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21 条记录 (耗时 0.031 秒)

    Light source for generating an output signal having spaced apart frequencies
    6.
    发明授权
    Light source for generating an output signal having spaced apart frequencies 有权
    用于产生具有间隔开的频率的输出信号的光源

    公开(公告)号：US07315697B2

    公开(公告)日：2008-01-01

    申请号：US10173579

    申请日：2002-06-18

    申请人： Israel Smilanski ,  Isaac Shpantzer ,  Jacob B. Khurgin ,  Nadejda Reingand ,  Pak Shing Cho ,  Yaakov Achiam

    发明人： Israel Smilanski ,  Isaac Shpantzer ,  Jacob B. Khurgin ,  Nadejda Reingand ,  Pak Shing Cho ,  Yaakov Achiam

    IPC分类号： H04J14/02 ,  H04B10/04

    CPC分类号： H04J14/005 ,  H04B10/2543 ,  H04B10/2563 ,  H04B10/2572 ,  H04B10/505 ,  H04B10/508 ,  H04J14/02

    摘要： A multiple wavelength light source generates an output signal having a comb of accurately spaced apart frequencies with variable free spectral range in the C-band of optical fiber communication. The light source employs an electro-optical modulator (EOM) driven by a signal generator which modulates with EOM with multiple modulation frequencies to widen the output spectrum of signal. The EOM has a crystal provided with a waveguide. The waveguide may be doped with a rare-earth metal to impart gain properties to equalize the intensities of the comb. In one preferred embodiment, Er, Yt or other doping elements provide the gain property to waveguides. The crystal is also provided with periodically poled structure, and this may be engineered so as to form domains of unequal widths to improve the efficiency of modulation. The output signal from the light source may be split and presented to a bank of filters to create a multiple signals, each signal having one of the spaced apart frequencies. The output signals may be used as channels to be modulated by data and then combined in dense wavelength division multiplexing system, or may be used as a soliton source in time-division multiplexed communication systems.

    摘要翻译： 多波长光源在光纤通信的C波段中产生具有可变自由光谱范围的精确间隔开的频率梳的梳状输出信号。 光源采用由信号发生器驱动的电光调制器（EOM），该调制器利用具有多个调制频率的EOM进行调制，以加宽信号的输出频谱。 EOM具有配有波导的晶体。 波导可以掺杂稀土金属以赋予增益特性以均衡梳子的强度。 在一个优选实施例中，Er，Yt或其它掺杂元件为波导提供增益特性。 晶体还具有周期性极化结构，并且这可以被设计成形成不等宽度的域以提高调制效率。 来自光源的输出信号可以被分离并呈现给一组滤波器以产生多个信号，每个信号具有间隔开的频率之一。 输出信号可以用作要由数据调制的信道，然后在密集波分复用系统中组合，或者可以用作时分多路复用通信系统中的孤立源。

    Method and system for acoustically tuning a light source
    7.
    发明授权
    Method and system for acoustically tuning a light source 有权
    声源调谐光源的方法和系统

    公开(公告)号：US06671425B1

    公开(公告)日：2003-12-30

    申请号：US10173581

    申请日：2002-06-18

    申请人： Jacob B. Khurgin ,  Nadejda Reingand ,  Isaac Shpantzer ,  Israel Smilanski ,  Pak Shing Cho

    发明人： Jacob B. Khurgin ,  Nadejda Reingand ,  Isaac Shpantzer ,  Israel Smilanski ,  Pak Shing Cho

    IPC分类号： G02F1335

    CPC分类号： H04J14/005 ,  G02F1/125 ,  G02F1/21 ,  G02F2001/212 ,  H01S3/0635 ,  H01S3/0637 ,  H01S3/1068 ,  H01S3/1608 ,  H01S3/2383

    摘要： The present invention relates to an integrated light source having first and second optical waveguides defining a first optical coupling region for coupling light therebetween. At least one of the optical waveguides includes a gain medium configured to emit light upon irradiation. The light source also includes a first acoustic wave source to subject the first optical coupling region to acoustic waves having a longitudinal frequency &ohgr;AC1, whereby a frequency of light propagating along one of the first and second waveguides differs from a frequency of light propagating along the other waveguide by an amount by an amount &ohgr;AC1.

