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11. 发明专利

DE69926749T2 未知
公开(公告)号：DE69926749T2
公开(公告)日：2006-06-08
申请号：DE69926749
申请日：1999-03-29
申请人： UNIV LELAND STANFORD JUNIOR
发明人： VAKOC BENJAMIN J
IPC分类号： G01N29/24 , H04R1/44 , G01H9/00 , G01S3/80 , H04R23/00
摘要： 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 array on operating principles similar to the Sagnac interferometer rather than basing the array on a Mach-Zehnder interferometer, the sensor array has a stable bias point, has reduced phase noise, and allows a broadband signal source to be used rather than requiring a more expensive narrowline laser. A large number of acoustic sensors can be multiplexed into the architecture of the folded Sagnac fiber optic acoustic array.

12. 发明专利

CA2457531A1 TWO DELAY COIL SAGNAC-BASED SENSOR ARRAY 未知
公开(公告)号：CA2457531A1
公开(公告)日：2003-02-20
申请号：CA2457531
申请日：2002-08-07
申请人： UNIV LELAND STANFORD JUNIOR
发明人： VAKOC BENJAMIN J
IPC分类号： G01B9/02 , G01B11/00 , G01D5/353 , G01H9/00 , H04R23/00 , H04R1/44 , G02B6/00
摘要： A folded Sagnac fiber optic sensor array uses a common delay path to reduce distributed pickup in downlead fibers. The sensor array is used to detect perturbations (e.g., acoustic waves in water). By basing the folded Sagnac sensor array on operating principles similar to the Sagnac interferometer th e sensor array has a stable bias point, has reduced phase noise, and allows a broadband signal source to be used rather than requiring a more expensive narrowline laser. A large number of sensors can be multiplexed into the architecture of the sensor array. In one particularly preferred embodiment, the sensor array is configured with couplers and amplifiers selected to dire ct substantially equal portions of an input light signal to each sensor in the array. In another particularly preferred embodiment, first and second delay paths (2240 & 2242) are provided for light at first and second wavelengt hs (2210 & 2212) to increase the dynamic range of the sensors.

13. 发明专利

NO20040586L 未知
公开(公告)号：NO20040586L
公开(公告)日：2004-03-31
申请号：NO20040586
申请日：2004-02-09
申请人： UNIV LELAND STANFORD JUNIOR
发明人： VAKOC BENJAMIN J
IPC分类号： G01B9/02 , G01B11/00 , G01D5/353 , G01H9/00 , H04R23/00 , H04R1/44 , G02B6/00
摘要： A folded Sagnac fiber optic sensor array uses a common delay path to reduce distributed pickup in downlead fibers. The sensor array is used to detect perturbations (e.g., acoustic waves in water). By basing the folded Sagnac sensor array on operating principles similar to the Sagnac interferometer the sensor array has a stable bias point, has reduced phase noise, and allows a broadband signal source to be used rather than requiring a more expensive narrowline laser. A large number of sensors can be multiplexed into the architecture of the sensor array. In one particularly preferred embodiment, the sensor array is configured with couplers and amplifiers selected to direct substantially equal portions of an input light signal to each sensor in the array. In another particularly preferred embodiment, first and second delay paths (2240 & 2242) are provided for light at first and second wavelengths (2210 & 2212) to increase the dynamic range of the sensors.

14. 发明专利

CA2457325A1 AMPLIFIED TREE STRUCTURE TECHNOLOGY FOR FIBER OPTIC SENSOR ARRAYS 未知
公开(公告)号：CA2457325A1
公开(公告)日：2003-02-20
申请号：CA2457325
申请日：2002-08-07
申请人： UNIV LELAND STANFORD JUNIOR
发明人： VAKOC BENJAMIN J
IPC分类号： G01B9/02 , G01B11/00 , G01H9/00 , H04R23/00 , H04R1/44 , G02B6/00
摘要： A folded Sagnac fiber optic sensor array uses a common delay path to reduce distributed pickup in downlead fibers. The sensor array is used to detect perturbations (eg., acoustic waves in water). By basing the folded Sagnac sensor array on operating principles similar to the Sagnac interferometer th e sensor array has a stable bias point, has a reduced phase noise, and allows a broadband signal source to be used rather than requiring a more expensive narrowline laser. A large number of sensors can be multiplexed into the architecture of the sensor array. In one particularly preferred embodiment, the sensor array is configured with couplers (2024) and amplifiers (2022) selected to direct substantially equal portions of an input light signal to each sensor array. In another particularly preferred embodiment, first and second delay paths are provided for light at first and second wavelengths (2210 & 2212) to increase the dynamic range of the sensors.

15. 发明专利

NO20004954L 未知
公开(公告)号：NO20004954L
公开(公告)日：2000-11-30
申请号：NO20004954
申请日：2000-10-02
申请人： UNIV LELAND STANFORD JUNIOR
发明人： VAKOC BENJAMIN J , DIGONNET MICHEL J F , KINO GORDON S , SHAW H JOHN
IPC分类号： G01D5/353 , G01H9/00 , G01N29/00 , G01C19/72 , G01C19/64
摘要： 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 interferometer rather than on a Mach-Zehnder interferometer, the sensor array has a stable bias point, has reduced phase noise, has a larger dynamic range, and allows a broadband signal source to be used rather than requiring a more expensive narrowline laser. A large number of acoustic sensors can be multiplexed into the architecture of the Sagnac interferometer.

