Optical Fiber Surveillance Topology
First Claim
1. An optical fiber surveillance system, comprising:
- a first optical fiber arranged in a two dimensional topology;
a source of optical energy configured to inject the optical energy into the fiber;
an optical detector configured to detect a return optical signal, the return optical signal associated with an acoustic signal impinging on the fiber; and
an analyzer for determining, based on the characteristics of the return signal, the location along the fiber of the acoustic signal.
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Accused Products
Abstract
In accordance with an aspect of the disclosed technology, a fiber surveillance system includes a single optical fiber, used, for example, in the detection of acoustic signals associated with vibrations or other activity. In one embodiment of the disclosed technology, the fiber is arranged in a two dimensional topology to improve the spatial resolution of the system. With such a topology the spatial monitoring resolution of the surveillance system is significantly improved over systems in which the fiber is deployed in an essentially straight line topology. In a further embodiment of the disclosed technology, two or more such oriented fibers are juxtaposed or overlapped to yield even greater resolution.
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Citations
20 Claims
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1. An optical fiber surveillance system, comprising:
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a first optical fiber arranged in a two dimensional topology; a source of optical energy configured to inject the optical energy into the fiber; an optical detector configured to detect a return optical signal, the return optical signal associated with an acoustic signal impinging on the fiber; and an analyzer for determining, based on the characteristics of the return signal, the location along the fiber of the acoustic signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 16, 20)
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14. A method for determining the location of a source of acoustic energy comprising:
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receiving, from a fiber arranged in a two dimensional topology, an optical signal associated with the acoustic energy; and analyzing the received signal to determine the geographic location of the acoustic signal. - View Dependent Claims (18)
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15. A method for determining the location of a source of acoustic energy comprising:
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receiving, from each of a plurality of fibers arranged in a two dimensional topology, an optical signal associated with the acoustic energy; and analyzing the received signals to determine the geographic location of the acoustic signal. - View Dependent Claims (17, 19)
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Specification