1
Joseph A Bucaro, Edward F Carome, Henry D Dardy: Fiber optic acoustic sensor. The United States of America represented by the Secretary of the Navy, R S Sciascia, Philip Schneider, Melvin L Crane, July 24, 1979: US04162397 (78 worldwide citation)

An optical fiber acoustical sensor for detecting sound waves in a fluid mum. An optical fiber coil through which a light beam is transmitted is placed in a fluid medium. A sound wave propagating through the fluid medium and incident on the optical fiber coil changes the index of refraction of the op ...


2
Lee E Siems, Grevson Knapp, John Maida: Seismic optical acoustic recursive sensor system. Input Output, Madan Mossman & Sriram P C, February 18, 2003: US06522797 (58 worldwide citation)

A marine seismic fiber optic acoustic sensor system having internal mirrors with a low reflectivity written into the fiber to form a series of continuous, linear sensors incorporated in a single fiber, each sensor bounded by a pair of internal mirrors. A pulsed laser provides optical signals to the ...


3
John Luscombe, John L Maida Jr, Malcolm Paul Varnham, Erhard Lothar Edgar Kluth, Sam Bull: Method and structure for incorporating fiber optic acoustic sensors in a seismic array. GeoSensor Corporation, Felsman Bradley Vaden Gunter & Dillon L, April 3, 2001: US06211964 (56 worldwide citation)

A structure for incorporating fiber optic acoustic sensor in a seismic array includes means for supporting the sensor in a spiral around a central strength member in a manner to isolate shear waves from the sensor. In another aspect, an axially oriented sensor in a seismic array comprises a pressure ...


4
Lee E Siems, Han Sun Choi, Greyson Knapp, Reinis Kanders, John L Maida, Tom O&apos Brien: Optical sensing system. Input Output, Madan Mossman & Sriram P C, July 8, 2003: US06591025 (42 worldwide citation)

A fiber optic acoustic sensor system including an optical conductor having low reflectivity mirrors is provided. Optical sensors are provided by sections of the optical conductor bounded by pairs of the low reflectivity mirrors. Pulses of light are injected into the optical conductor and reflected b ...


5
Nicholas Lagakos, W James Trott: Microbending fiber optic acoustic sensor. Robert F Beers, William T Ellis, John L Forrest, July 16, 1985: US04530078 (37 worldwide citation)

A microbending fiber optic acoustic sensor. A point hydrophone according to a first preferred embodiment of the present Invention includes two opposed pistons which are subjected to an acoustic pressure wave. In response to the pressure wave, the opposed pistons push a pair of deformer plates agains ...


6
Joseph A Bucaro, Edward F Carome: Fiber-optic acoustic sensor. The United States of America represented by the Secretary of the Navy, R S Sciascia, Philip Schneider, Melvin L Crane, December 9, 1980: US04238856 (31 worldwide citation)

An optical fiber acoustical sensor for detecting sound waves in a fluid mum. An optical fiber coil through which a light beam is transmitted is placed in a fluid medium. A sound wave propagating through the fluid medium and incident on the optical fiber coil changes the index of refraction and the l ...


7
Benjamin A Vakoc: Folded sagnac sensor array. The Board of Trustees of the Leland Stanford Junior University, Knobbe Martens Olson & Bear, March 4, 2003: US06529444 (21 worldwide citation)

A folded Sagnac fiber optic acoustic sensor array operates in a manner similar to a Sagnac interferometer but uses a common delay path to reduce distributed pickup in downlead fibers. The fiber optic acoustic sensor array is used to detect acoustic waves in water. By basing the folded Sagnac sensor ...


8
Vakoc Benjamin J: Fiber optic sensor array based on sagnac interferometer. Trustees Ofthe Leland Stanford, January 12, 2005: EP1496723-A1 (18 worldwide citation)

A folded Sagnac fiber optic acoustic sensor array operates in a manner similar to a Sagnac interferometer but uses a common delay path to reduce distributed pickup in downlead fibers. The fiber optic acoustic sensor array is used to detect acoustic waves in water. By basing the folded Sagnac sensor ...


9
Benjamin J Vakoc, Michel J F Digonnet, Gordon S Kino, H John Shaw: Fiber optic acoustic sensor array based on Sagnac interferometer. The Board of Trustees of the Leland Stanford Junior University, Knobbe Martens Olson & Bear, August 1, 2000: US06097486 (15 worldwide citation)

A fiber optic acoustic sensor array is based upon a Sagnac interferometer rather than being based upon Mach-Zehnder interferometers as in known acoustic sensor arrays. The fiber optic acoustic sensor array is used to detect acoustic waves in water. By basing the sensor array on the Sagnac interferom ...


10
Eric Lee Goldner, Michael J Tweedy, Samuel N Fersht, David B Hall: Fiber optic acoustic sensor with specifically selected flexural disks. Northrop Grumman Corporation, Lynn & Lynn, December 17, 2002: US06496264 (15 worldwide citation)

A displacement sensor and an acceleration sensor are mounted to a common support member. The displacement sensor comprises a first circular flexural disk having a natural frequency less than the frequency range of the acoustic waves of interest. Spiral-wound optical fiber coils are mounted to opposi ...