公开(公告)号：US6134037A

公开(公告)日：2000-10-17

申请号：US958736

申请日：1997-10-27

Applicant: Mohammed Shabeer ,  Peter Edward Barnsley ,  Moshe Tur ,  Peter Jonathon Legg ,  David Kennedy Hunter

Inventor： Mohammed Shabeer ,  Peter Edward Barnsley ,  Moshe Tur ,  Peter Jonathon Legg ,  David Kennedy Hunter

IPC: H04B10/85 ,  H04B10/04 ,  H04B10/00

CPC classification number: H04B10/85

Abstract: In an optical network through which data is transmitted as a stream of bits during successive bit periods by an optical source with a given optical center frequency, to a receiver for detecting a frequency baseband, interferometric noise power, in particular incoherent beat noise power, is minimized by causing a variation in the center frequency of the source such as to cause a redistribution of the incoherent beat noise power from the baseband to higher frequencies, thereby reducing the noise in the baseband.

Abstract translation: PCT No.PCT / GB94 / 01149 Sec。 371日期1996年1月22日 102（e）日期1996年1月22日PCT 1994年5月27日PCT公布。 出版物WO94 / 28648 日期1994年12月8日在通过具有给定光中心频率的光源在连续位周期期间数据作为比特流传输的光网络中，用于检测频率基带的接收机，干涉噪声功率，特别是不相干 通过引起源的中心频率的变化使得噪声功率被最小化，从而引起从基带到较高频率的非相干节拍噪声功率的再分配，从而降低基带中的噪声。

公开(公告)号：US07809277B1

公开(公告)日：2010-10-05

申请号：US12070288

申请日：2008-02-14

Applicant: Antonio Mecozzi ,  Jonathan A. Nagel ,  Mark Shtaif ,  Moshe Tur

Inventor： Antonio Mecozzi ,  Jonathan A. Nagel ,  Mark Shtaif ,  Moshe Tur

IPC: H04B10/12

CPC classification number: H04B10/2569

Abstract: Methods and systems for higher-order PMD compensation are implemented by developing an effective mathematical model and applying economical design techniques to the model. By assuming a constant precession rate for a narrow band of frequencies in an optical signal, a simplified model of a higher-order PMD compensator can be derived. The model can be used produce an economical compensator by making multiple uses of selected optical components.

Abstract translation: 通过开发有效的数学模型和对模型应用经济设计技术来实现高阶PMD补偿的方法和系统。 通过对光信号中的窄频带假设恒定的进动速率，可以导出更高阶PMD补偿器的简化模型。 该模型可以通过多次使用选定的光学元件来生产经济的补偿器。

公开(公告)号：US07333728B1

公开(公告)日：2008-02-19

申请号：US11701730

申请日：2007-02-02

Applicant: Antonio Mecozzi ,  Jonathan A. Nagel ,  Mark Shtaif ,  Moshe Tur

Inventor： Antonio Mecozzi ,  Jonathan A. Nagel ,  Mark Shtaif ,  Moshe Tur

IPC: H04J14/02 ,  H04B10/12

CPC classification number: H04B10/2569

Abstract: Methods and systems for higher-order PMD compensation are implemented by developing an effective mathematical model and applying economical design techniques to the model. By assuming a constant precession rate for a narrow band of frequencies in an optical signal, a simplified model of a higher-order PMD compensator can be derived. The model can be used produce an economical compensator by making multiple uses of selected optical components.

Abstract translation: 通过开发有效的数学模型和对模型应用经济设计技术来实现高阶PMD补偿的方法和系统。 通过对光信号中的窄频带假设恒定的进动速率，可以导出更高阶PMD补偿器的简化模型。 该模型可以通过多次使用选定的光学元件来生产经济的补偿器。

公开(公告)号：US4699513A

公开(公告)日：1987-10-13

申请号：US738678

申请日：1985-05-28

Applicant: Janet L. Brooks ,  Moshe Tur ,  Robert C. Youngquist ,  Byoung Y. Kim ,  Robert H. Wentworth ,  Herbert J. Shaw ,  Kjell Blotekjaer

Inventor： Janet L. Brooks ,  Moshe Tur ,  Robert C. Youngquist ,  Byoung Y. Kim ,  Robert H. Wentworth ,  Herbert J. Shaw ,  Kjell Blotekjaer

IPC: G01D21/00 ,  G01D5/26 ,  G01D5/353 ,  G01H7/00 ,  G01H9/00 ,  G01K11/00 ,  G01L1/00 ,  G01N21/00 ,  G01N21/17 ,  G02B6/00 ,  G02B6/14 ,  G02B6/28 ,  G08C15/00 ,  H04J14/00 ,  G01B9/02

