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。

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

IPC分类号： G02B6/00 ,  G08B13/18

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。

公开(公告)号：US20070086693A1

公开(公告)日：2007-04-19

申请号：US11461905

申请日：2006-08-02

申请人： Cary Murphy ,  Mark Bridges ,  David Vokey

发明人： Cary Murphy ,  Mark Bridges ,  David Vokey

IPC分类号： G02B6/00

CPC分类号： G02B6/421 ,  G02B6/2852 ,  G02B6/29385 ,  H04B10/2581 ,  H04B10/85

摘要： Intrusion detection of one section only of a multimode fiber uses a light signal launched into the fiber at a location spaced from the source through a single mode fiber to establish a narrow spectral width, under-filled non-uniform mode field power distribution in the fiber. A small portion of the higher order signal modes at the a second location also spaced from the destination is sampled by a tap coupler and monitored for transient changes in the mode field power distribution which are characteristic of intrusion to activate an alarm. A fiber being used for data transmission can be monitored for intrusion by introducing a monitor wavelength different form that of the data signal. Central to this invention is the use of a bulk optic (commonly referred to as a pass/reflect) wavelength division multiplexer, one which maintains the modal distribution within the fiber.

摘要翻译： 仅在多模光纤中的一部分的入侵检测使用通过单模光纤与光源隔开的位置发射到光纤中的光信号，以建立窄光谱宽度，光纤中未充分的非均匀模场分布 。 在距离目的地间隔的第二位置的较高阶信号模式的一小部分由抽头耦合器采样，并监视模式场功率分布中的瞬态变化，这是入侵特性以激活报警。 用于数据传输的光纤可以通过引入与数据信号不同的监视波长来监视入侵。 本发明的核心是使用在光纤内保持模态分布的体光学（通常称为通过/反射）波分复用器。

公开(公告)号：US20060291795A1

公开(公告)日：2006-12-28

申请号：US11152772

申请日：2005-06-15

申请人： Cary Murphy ,  David Vokey ,  Mark Bridges

发明人： Cary Murphy ,  David Vokey ,  Mark Bridges

IPC分类号： G02B6/00

CPC分类号： G08B13/124 ,  G01M11/3181 ,  G01M11/39 ,  G02B6/2766 ,  G08B13/186

摘要： A telecommunications optical fiber is secured against intrusion by detecting manipulation of the optical fiber prior to an intrusion event. This can be used in a non-locating system where the detection end is opposite the transmit end or in a locating system which uses Fresnel reflections and Rayleigh backscattering to the transmit end to detect and then locate the motion. The Rayleigh backscattering time sliced data can be stored in a register until an intrusion event is detected. The detection is carried out by a polarization detection system which includes an optical splitter which is manufactured in simplified form for economic construction. This uses a non-calibrated splitter and less than all four of the Stokes parameters. It can use a polarimeter type function limited to linear and circular polarization or two linear polarizers at 90 degrees.

摘要翻译： 电信光纤通过在入侵事件之前检测光纤的操作来防止入侵。 这可以用在检测端与发射端相对的定位系统中，或者在使用菲涅尔反射和瑞利后向散射到发射端的定位系统中来检测并定位运动。 瑞利后向散射时间分片数据可以存储在寄存器中，直到检测到入侵事件。 该检测是通过偏振检测系统进行的，该偏振检测系统包括以经济构造简化形式制造的分光器。 这使用未校准的分离器和小于所有四个斯托克斯参数。 它可以使用限于线性和圆偏振的偏振计类型功能，或者使用90度的两个线性偏振器。

公开(公告)号：US20070113268A1

公开(公告)日：2007-05-17

申请号：US11461668

申请日：2006-08-01

申请人： Cary Murphy ,  Mark Bridges ,  David Vokey

发明人： Cary Murphy ,  Mark Bridges ,  David Vokey

IPC分类号： H04L9/32

CPC分类号： H04B10/70 ,  H04L9/0858

摘要： In a method for secure transmission of data using a quantum key distribution system where individual photons each having a state of polarization are transmitted from the source to the recipient and where the state of polarization the photons is used to provide the series of bits of the encryption key, manipulation of the optical fiber causing movement of a portion of the fiber indicative of an intrusion event is obtained by analyzing changes in time of the number of dropped bits which is those bits which fail to be accurately detected by the recipient since such changes are indicative of changes in polarization of the photons due to handling of the fiber.

