公开(公告)号：US20150349910A1

公开(公告)日：2015-12-03

申请号：US14663392

申请日：2015-03-19

申请人： Hao Huang ,  Yang Yue ,  Nisar Ahmed ,  Moshe J. Willner ,  Yan Yan ,  Yongxiong Ren ,  Moshe Tur ,  Alan E. Willner

发明人： Hao Huang ,  Yang Yue ,  Nisar Ahmed ,  Moshe J. Willner ,  Yan Yan ,  Yongxiong Ren ,  Moshe Tur ,  Alan E. Willner

IPC分类号： H04J14/02 ,  H04B10/516 ,  H04B10/532 ,  H04J14/04

CPC分类号： H04J14/04 ,  H04J14/00

摘要： In at least one aspect, a device for Orbital Angular Momentum (OAM) based optical communication includes a first spatial light modulator configured to down-convert a first plurality of higher-order OAM modes from a communication signal to a second plurality of higher-order OAM modes and a first Gaussian mode, a second spatial light modulator configured to drop the first Gaussian mode and add a second Gaussian mode to the second plurality of higher-order OAM modes, and a third spatial light modulator configured to up-convert the second plurality of higher-order OAM modes and the second Gaussian mode to a third plurality of higher-order OAM modes for further communications.

摘要翻译： 在至少一个方面，一种用于基于轨道角动量（OAM）的光通信的装置包括：第一空间光调制器，被配置为将第一多个高阶OAM模式从通信信号下变频到第二多个高阶 OAM模式和第一高斯模式，第二空间光调制器被配置为降低第一高斯模式并将第二高斯模式添加到第二多个高阶OAM模式，以及第三空间光调制器，被配置为将第二高斯模式 多个高阶OAM模式和第二高斯模式到第三多个高阶OAM模式用于进一步通信。

公开(公告)号：US09768909B2

公开(公告)日：2017-09-19

申请号：US14663392

申请日：2015-03-19

申请人： Hao Huang ,  Yang Yue ,  Nisar Ahmed ,  Moshe J. Willner ,  Yan Yan ,  Yongxiong Ren ,  Moshe Tur ,  Alan E. Willner

发明人： Hao Huang ,  Yang Yue ,  Nisar Ahmed ,  Moshe J. Willner ,  Yan Yan ,  Yongxiong Ren ,  Moshe Tur ,  Alan E. Willner

IPC分类号： H04J14/00 ,  H04J14/04

CPC分类号： H04J14/04 ,  H04J14/00

摘要： In at least one aspect, a device for Orbital Angular Momentum (OAM) based optical communication includes a first spatial light modulator configured to down-convert a first plurality of higher-order OAM modes from a communication signal to a second plurality of higher-order OAM modes and a first Gaussian mode, a second spatial light modulator configured to drop the first Gaussian mode and add a second Gaussian mode to the second plurality of higher-order OAM modes, and a third spatial light modulator configured to up-convert the second plurality of higher-order OAM modes and the second Gaussian mode to a third plurality of higher-order OAM modes for further communications.

公开(公告)号：US20130025374A1

公开(公告)日：2013-01-31

申请号：US13411390

申请日：2012-03-02

申请人： Asher Voskoboinik ,  Alan E. Willner ,  Moshe Tur

发明人： Asher Voskoboinik ,  Alan E. Willner ,  Moshe Tur

IPC分类号： G01D5/32

CPC分类号： G01D5/35364 ,  G01D5/35303 ,  G01D5/35387

摘要： Methods and systems used to perform sweep-free stimulated Brillouin scattering-based fiber optical sensing are described. In one aspect, a method includes interrogating different parts of a Brillouin gain spectrum using multiple optical tones in an optical fiber. The interrogating includes sending at least two pump tones into the optical fiber from one end of the optical fiber, such that a frequency spacing between the pump tones is larger than a width of the Brillouin gain spectrum. The interrogating also includes sending at least two probe tones into the optical fiber from another end of the optical fiber, such that a frequency spacing between the probe tones is different from the frequency spacing between the pump tones. The method further includes generating a sensing output based on the interrogating.