    摘要翻译： 本发明涉及具有第一和第二光波导的集成光源，其限定用于在其间耦合光的第一光耦合区域。 光波导中的至少一个包括被配置为在照射时发光的增益介质。 光源还包括第一声波源，用于使第一光耦合区域具有纵向频率ωgaAC1的声波，由此沿着第一和第二波导中的一个传播的光的频率不同于沿另一个传播的光的频率 波导量的量为ωgaAC1。

    System and method for high Z material detection
    9.
    发明授权
    System and method for high Z material detection 有权
    高Z材料检测系统及方法

    公开(公告)号：US07897925B2

    公开(公告)日：2011-03-01

    申请号：US12272780

    申请日：2008-11-17

    申请人： Jacques Goldberg ,  Isaac Shpantzer ,  Yaakov Achiam ,  Nadejda Reingand

    发明人： Jacques Goldberg ,  Isaac Shpantzer ,  Yaakov Achiam ,  Nadejda Reingand

    IPC分类号： G01N23/00 ,  G01N23/201

    CPC分类号： G01T1/2935

    摘要： A method and system for high Z material revealing using muon detection technique is presented. The system measures muons' coordinates, velocities, incidence angles and leaving angles. Two series of detectors: one above and one below the interrogated volume are used. A muon trajectory deviation from an expected trajectory is used for the decision making on the presence of high Z material inside the volume. The muon velocity is measured using either a ring Cerenkov counter, a transition radiation detector or/and a threshold Cerenkov counter. The expected trajectory is calculated basing on known particle velocity.

    摘要翻译： 提出了一种使用μon检测技术进行高Z材料显露的方法和系统。 该系统测量μons的坐标，速度，入射角和离开角度。 使用两个系列的探测器：一个高于和低于询问的体积。 与预期轨迹的μ轨迹偏差用于在体积内存在高Z材料的决策上。 使用环Cerenkov计数器，过渡辐射检测器或/和阈值Cerenkov计数器测量μ子速度。 预期的轨迹是基于已知的粒子速度计算的。

    System and method for multi-dimensional encoding
    10.
    发明授权
    System and method for multi-dimensional encoding 有权
    用于多维编码的系统和方法

    公开(公告)号：US07418209B2

    公开(公告)日：2008-08-26

    申请号：US10462834

    申请日：2003-06-17

    申请人： Aviv Salamon ,  Nadejda Reingand ,  Isaac Shpantzer ,  Michael Tseytlin

    发明人： Aviv Salamon ,  Nadejda Reingand ,  Isaac Shpantzer ,  Michael Tseytlin

    IPC分类号： H04B10/04 ,  H04B10/12 ,  H04B10/06 ,  H04K1/00

    CPC分类号： G02F1/125 ,  G02F1/21 ,  G02F2001/212 ,  H01S3/0635 ,  H01S3/0637 ,  H01S3/1068 ,  H01S3/1608 ,  H01S3/2383 ,  H04J14/005

    摘要： The invention provides, according to its various embodiments, a method for secure communication that involves encoding and transmitting an optical communications signal that is encoded based on a multi-dimensional encoding technique. The multi-dimensional encoding technique includes multiple security layers and varies multiple physical characteristics of a communications signal. The multi-dimensional encoding technique may include at least one or more of encoding a phase of an optical communications signal, encoding a polarization of an optical communications signal, and encoding a frequency of an optical communications signal, or any combination thereof. According to embodiments of the invention, the encoding and/or any decoding of the optical communications signal may be carried out using one or more of an optical phase shift coding, a polarization multiplexing, and a multi-wavelength control. Multi-dimensional encoding and decoding keys are provided.

    摘要翻译： 根据其各种实施例，本发明提供一种用于安全通信的方法，其涉及编码和发送基于多维编码技术编码的光通信信号。 多维编码技术包括多个安全层并改变通信信号的多个物理特性。 多维编码技术可以包括编码光通信信号的相位，编码光通信信号的偏振，以及对光通信信号的频率进行编码，或其任何组合中的至少一个或多个。 根据本发明的实施例，光通信信号的编码和/或任何解码可以使用光相移编码，偏振复用和多波长控制中的一个或多个进行。 提供了多维编码和解码密钥。