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公开(公告)号：DE69826788T2
公开(公告)日：2006-02-09
申请号：DE69826788
申请日：1998-06-25
Applicant: LITTON SYSTEMS INC
Inventor： STEELE JAMES R , CORDOVA AMADO , GOLDNER ERIC LEE
Abstract: A fiber optic rotation sensor system having improved scale factor stability includes an optically pumped gain fiber arranged to provide optical signals to an integrated optics chip connected to a fiber optic sensing coil. An optical coupler receives optical signals from the gain fiber and provides the optical signals to an optical fiber. The optical fiber is arranged to guide optical signals from the optical coupler along an optical path toward the integrated optics chip such that optical signals from the gain fiber are input to the fiber optic sensing coil to form counter-propagating waves therein. The counter-propagating waves traverse the sensing coil and then combine in the integrated optics chip to form a gyro output signal. A depolarizer is placed in the optical path between the first optical coupler and the integrated optics chip to prevent random changes in the state of polarization of optical signals propagating between the gain fiber and the integrated optic chip.
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公开(公告)号：AU765976B2
公开(公告)日：2003-10-09
申请号：AU3871500
申请日：2000-03-08
Applicant: LITTON SYSTEMS INC
Inventor： GOLDNER ERIC LEE , GRIFFIN GARY THOMAS , KAPLAN ROBERT L , BRIGGS WILLIAM DAVID , BEVAN DENNIS PATRICK
Abstract: A sensor array cable and method of construction thereof utilizing a sensor/interlink assembly to facilitate the relatively easy and inexpensive installation of a sensor device in a cable that includes a strength member to provide tensile strength to the cable, optical fibers or wires for carrying electrical or optical energy to and from the sensor device, and a protective outer jacket. A portion of the protective outer jacket is removed allowing access to the inner strength member and optical fibers. A segment of the strength member is removed and an interlink/sensor assembly is installed in its place. The interlink serves to maintain the tensile strength of the cable. Optical fibers and/or electrical wires are connected to the sensor device for operation. The interlink/sensor assembly and associated optical fibers and electrical wires are then enclosed in an overmold which is sealed to the outer protective jacket.
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公开(公告)号：NO20030425L
公开(公告)日：2003-03-03
申请号：NO20030425
申请日：2003-01-27
Applicant: LITTON SYSTEMS INC
Inventor： TWEEDY MICHAEL J , GOLDNER ERIC LEE
IPC: G01H9/00 , G01P15/093 , G01P15/08
Abstract: A fiber optic sensor comprises a flexural disk having a pair of fiber optic coils mounted on opposite sides thereof and connected together to form an interferometer that produces an output signal in response to acceleration of the flexural disk. The flexural disk is mounted in a housing having first and second end plates with a sidewall extending between them. The sidewall is formed to have an inwardly facing groove in which an outer edge portion of the flexural disk is mounted. A support member extends between oppositely facing portions of the first and second end plates and through a central passage in the flexural disk. A damping member is mounted on the central support member and arranged to exert a radial force on an inner edge of the central passage in flexural disk to dampen vibrations of the flexural disk and control the sensor output signal amplitude over a selected frequency band in order to maximize dynamic range.
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公开(公告)号：NO20030425A
公开(公告)日：2003-03-03
申请号：NO20030425
申请日：2003-01-27
Applicant: LITTON SYSTEMS INC
Inventor： TWEEDY MICHAEL J , GOLDNER ERIC LEE
IPC: G01H9/00 , G01P15/093 , G01P15/08
CPC classification number: G01H9/004 , G01P15/093
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公开(公告)号：NO20023512L
公开(公告)日：2002-09-23
申请号：NO20023512
申请日：2002-07-23
Applicant: LITTON SYSTEMS INC
Inventor： GOLDNER ERIC LEE , SALINAS JOSEPH SCOTT
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Patent Agency Ranking26.发明专利
公开(公告)号：CA2240086C
公开(公告)日：2001-09-11
申请号：CA2240086
申请日：1998-06-08
Applicant: LITTON SYSTEMS INC
Inventor： CORDOVA AMADO , STEELE JAMES R , GOLDNER ERIC LEE
IPC: G01C19/72
Abstract: A fiber optic rotation sensor system having improved scale factor stability includes an optically pumped gain fiber arranged to provide optica l signals to an integrated optics chip connected to a fiber optic sensing coil . An optical coupler receives optical signals from the gain fiber and provides th e optical signals to an optical fiber. The optical fiber is arranged to guide optical signals from the optical coupler along an optical path toward the integrated optics chip such that optical signals from the gain fiber are input to the f iber optic sensing coil to form counter-propagating waves therein. The counter-pr opagating waves traverse the sensing coil and then combine in the integrated optics chip to form a gyro output signal. A depolarizer is placed in the optical path between the first optical coupler and the integrated optics chip to prevent random changes in the state of polarization of optical signa ls propagating between the gain fiber and the integrated optic chip.