16. 发明专利

AU3118799A Fiber optic acoustic sensor array based on sagnac interferometer 未知
公开(公告)号：AU3118799A
公开(公告)日：1999-10-25
申请号：AU3118799
申请日：1999-03-29
申请人： UNIV LELAND STANFORD JUNIOR
发明人： VAKOC BENJAMIN J , DIGONNET MICHEL J F , KINO GORDON S , SHAW H JOHN
IPC分类号： G01C19/72 , G01D5/353 , G01H9/00 , G01N29/00
摘要： 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 interferometer rather than on a Mach-Zehnder interferometer, the sensor array has a stable bias point, has reduced phase noise, has a larger dynamic range, and allows a broadband signal source to be used rather than requiring a more expensive narrowline laser. A large number of acoustic sensors can be multiplexed into the architecture of the Sagnac interferometer.

17. 发明专利

NO333376B1 未知
公开(公告)号：NO333376B1
公开(公告)日：2013-05-13
申请号：NO20040585
申请日：2004-02-09
申请人： UNIV LELAND STANFORD JUNIOR
发明人： VAKOC BENJAMIN J
IPC分类号： G01B9/02 , G01H9/00 , G01B11/00 , H04R23/00
摘要： A folded Sagnac fiber optic sensor array uses a common delay path to reduce distributed pickup in downlead fibers. The sensor array is used to detect perturbations (eg., acoustic waves in water). By basing the folded Sagnac sensor array on operating principles similar to the Sagnac interferometer the sensor array has a stable bias point, has a reduced phase noise, and allows a broadband signal source to be used rather than requiring a more expensive narrowline laser. A large number of sensors can be multiplexed into the architecture of the sensor array. In one particularly preferred embodiment, the sensor array is configured with couplers (2024) and amplifiers (2022) selected to direct substantially equal portions of an input light signal to each sensor array. In another particularly preferred embodiment, first and second delay paths are provided for light at first and second wavelengths (2210 & 2212) to increase the dynamic range of the sensors.

18. 发明专利

CA2457325C AMPLIFIED TREE STRUCTURE TECHNOLOGY FOR FIBER OPTIC SENSOR ARRAYS 未知
公开(公告)号：CA2457325C
公开(公告)日：2010-10-26
申请号：CA2457325
申请日：2002-08-07
申请人： UNIV LELAND STANFORD JUNIOR
发明人： VAKOC BENJAMIN J
IPC分类号： G01B9/02 , H04R1/44 , G01B11/00 , G01H9/00 , G02B6/00 , H04R23/00
摘要： A folded Sagnac fiber optic sensor array uses a common delay path to reduce distributed pickup in downlead fibers. The sensor array is used to detect perturbations (eg., acoustic waves in water). By basing the folded Sagnac sensor array on operating principles similar to the Sagnac interferometer the sensor array has a stable bias point, has a reduced phase noise, and allows a broadband signal source to be used rather than requiring a more expensive narrowline laser. A large number of sensors can be multiplexed into the architecture of the sensor array. In one particularly preferred embodiment, the sensor array is configured with couplers (2024) and amplifiers (2022) selected to direct substantially equal portions of an input light signal to each sensor array. In another particularly preferred embodiment, first and second delay paths are provided for light at first and second wavelengths (2210 & 2212) to increase the dynamic range of the sensors.

19. 发明专利

CA2457531C TWO DELAY COIL SAGNAC-BASED SENSOR ARRAY 未知
公开(公告)号：CA2457531C
公开(公告)日：2009-12-08
申请号：CA2457531
申请日：2002-08-07
申请人： UNIV LELAND STANFORD JUNIOR
发明人： VAKOC BENJAMIN J
IPC分类号： G01B9/02 , H04R1/44 , G01B11/00 , G01D5/353 , G01H9/00 , G02B6/00 , H04R23/00
摘要： A folded Sagnac fiber optic sensor array uses a common delay path to reduce distributed pickup in downlead fibers. The sensor array is used to detect perturbations (e.g., acoustic waves in water). By basing the folded Sagnac sensor array on operating principles similar to the Sagnac interferometer th e sensor array has a stable bias point, has reduced phase noise, and allows a broadband signal source to be used rather than requiring a more expensive narrowline laser. A large number of sensors can be multiplexed into the architecture of the sensor array. In one particularly preferred embodiment, the sensor array is configured with couplers and amplifiers selected to dire ct substantially equal portions of an input light signal to each sensor in the array. In another particularly preferred embodiment, first and second delay paths (2240 & 2242) are provided for light at first and second wavelengt hs (2210 & 2212) to increase the dynamic range of the sensors.

20. 发明专利

NO20040586A 未知
公开(公告)号：NO20040586A
公开(公告)日：2004-03-31
申请号：NO20040586
申请日：2004-02-09
申请人： UNIV LELAND STANFORD JUNIOR
发明人： VAKOC BENJAMIN J
IPC分类号： G01B9/02 , G01B11/00 , G01D5/353 , G01H9/00 , H04R23/00 , H04R1/44 , G02B6/00
CPC分类号： G01H9/004 , G01D5/35322
摘要： A folded Sagnac fiber optic sensor array uses a common delay path to reduce distributed pickup in downlead fibers. The sensor array is used to detect perturbations (e.g., acoustic waves in water). By basing the folded Sagnac sensor array on operating principles similar to the Sagnac interferometer the sensor array has a stable bias point, has reduced phase noise, and allows a broadband signal source to be used rather than requiring a more expensive narrowline laser. A large number of sensors can be multiplexed into the architecture of the sensor array. In one particularly preferred embodiment, the sensor array is configured with couplers and amplifiers selected to direct substantially equal portions of an input light signal to each sensor in the array. In another particularly preferred embodiment, first and second delay paths are provided for light at first and second wavelengths to increase the dynamic range of the sensors.

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