利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

8 条记录 (耗时 0.062 秒)

    Method and system for dispersion maps and enhanced distributed gain effect in long haul telecommunications
    3.
    发明授权
    Method and system for dispersion maps and enhanced distributed gain effect in long haul telecommunications 有权
    长距离通信中色散图的方法和系统以及增强的分布增益效应

    公开(公告)号：US06633712B2

    公开(公告)日：2003-10-14

    申请号：US09809422

    申请日：2001-03-16

    申请人： Michael L. Dennis ,  M. Imran Hayee ,  Cathal Mahon ,  Bo Pedersen ,  Nandakumar Ramanujam ,  William Shieh

    发明人： Michael L. Dennis ,  M. Imran Hayee ,  Cathal Mahon ,  Bo Pedersen ,  Nandakumar Ramanujam ,  William Shieh

    IPC分类号： G02B602

    CPC分类号： H04B10/2916 ,  H04B10/25253 ,  H04B2210/003

    摘要： A system and method of providing a transmission span that compensates for signal attenuation, dispersion, and nonlinearity of an optical signal communicated between two line units of a transmission link includes dividing the transmission span into a plurality of fiber segments and selecting a particular fiber for each of the segments. The fiber selection and arrangement of fibers within the span can be selected in accordance with the nonlinearity, dispersion conditions, and distributed gain conditions of the constituent fibers. In a three segment map, the first segment can provide low non linearity, the third segment can provide distributed gain, and the second segment can compensate for the dispersion of the first and third segments. The span can be used, e.g., for distributed Raman amplification. The span can alternatively include a two segment map, a four segment map, or a map with additional segments.

    摘要翻译： 提供传输跨度的系统和方法，其补偿在传输链路的两个线路单元之间传送的光信号的信号衰减，色散和非线性，包括将传输跨度划分为多个光纤段，并为每个光纤段选择特定光纤 的细分。 可以根据构成纤维的非线性，色散条件和分布增益条件来选择跨度内的纤维的纤维选择和排列。 在三段图中，第一段可以提供低非线性，第三段可以提供分布增益，第二段可以补偿第一和第三段的分散。 该跨度可以用于例如分布式拉曼放大。 该跨度可以替代地包括两个分段地图，四个分段地图或具有附加段的地图。

    System and method for optimized transmission in distributed Raman amplified systems operating in saturation
    6.
    发明申请
    System and method for optimized transmission in distributed Raman amplified systems operating in saturation 审中-公开
    用于饱和度分布式拉曼放大系统优化传输的系统和方法

    公开(公告)号：US20050019039A1

    公开(公告)日：2005-01-27

    申请号：US10866846

    申请日：2004-06-14

    申请人： Nandakumar Ramanujam

    发明人： Nandakumar Ramanujam

    IPC分类号： H04B10/17 ,  H04B10/02

    CPC分类号： H04B10/2916

    摘要： A system and method for controlling the amplification of an optical data signal in an optical communication system having a plurality of optical fiber spans, each optical fiber span providing amplification to the optical data signal includes transmitting the optical data signal into a first optical fiber span at an input power level lower than a nominal power level. More than unity gain is provided to the optical data signal over each of at least a first group of the optical fiber spans such that the power level of the optical data signal after propagating through each of the plurality of optical fiber spans is higher than the nominal power level.

    摘要翻译： 一种用于在具有多个光纤跨度的光通信系统中控制光数据信号的放大的系统和方法，每个提供对光数据信号的放大的光纤跨距包括将光数据信号发送到第一光纤跨度 输入功率电平低于额定功率电平。 在光纤跨度的至少第一组中的每个上提供超过单位增益的光学数据信号，使得在通过多个光纤跨度中的每一个传播之后的光学数据信号的功率电平高于标称值 能量等级。

    Optical signal receiver with dual stage soft detection
    7.
    发明授权
    Optical signal receiver with dual stage soft detection 失效
    具有双级软检测功能的光信号接收机

    公开(公告)号：US07340185B1

    公开(公告)日：2008-03-04

    申请号：US10127741

    申请日：2002-04-22

    申请人： Nandakumar Ramanujam ,  Andrej B. Puc

    发明人： Nandakumar Ramanujam ,  Andrej B. Puc

    IPC分类号： H04B10/06

    CPC分类号： H04B10/695

    摘要： An optical receiver including a plurality of time delay elements and threshold decision elements configured to receive a signal representative of an optical signal. Each of the time delay elements is configured to impart an associated time delay to the signal. Each of the threshold decision elements is configured to compare the signal to a plurality of threshold levels. Each decision element outputs a signal indicative of a probability that a particular pulse of the received signal is a binary one at its associated sampling time. An optical communication system and a method of detecting a received data signal in an optical communication system are also provided.

    摘要翻译： 一种光接收机，包括多个时间延迟元件和被配置为接收表示光信号的信号的阈值判定元件。 每个时间延迟元件被配置为给信号赋予相关的时间延迟。 每个阈值判定元件被配置为将信号与多个阈值电平进行比较。 每个决策单元输出指示接收信号的特定脉冲在其相关采样时间是二进制的信号的信号。 还提供了光通信系统和在光通信系统中检测接收数据信号的方法。