Fibre optic sensor package
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United States of America Patent
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Jun 17, 2014
Grant Date -
Apr 2, 2009
app pub date -
Mar 29, 2007
filing date -
Apr 6, 2006
priority date (Note) -
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Abstract
A fiber-optic sensor package (10) comprises a serial array of fiber-optic sensing coils (14, 16, 18, 20, 22) each of which is comprised in a respective fiber-optic sensor. Four (14, 16, 18, 22) of the coils are housed in a protective casing (24). One of the coils (22) is comprised in a fiber-optic electromagnetic field sensor. The other coils are comprised in respective fiber-optic geophones and/or hydrophones. A single package of the invention allows detection of both seismic and electromagnetic signals. An array of packages of the invention provides detection of both seismic and electromagnetic signal at a series of positions over a long distance or wide area, thus avoiding the need for two conventional arrays. A packages of the invention, and an array of such packages, require little or no electrical power input.
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