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公开(公告)号：DE60111137T2
公开(公告)日：2006-05-04
申请号：DE60111137
申请日：2001-07-19
Applicant: LITTON SYSTEMS INC
Inventor： GOLDNER ERIC LEE , TWEEDY MICHAEL J , FERSHT SAMUEL N , HALL DAVID B
IPC: G01H9/00 , A61K31/164 , G01P15/093 , G01V1/18
Abstract: A displacement sensor (21) and an acceleration sensor (23) are mounted to a common support member. The displacement sensor (21) comprises a first circular flexural disk (40) having a natural frequency less than the frequency range of the acoustic waves of interest. Spiral-wound optical fiber coils (53, 55) are mounted to opposite sides of the first flexural disk (40). The acceleration sensor (23) comprises a second flexural disk (68) having a natural frequency greater than the frequency range of the acoustic waves. Spiral-wound optical fiber coils (53, 55) are mounted to opposite sides of the second flexural disk (68). A fiber optic interferometer provides an output signal that is a combination of signals output from the displacement sensor (21) and the acceleration sensor (23). The displacement sensor (21) includes an inertia ring (58) mounted to an edge of the first flexural disk (40) to keep it nearly stationary when an acoustic wave in the selected frequency range is incident upon the housing (22). The flexural disks (40, 68) include upper and lower rings (72, 74) spaced apart from the support post with portions of the disks (40, 68) between the rings (72, 74) and the support post defining hinges (75) at which the flexural disks (40, 68) flex in response to acceleration of the support member along its longitudinal axis. The surfaces of the first and second flexural disks (40, 68) preferably include grooves (84) extending between the upper rings (72) and the outer edges of the flexural disks (268, 274). The grooves (84) are arranged to allow lengths of optical fiber adjacent the rings (72, 74) to pass under the optical fiber coils (77, 79) that are formed on the surfaces of the flexural disks (40, 68).
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公开(公告)号：DE69826788D1
公开(公告)日：2004-11-11
申请号：DE69826788
申请日：1998-06-25
Applicant: LITTON SYSTEMS INC
Inventor： STEELE JAMES R , CORDOVA AMADO , GOLDNER ERIC LEE
Abstract: A fiber optic rotation sensor system having improved scale factor stability includes an optically pumped gain fiber arranged to provide optical signals to an integrated optics chip connected to a fiber optic sensing coil. An optical coupler receives optical signals from the gain fiber and provides the optical signals to an optical fiber. The optical fiber is arranged to guide optical signals from the optical coupler along an optical path toward the integrated optics chip such that optical signals from the gain fiber are input to the fiber optic sensing coil to form counter-propagating waves therein. The counter-propagating waves traverse the sensing coil and then combine in the integrated optics chip to form a gyro output signal. A depolarizer is placed in the optical path between the first optical coupler and the integrated optics chip to prevent random changes in the state of polarization of optical signals propagating between the gain fiber and the integrated optic chip.
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公开(公告)号：CA2353428C
公开(公告)日：2004-10-19
申请号：CA2353428
申请日：2001-07-23
Applicant: LITTON SYSTEMS INC
Inventor： TWEEDY MICHAEL J , FERSHT SAMUEL N , GOLDNER ERIC LEE , HALL DAVID B
IPC: G01H9/00 , G01P15/093 , G01H1/00 , G01J9/02
Abstract: A displacement sensor (21) and an acceleration sensor (23) are mounted to a common support member. The displacement sensor (21) comprises a first circular flexural disk (40) having a natural frequency less than the frequen cy range of the acoustic waves of interest. Spiral-wound optical fiber coils (5 3, 55) are mounted to opposite sides of the first flexural disk (40). The acceleration sensor (23) comprises a second flexural disk (68) having a natural frequency greater than the frequency range of the acoustic waves. Spiral-wound optical fiber coils (53, 55) are mounted to opposite sides of the second flexural di sk (68). A fiber optic interferometer provides an output signal that is a combination of signals output from the displacement sensor (21) and the acceleration sensor (23). The displacement sensor (21) includes an inertia ring (58) mounted to an edge of the first flexural disk (40) to keep it nearly stationary when an acoustic wave in the selected frequency range is incident upon the housing (22). The flexural disks (40, 68) include upper and lower rings (72, 74) spaced apart from the support post with portions of the disks (40, 68) between the rings (72, 74) and the support post defining hinges (75) at which the flexural disks (40, 6 8) flex in response to acceleration of the support member along its longitudina l axis. The surfaces of the first and second flexural disks (40, 68) preferabl y include grooves (84) extending between the upper rings (72) and the outer edges of the flexural disks (268, 274). The grooves (84) are arranged to allow lengths of optical fiber adjacent the rings (72, 74) to pass under the optical fiber coils (77, 79) that are formed on the surfaces of the flexural disks (40, 68).
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公开(公告)号：NO20023512D0
公开(公告)日：2002-07-23
申请号：NO20023512
申请日：2002-07-23
Applicant: LITTON SYSTEMS INC
Inventor： GOLDNER ERIC LEE , SALINAS JOSEPH SCOTT
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