CPC classification number: G01D5/35383 ,  G02B6/14 ,  G02B6/2821 ,  G02B6/2826 ,  G02B6/283 ,  G02B6/2843 ,  G02B6/2861 ,  H04J14/002

Abstract: A distributed sensor system including an optical source having a short coherence length for optionally continuously monitoring each sensor in the system. In one preferred embodiment, an array of fiber-optic sensors are organized in a ladder configuration, with the sensors positioned in spaced relation and defining the rungs of the ladder. Light transmitted through the sensors is multiplexed onto a return arm of the ladder, with sensor spacing being such that interference between light from different sensors is prevented. The multiplexed signals are received by an optical fiber receiver which couples the multiplexed light with an interfering optical reference signal to produce a phase difference signal representing conditions influencing selected sensors. Embodiments are disclosed for use of either pulsed or continuous wave light sources. In another preferred embodiment, the sensors comprise a plurality of interferometers connected in series configuration by a common optical fiber, which provides multiplexed output signals from the sensors to another plurality of interferometers comprising receivers. Functional equivalents of the series configuration provide sensors and receivers comprising birefringent or two-mode fiber. The optical path length differences between each pair of sensor arms are selected to prevent interference between the multiplexed sensor output signals from the various sensors. The optical path lengths through the sensors and receivers are structured so that each receiver produces a phase difference signal relating to conditions affecting light transmission through a specific sensor. A phase and amplitude modulation technique is disclosed for providing heterodyned output signals from the distributed sensor system.

Abstract translation: 一种分布式传感器系统，包括具有短相干长度的光源，用于可选地连续监测系统中的每个传感器。 在一个优选实施例中，光纤传感器阵列以梯形结构组织，传感器以间隔关系定位并限定梯子的梯级。 通过传感器传输的光被多路复用到梯子的返回臂上，传感器间隔使得防止来自不同传感器的光之间的干扰。 复用的信号由光纤接收器接收，光纤接收器将复用的光与干涉光参考信号耦合，以产生表示影响所选传感器的条件的相位差信号。 公开了使用脉冲或连续波光源的实施例。 在另一个优选实施例中，传感器包括通过公共光纤串联配置的多个干涉仪，其将来自传感器的多路复用输出信号提供给包括接收器的另外多个干涉仪。 串联配置的功能等同物提供包括双折射或双模光纤的传感器和接收器。 选择每对传感器臂之间的光程长度差以防止来自各种传感器的多路传感器输出信号之间的干扰。 通过传感器和接收器的光路长度被构造成使得每个接收器产生与影响通过特定传感器的光透射的条件相关的相位差信号。 公开了一种用于从分布式传感器系统提供外差输出信号的相位和幅度调制技术。

公开(公告)号：US4588255A

公开(公告)日：1986-05-13

申请号：US503871

申请日：1983-06-13

Applicant: Moshe Tur ,  Joseph W. Goodman ,  Herbert J. Shaw ,  Behzad Moslehi ,  John E. Bowers

Inventor： Moshe Tur ,  Joseph W. Goodman ,  Herbert J. Shaw ,  Behzad Moslehi ,  John E. Bowers

IPC: G02B6/28 ,  G06E3/00 ,  G06G7/12

CPC classification number: G02B6/2861 ,  G06E3/001

Abstract: An array (48, 49, 50, 51) of fiber optic couplers coupling an input (45) and an output (46) waveguide. The output waveguide (46) is routed among the couplers of the array such that either backward or forward coupling exists. With backward coupling, energy coupled into the output waveguide (46) in a coupler of the array is guided back to the preceding coupler for coupling back into the input waveguide (45).The backward coupling allows recirculations to occur between couplers to create poles and zeroes in the transfer function of the array which transfer function can be programmed or tailored somewhat to have specific characteristics. Further, the backward coupling allows the array to be used for matrix-vector multiplication.

Abstract translation: 耦合输入（45）和输出（46）波导的光纤耦合器的阵列（48,49,50,51）。 输出波导（46）在阵列的耦合器之间被路由，使得存在向后或向前耦合。 通过反向耦合，耦合到阵列的耦合器中的输出波导（46）的能量被引导回到先前的耦合器以耦合回到输入波导（45）。 反向耦合允许在耦合器之间发生再循环，以在阵列的传递函数中产生极点和零点，该传递函数可以被编程或稍微修改以具有特定的特性。 此外，反向耦合允许阵列用于矩阵矢量乘法。