to travel through the plurality of light beam splitters to be split into a plurality of split portions, such that each split portion of the light beam from the light source can travel through a corresponding reference coil of the plurality of the reference coils, a corresponding fiberoptic sensing extension of the at least two fiberoptic sensing extensions, a corresponding light depolarizer of the plurality of light depolarizers, and to a corresponding light detector of the plurality of light detectors, wherein each split portion of the light beam configured to travel through each fiber optic sensing extension has the same wavelength.
5 more elements
Dependencies are inferred from the claim text.