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    • 6. 发明授权
    • Optical pulse generator for distributed temperature sensing operating at a characteristic wavelength in a range between 1050 nm and 1090 nm
    • 用于分布式温度感测的光脉冲发生器在1050nm和1090nm之间的范围内的特征波长下工作
    • US07881566B2
    • 2011-02-01
    • US11817821
    • 2006-01-10
    • Gareth P. LeesArthur H. HartogPeter C. Wait
    • Gareth P. LeesArthur H. HartogPeter C. Wait
    • G02B6/00G01K11/00G01J3/00H01S3/10
    • G01K11/32
    • An improved laser source for use in a distributed temperature sensing (DTS) system (and DTS systems employing the same) includes a laser device and drive circuitry that cooperate to emit an optical pulse train at a characteristic wavelength between 1050 nm and 1090 nm. An optical amplifier, which is operably coupled to the laser device, is adapted to amplify the optical pulse train for output over the optical fiber sensor of the DTS system. In the preferred embodiment, the laser device operates at 1064 nm and outputs the optical pulse train via an optical fiber pigtail that is integral to its housing. The optical power of the optical pulse train generated by the laser source is greater than 100 mW, and preferably greater than 1 W, at a preferred pulse repetition frequency range between 1 and 50 kHz, and at a preferred pulse width range between 2 and 100 ns.
    • 用于分布式温度感测(DTS)系统(以及采用该系统的DTS系统)的改进的激光源包括激光装置和驱动电路,其协作以在1050nm和1090nm之间的特征波长发射光脉冲串。 可操作地耦合到激光装置的光放大器适于放大光脉冲串,以便在DTS系统的光纤传感器上输出。 在优选实施例中,激光器件工作在1064nm,并通过与其外壳成一体的光纤引线输出光脉冲串。 在1至50kHz之间的优选脉冲重复频率范围内,并且在优选的脉冲宽度范围为2至100之间,由激光源产生的光脉冲串的光功率大于100mW,优选大于1W ns。
    • 7. 发明授权
    • Distributed sensing in an optical fiber using brillouin scattering
    • 使用布里渊散射的光纤中的分布式感测
    • US07504618B2
    • 2009-03-17
    • US11772997
    • 2007-07-03
    • Arthur H. HartogGareth P. Lees
    • Arthur H. HartogGareth P. Lees
    • G01J1/42G01N21/00G01B11/16
    • G01J3/4412G01D5/35364G01K11/32
    • To perform distributed sensing with an optical fiber using Brillouin scattering, a light pulse is transmitted into the optical fiber, where the transmitted light pulse has a first frequency. Backscattered light and optical local oscillator light are combined, where the backscattered light is received from the optical fiber in response to the transmitted light pulse, and where the optical local oscillator light has a second frequency. A frequency offset is caused to be present between the first frequency of the transmitted light pulse and the second frequency of the optical local oscillator light, where the frequency offset is at least 1 GHz less than a Brillouin frequency shift of the backscattered light. Spectra representing Stokes and anti-Stokes components of the backscattered light are acquired, where the Stokes and anti-Stokes components are separated by a frequency span that is based on the frequency offset.
    • 为了使用布里渊散射使用光纤执行分布式感测,将光脉冲传输到光纤中,其中透射光脉冲具有第一频率。 组合后向散射光和光学本地振荡器光,其中响应于透射的光脉冲从光纤接收反向散射光,并且其中光学本地振荡器光具有第二频率。 使得频率偏移存在于透射光脉冲的第一频率和光学本地振荡器光的第二频率之间,其中频偏比背散射光的布里渊频移小至少1GHz。 获取表示反向散射光的斯托克斯和反斯托克斯分量的光谱,其中斯托克斯和反斯托克斯分量由基于频率偏移的频率间隔分开。
    • 8. 发明申请
    • DISTRIBUTED SENSING IN AN OPTICAL FIBER USING BRILLOUIN SCATTERING
    • 使用白光散射在光纤中进行分布式感测
    • US20090008536A1
    • 2009-01-08
    • US11772997
    • 2007-07-03
    • Arthur H. HartogGareth P. Lees
    • Arthur H. HartogGareth P. Lees
    • G02B27/42G01J1/04
    • G01J3/4412G01D5/35364G01K11/32
    • To perform distributed sensing with an optical fiber using Brillouin scattering, a light pulse is transmitted into the optical fiber, where the transmitted light pulse has a first frequency. Backscattered light and optical local oscillator light are combined, where the backscattered light is received from the optical fiber in response to the transmitted light pulse, and where the optical local oscillator light has a second frequency. A frequency offset is caused to be present between the first frequency of the transmitted light pulse and the second frequency of the optical local oscillator light, where the frequency offset is at least 1 GHz less than a Brillouin frequency shift of the backscattered light. Spectra representing Stokes and anti-Stokes components of the backscattered light are acquired, where the Stokes and anti-Stokes components are separated by a frequency span that is based on the frequency offset.