摘要翻译： 描述了用于执行无扫描受激布里渊散射的光纤传感的方法和系统。 在一个方面，一种方法包括使用光纤中的多个光学色调来询问布里渊增益谱的不同部分。 询问包括从光纤的一端发送至少两个泵浦音调到光纤中，使得泵浦频率之间的频率间隔大于布里渊增益频谱的宽度。 询问还包括从光纤的另一端发送至少两个探测音调到光纤中，使得探测音之间的频率间隔与泵音之间的频率间隔不同。 该方法还包括基于询问产生感测输出。

公开(公告)号：US08800375B2

公开(公告)日：2014-08-12

申请号：US13411390

申请日：2012-03-02

申请人： Asher Voskoboinik ,  Alan E. Willner ,  Moshe Tur

发明人： Asher Voskoboinik ,  Alan E. Willner ,  Moshe Tur

IPC分类号： G01D5/32

CPC分类号： G01D5/35364 ,  G01D5/35303 ,  G01D5/35387

摘要： Methods and systems used to perform sweep-free stimulated Brillouin scattering-based fiber optical sensing are described. In one aspect, a method includes interrogating different parts of a Brillouin gain spectrum using multiple optical tones in an optical fiber. The interrogating includes sending at least two pump tones into the optical fiber from one end of the optical fiber, such that a frequency spacing between the pump tones is larger than a width of the Brillouin gain spectrum. The interrogating also includes sending at least two probe tones into the optical fiber from another end of the optical fiber, such that a frequency spacing between the probe tones is different from the frequency spacing between the pump tones. The method further includes generating a sensing output based on the interrogating.

摘要翻译： 描述了用于执行无扫描受激布里渊散射的光纤传感的方法和系统。 在一个方面，一种方法包括使用光纤中的多个光学色调来询问布里渊增益谱的不同部分。 询问包括从光纤的一端发送至少两个泵浦音调到光纤中，使得泵浦频率之间的频率间隔大于布里渊增益频谱的宽度。 询问还包括从光纤的另一端发送至少两个探测音调到光纤中，使得探测音之间的频率间隔与泵音之间的频率间隔不同。 该方法还包括基于询问产生感测输出。

公开(公告)号：US06674972B1

公开(公告)日：2004-01-06

申请号：US09650289

申请日：2000-08-29

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

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

IPC分类号： H04B1012

CPC分类号： H04B10/2569

摘要： 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.

摘要翻译： 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：US20130308682A1

公开(公告)日：2013-11-21

申请号：US13981607

申请日：2012-01-26

申请人： Moshe Tur ,  Yair Peled

发明人： Moshe Tur ,  Yair Peled

IPC分类号： G01K11/32

CPC分类号： G01K11/32 ,  G01D5/35303 ,  G01D5/35364 ,  G01K2011/322 ,  G01L1/242 ,  G01M11/319 ,  G01M11/39

摘要： A method of distributed and dynamical Brillouin sensing in optical fibers is provided herein. The method includes the following stages: deriving average characteristics of an optical fiber along its length; generating a variable frequency probe signal, such that the variable frequency is tailored to match, at specified points along the fiber, the respective average characteristics; injecting the variable frequency probe signal to a first end of the optical fiber and a periodic pulse signal to a second end of the optical fiber, wherein the injecting is synchronized such that a stimulated Brillouin scattering is carried out at each one of the specified points along the optical fiber, such that a frequency difference between the probe signal and the pump signal matches the average characteristics of the fiber; and measuring occurrences of the stimulated Brillouin scattering, to yield data indicative of strain and temperature at all points along the optical fiber.