摘要翻译： 在使用量子密钥分发系统进行数据安全传输的方法中，其中各自具有偏振状态的各个光子从源发送到接收者，并且其中偏振状态使用光子来提供加密的一系列位 通过分析作为接收者不能准确检测到的那些位的丢弃位的数量的时间的变化来获得引起光纤的一部分指示入侵事件的光纤的移动的光纤的操作，因为这样的改变是 指示由于处理光纤而导致的光子极化的变化。

公开(公告)号：US20060153491A1

公开(公告)日：2006-07-13

申请号：US11152680

申请日：2005-06-15

申请人： Cary Murphy ,  David Vokey ,  Mark Bridges

发明人： Cary Murphy ,  David Vokey ,  Mark Bridges

IPC分类号： G02B6/00

CPC分类号： H04B10/85 ,  G02B6/276 ,  H04B10/071 ,  H04B10/532 ,  H04L63/1416

摘要： A telecommunications optical fiber is secured against intrusion by detecting manipulation of the optical fiber prior to an intrusion event. This can be used in a non-locating system where the detection end is opposite the transmit end or in a locating system which uses Fresnel reflections and Rayleigh backscattering to the transmit end to detect and then locate the motion. The Rayleigh backscattering time sliced data can be stored in a register until an intrusion event is detected. The detection is carried out by a polarization detection system which includes an optical splitter which is manufactured in simplified form for economic construction. This uses a non-calibrated splitter and less than all four of the Stokes parameters. It can use a polarimeter type function limited to linear and circular polarization or two linear polarizers at 90 degrees.

摘要翻译： 电信光纤通过在入侵事件之前检测光纤的操作来防止入侵。 这可以用在检测端与发射端相对的定位系统中，或者在使用菲涅尔反射和瑞利后向散射到发射端的定位系统中来检测并定位运动。 瑞利后向散射时间分片数据可以存储在寄存器中，直到检测到入侵事件。 该检测是通过偏振检测系统进行的，该偏振检测系统包括以经济构造简化形式制造的分光器。 这使用未校准的分离器和小于所有四个斯托克斯参数。 它可以使用限于线性和圆偏振的偏振计类型功能，或者使用90度的两个线性偏振器。

公开(公告)号：US20070092176A1

公开(公告)日：2007-04-26

申请号：US11461889

申请日：2006-08-02

申请人： Cary Murphy ,  Mark Bridges ,  David Vokey

发明人： Cary Murphy ,  Mark Bridges ,  David Vokey

IPC分类号： G02B6/00

CPC分类号： H04B10/0791 ,  G02B6/14 ,  G02B6/421 ,  H04B10/077 ,  H04B10/07953 ,  H04B10/07955 ,  H04B10/2581 ,  H04B10/85 ,  H04J14/02

摘要： Intrusion detection of one section only of a multimode fiber uses a light signal launched into the fiber at a location spaced from the source through a single mode fiber to establish a narrow spectral width, under-filled non-uniform mode field power distribution in the fiber. A small portion of the higher order signal modes at the a second location also spaced from the destination is sampled by a tap coupler and monitored for transient changes in the mode field power distribution which are characteristic of 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： 仅在多模光纤中的一部分的入侵检测使用通过单模光纤与光源隔开的位置发射到光纤中的光信号，以建立窄光谱宽度，光纤中未充分的非均匀模场分布 。 在距离目的地间隔的第二位置的较高阶信号模式的一小部分由抽头耦合器采样，并监视模式场功率分布中的瞬态变化，这是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。