    • 为了使用布里渊散射使用光纤执行分布式感测,将光脉冲传输到光纤中,其中透射光脉冲具有第一频率。 组合后向散射光和光学本地振荡器光,其中响应于透射的光脉冲从光纤接收反向散射光,并且其中光学本地振荡器光具有第二频率。 使得频率偏移存在于透射光脉冲的第一频率和光学本地振荡器光的第二频率之间,其中频偏比背散射光的布里渊频移小至少1GHz。 获取表示反向散射光的斯托克斯和反斯托克斯分量的光谱,其中斯托克斯和反斯托克斯分量由基于频率偏移的频率间隔分开。
    • 9. 发明申请
    • Optical Pulse Generator for Distributed Temperature Sensing Operating at a Characteristic Wavelength in a Range Between 1050 Nm and 1090 Nm
    • 用于分布式温度传感的光学脉冲发生器在1050 Nm至1090 Nm之间的范围内的特征波长下工作
    • US20080246947A1
    • 2008-10-09
    • US11817821
    • 2006-01-10
    • Gareth P. LeesArthur H. HartogPeter C. Wait
    • Gareth P. LeesArthur H. HartogPeter C. Wait
    • G01J3/00H01S3/00
    • G01K11/32
    • An improved laser source for use in a distributed temperature sensing (DTS) system (and DTS systems employing the same) includes a laser device and drive circuitry that cooperate to emit an optical pulse train at a characteristic wavelength between 1050 nm and 1090 nm. An optical amplifier, which is operably coupled to the laser device, is adapted to amplify the optical pulse train for output over the optical fiber sensor of the DTS system. In the preferred embodiment, the laser device operates at 1064 nm and outputs the optical pulse train via an optical fiber pigtail that is integral to its housing. The optical power of the optical pulse train generated by the laser source is greater than 100 mW, and preferably greater than 1 W, at a preferred pulse repetition frequency range between 1 and 50 kHz, and at a preferred pulse width range between 2 and 100 ns.
    • 用于分布式温度感测(DTS)系统(以及采用该系统的DTS系统)的改进的激光源包括激光装置和驱动电路,其协作以在1050nm和1090nm之间的特征波长发射光脉冲串。 可操作地耦合到激光装置的光放大器适于放大光脉冲串,以便在DTS系统的光纤传感器上输出。 在优选实施例中,激光器件工作在1064nm,并通过与其外壳成一体的光纤引线输出光脉冲串。 在1至50kHz之间的优选脉冲重复频率范围内,并且在优选的脉冲宽度范围为2至100之间,由激光源产生的光脉冲串的光功率大于100mW,优选大于1W ns。
    • 10. 发明申请
    • FAULT-TOLERANT DISTRIBUTED FIBER OPTIC INTRUSION DETECTION
    • 容错分布式光纤入侵检测
    • US20100117830A1
    • 2010-05-13
    • US12518971
    • 2007-12-06
    • Andrew StrongArthur H. Hartog
    • Andrew StrongArthur H. Hartog
    • G08B13/18
    • G08B13/186G01H9/004
    • An intrusion detection system for monitoring a premises includes at least one optical cable that houses at least one optical fiber and extends about the premises. Optical time domain reflectometry (OTDR) means is operably coupled to opposite first and second ends of the at least one optical fiber. The OTDR means includes first signal processing circuitry that analyzes the backscatter signal received via the first end of the at least one optical fiber in order to detect an intrusion of the premises, and second signal processing circuitry that analyzes the backscatter signal received via the second end of the at least one optical fiber in order to detect an intrusion of the premises. The redundancy of intrusions decisions made by the first and second signal processing circuitry can be verified. The system preferably further includes means for detecting a break in the at least one fiber, for identifying location of the break, for outputting to a user the location of the break, and for raising an alarm indicating the break.
    • 用于监视房屋的入侵检测系统包括至少一个光缆,其容纳至少一个光纤并且在房屋周围延伸。 光时域反射计(OTDR)装置可操作地耦合到至少一根光纤的相对的第一和第二端。 OTDR装置包括第一信号处理电路,其分析经由至少一个光纤的第一端接收的反向散射信号,以便检测房屋的入侵;以及第二信号处理电路,其分析经由第二端接收的反向散射信号 的至少一个光纤以便检测房屋的入侵。 可以验证由第一和第二信号处理电路进行的入侵决定的冗余。 该系统优选地还包括用于检测至少一根光纤中的断裂的装置,用于识别断裂的位置,用于向用户输出断裂的位置,以及用于提高指示断裂的报警。