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公开(公告)号：US07706641B2
公开(公告)日：2010-04-27
申请号：US11461917
申请日：2006-08-02
IPC分类号： G02B6/00
CPC分类号： H04B10/85
摘要： Some or all of the optical fibers of a single-mode or multi-mode cable are monitored for intrusion by transmitting through the fibers a signal which can be analyzed for changes in its characteristics which are indicative of movement as a prelude to an intrusion event. To avoid independent monitors of all of the fibers, in some cases the same light signal is looped through a plurality of the fibers in series by passive jumpers. Switches can be used to disconnect out those fibers which are compromised. As an alternative a plurality of separate monitoring signals can be provided each associated with its own sensor where unique combinations of the signals are transmitted through separate fibers allowing a higher number of fibers to be monitored than the number of signals.
摘要翻译： 监测单模或多模光缆的部分或全部光纤通过光纤传输一个信号，该信号可以分析其特性的变化，这些变化表示作为入侵事件的前奏的移动。 为了避免所有光纤的独立监视器，在某些情况下，相同的光信号通过被动跳线串联的多根光纤环绕。 开关可用于断开那些被损坏的纤维。 作为替代，可以提供多个单独的监视信号，每个独立的监视信号与其自己的传感器相关联，其中信号的独特组合通过分开的光纤传输，允许监视比信号数量更多的光纤。
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公开(公告)号：US07403675B2
公开(公告)日：2008-07-22
申请号：US11461915
申请日：2006-08-02
CPC分类号： H04B10/2581 , G02B6/255 , G08B13/186 , G08B13/1895 , H04B10/85
摘要： Intrusion detection for a multimode fiber optic cable uses a light signal launched into the fiber through the low ratio leg of a tap coupler to establish a narrow spectral width, under-filled non-uniform mode field power distribution in the cable. A small portion of the higher order signal modes at the remote end is monitored for transient changes in the mode field power distribution which are characteristic of fiber intrusion to activate an alarm. The active signal of a multimode optical fiber is monitored for both signal degradation and transient power disturbance patterns that could indicate fiber damage or physical intrusion. A translator can be provided in an existing optical fiber system in which the data signals are translated in wavelength and/or launch conditions to optimize the monitoring signals in an otherwise non-optimized system.
摘要翻译： 多模光纤电缆的入侵检测使用通过分接耦合器的低比例支路发射到光纤中的光信号，以建立电缆中未充分的非均匀模场分布的窄光谱宽度。 监测远端高阶信号模式的一小部分，以模拟现场功率分配的瞬态变化进行监测，这是光纤入侵的特征，用于激活报警。 监测多模光纤的有源信号，用于信号劣化和瞬态功率干扰模式，可以指示光纤损坏或物理入侵。 可以在现有光纤系统中提供转换器，其中数据信号在波长和/或发射条件下被转换，以在另一非优化系统中优化监视信号。
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公开(公告)号：US20070116400A1
公开(公告)日：2007-05-24
申请号：US11461915
申请日：2006-08-02
申请人： Cary Murphy , Mark Bridges , Joseph Giovanni , David Vokey
发明人： Cary Murphy , Mark Bridges , Joseph Giovanni , David Vokey
CPC分类号： H04B10/2581 , G02B6/255 , G08B13/186 , G08B13/1895 , H04B10/85
摘要： Intrusion detection for a multimode fiber optic cable uses a light signal launched into the fiber through the low ratio leg of a tap coupler to establish a narrow spectral width, under-filled non-uniform mode field power distribution in the cable. A small portion of the higher order signal modes at the remote end is monitored for transient changes in the mode field power distribution which are characteristic of fiber intrusion to activate an alarm. The active signal of a multimode optical fiber is monitored for both signal degradation and transient power disturbance patterns that could indicate fiber damage or physical intrusion. A translator can be provided in an existing optical fiber system in which the data signals are translated in wavelength and/or launch conditions to optimize the monitoring signals in an otherwise non-optimized system.
摘要翻译： 多模光纤电缆的入侵检测使用通过分接耦合器的低比例支路发射到光纤中的光信号，以建立电缆中未充分的非均匀模场分布的窄光谱宽度。 监视远端高阶信号模式的一小部分，以模拟现场功率分配的瞬态变化进行监测，这是光纤入侵特性以激活报警。 监测多模光纤的有源信号，用于信号劣化和瞬态功率干扰模式，可以指示光纤损坏或物理入侵。 可以在现有光纤系统中提供转换器，其中数据信号在波长和/或发射条件下被转换，以在另一非优化系统中优化监视信号。
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公开(公告)号：US20070086694A1
公开(公告)日：2007-04-19
申请号：US11461917
申请日：2006-08-02
申请人： Cary Murphy , Mark Bridges , Joseph Giovanni , David Vokey , Daniel Goertzen
发明人： Cary Murphy , Mark Bridges , Joseph Giovanni , David Vokey , Daniel Goertzen
IPC分类号： G02B6/00
CPC分类号： H04B10/85
摘要： Some or all of the optical fibers of a single-mode or multi-mode cable are monitored for intrusion by transmitting through the fibers a signal which can be analyzed for changes in its characteristics which are indicative of movement as a prelude to an intrusion event. To avoid independent monitors of all of the fibers, in some cases the same light signal is looped through a plurality of the fibers in series by passive jumpers. Switches can be used to disconnect out those fibers which are compromised. As an alternative a plurality of separate monitoring signals can be provided each associated with its own sensor where unique combinations of the signals are transmitted through separate fibers allowing a higher number of fibers to be monitored than the number of signals.
摘要翻译： 监测单模或多模光缆的部分或全部光纤通过光纤传输一个信号，该信号可以分析其特性的变化，这些变化表示作为入侵事件的前奏的移动。 为了避免所有光纤的独立监视器，在某些情况下，相同的光信号通过被动跳线串联的多根光纤环绕。 开关可用于断开那些被损坏的纤维。 作为替代，可以提供多个单独的监视信号，每个独立的监视信号与其自己的传感器相关联，其中信号的独特组合通过分开的光纤传输，允许监视比信号数量更多的光纤。
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