公开(公告)号：US20070029991A1

公开(公告)日：2007-02-08

申请号：US11461897

申请日：2006-08-02

申请人： Cary Murphy ,  Mark Bridges ,  David Vokey

发明人： Cary Murphy ,  Mark Bridges ,  David Vokey

IPC分类号： G01R31/00

CPC分类号： G01H9/004 ,  H04R3/00

摘要： An acoustic microphone includes a diaphragm attached to one part a detection coil portion of an optical fiber with another part attached to a fixed base member so that vibrations in the diaphragm cause twisting of parts of the fiber on either side of the coil to change polarization of light from a source of polarized light passing through the fiber. These changes are detected in a sensor defined by a polarizer tuned to be orthogonal to the source so that changes increase the intensity of light from a minimum at the tuned condition. An electronic sensor at an end of the fiber downstream of the detection portion is arranged to detect the changes in the light and convert the changes into an output signal representative of the vibrations monitored. The vibrations are detected only by the detection portion by providing a tuneable polarizer at the entrance to the detection coil and by providing a multimode fiber which is not responsive to the vibrations to carry the light to the sensor.

摘要翻译： 声学麦克风包括一个膜片，其一部分附着有光纤的检测线圈部分，另一部分附着到固定基座部件上，使得隔膜中的振动引起线圈两侧的纤维部分的扭转， 来自通过光纤的偏振光源的光。 这些变化在由被调谐为与源正交的偏振器定义的传感器中检测，使得改变在调谐状态下从最小值增加光的强度。 在检测部分下游的纤维的端部处的电子传感器被布置成检测光的变化并将变化转换成表示所监测的振动的输出信号。 通过在检测线圈的入口处提供可调偏振器并且通过提供不响应振动以将光传送到传感器的多模光纤，振动仅由检测部分检测。

公开(公告)号：US20060153520A1

公开(公告)日：2006-07-13

申请号：US11152681

申请日：2005-06-15

申请人： Cary Murphy ,  David Vokey ,  Mark Bridges

发明人： Cary Murphy ,  David Vokey ,  Mark Bridges

IPC分类号： G02B6/00

CPC分类号： H04B10/85 ,  G02B6/276 ,  H04B10/071 ,  H04B10/532 ,  H04L63/1416

摘要： A telecommunications optical fiber is secured against intrusion by detecting manipulation of the optical fiber prior to an intrusion event. This can be used in a non-locating system where the detection end is opposite the transmit end or in a locating system which uses Fresnel reflections and Rayleigh backscattering to the transmit end to detect and then locate the motion. The Rayleigh backscattering time sliced data can be stored in a register until an intrusion event is detected. The detection is carried out by a polarization detection system which includes an optical splitter which is manufactured in simplified form for economic construction. This uses a non-calibrated splitter and less than all four of the Stokes parameters. It can use a polarimeter type function limited to linear and circular polarization or two linear polarizers at 90 degrees.

摘要翻译： 电信光纤通过在入侵事件之前检测光纤的操作来防止入侵。 这可以用在检测端与发射端相对的定位系统中，或者在使用菲涅尔反射和瑞利后向散射到发射端的定位系统中来检测并定位运动。 瑞利后向散射时间分片数据可以存储在寄存器中，直到检测到入侵事件。 该检测是通过偏振检测系统进行的，该偏振检测系统包括以经济构造简化形式制造的分光器。 这使用未校准的分离器和小于所有四个斯托克斯参数。 它可以使用限于线性和圆偏振的偏振计类型功能，或者使用90度的两个线性偏振器。

公开(公告)号：US20060002649A1

公开(公告)日：2006-01-05

申请号：US11137776

申请日：2005-05-26

申请人： Cary Murphy ,  Mark Bridges ,  David Vokey

发明人： Cary Murphy ,  Mark Bridges ,  David Vokey

IPC分类号： G02B6/00

CPC分类号： H04B10/0771 ,  G02B6/262 ,  G02B6/4469

摘要： A method and system of intrusion detection system for a multimode fiber optic cable. A light signal is launched into the cable fiber 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 arriving at the remote end of the cable is sampled and monitored for transient changes in the mode field power distribution. The power distribution changes with physical disturbance of the cable. When those changes are detected as being characteristic of fiber intrusion, the system activates an alarm. This method can sense and alarm any attempt to access the optical fibers in a fiber optic communication cable. In preferred embodiments, 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.