摘要翻译： 本文提供了光纤中分布式和动态布里渊传感的方法。 该方法包括以下阶段：导出沿其长度的光纤的平均特性; 产生可变频率探测信号，使得可变频率被调整为在沿着光纤的特定点处匹配相应的平均特性; 将所述可变频率探测信号注入所述光纤的第一端，并将周期性脉冲信号注入所述光纤的第二端，其中所述注入被同步，使得在所述特定点中的每一个处执行受激布里渊散射 光纤，使得探测信号和泵浦信号之间的频率差与光纤的平均特性匹配; 并测量受激布里渊散射的发生，以产生指示沿着光纤的所有点处的应变和温度的数据。

公开(公告)号：US6134037A

公开(公告)日：2000-10-17

申请号：US958736

申请日：1997-10-27

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

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

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

CPC分类号： H04B10/85

摘要： 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.

摘要翻译： 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：US07203423B1

公开(公告)日：2007-04-10

申请号：US11240066

申请日：2005-09-30

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

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

IPC分类号： H04J14/02 ,  H04B10/12

CPC分类号： H04B10/2569

摘要： 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.

摘要翻译： 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：US4768880A

公开(公告)日：1988-09-06

申请号：US877321

申请日：1986-06-23

申请人： Moshe Tur ,  Byoung Y. Kim ,  Janet L. Brooks ,  Herbert J. Shaw

发明人： Moshe Tur ,  Byoung Y. Kim ,  Janet L. Brooks ,  Herbert J. Shaw

IPC分类号： G01D5/353 ,  G01B9/02

CPC分类号： G01D5/35303

摘要： A technique and system for accurate determination of differential propagation delays in fiber-optic circuits. The method includes providing a sinusoidally modulated optical signal to each of two waveguides defining optical paths. The optical signals received from the optical paths are combined to form a reference output signal which has a null waveform whenever the propagation delay between the optical signals contains an odd number of half periods of the optical signal waveforms. The difference in the sinusoidal modulation frequency producing a first and second null or constant waveform in the reference signal is determined. This difference value between adjacent frequencies forming the null or constant waveforms comprises the inverse of the difference of signal propagation delay in the two optical paths. Accuracy is improved by measuring the sinusoidal modulation frequencies corresponding to first and second waveforms which are not formed by adjacent frequencies. The difference between those nonadjacent frequencies is divided by the difference in the reference waveform orders of the null reference waveforms to obtain the inverse of the differential propagation delay. Further accuracy is achieved by measuring at least one of the waveform nulls at a high waveform order. Still further accuracy is achieved by monitoring the reference waveforms on a network analyzer and using a frequency synthesizer to more precisely match and identify the modulation frequencies corresponding to the null reference signal waveforms. A system is disclosed for implementing this technique optionally using optical sources having a short coherence length. Mathematical relationships are disclosed for use with measured values in obtaining further improved accuracy.

摘要翻译： 一种用于精确确定光纤电路差分传播延迟的技术和系统。 该方法包括向定义光路的两个波导中的每一个提供正弦调制光信号。 每当光信号中的传播延迟包含光信号波形的奇数个半周期时，从光路接收的光信号被组合以形成具有零波形的参考输出信号。 确定在参考信号中产生第一和第二无效或恒定波形的正弦调制频率的差异。 形成零波形或恒定波形的相邻频率之间的差值包括两个光路中的信号传播延迟差的倒数。 通过测量对应于不由相邻频率形成的第一和第二波形的正弦调制频率来提高精度。 这些不相邻频率之间的差异除以空参考波形的参考波形次数的差异，以获得差分传播延迟的倒数。 通过以高波形顺序测量至少一个波形零点来实现进一步的精度。 通过监视网络分析仪上的参考波形并使用频率合成器更精确地匹配和识别与空参考信号波形相对应的调制频率，可以进一步提高精度。 公开了一种用于实现该技术的系统，其可选地使用具有短相干长度的光源。 公开了与测量值一起使用的数学关系，以获得进一步提高的准确度。

公开(公告)号：US06980744B1

公开(公告)日：2005-12-27

申请号：US10657873

申请日：2003-09-09

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

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

IPC分类号： H04B10/18 ,  H04B10/12

CPC分类号： H04B10/2569

摘要： 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.

摘要翻译： 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。