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40 条记录 (耗时 0.02 秒)

    Method and apparatus for optimizing the dispersion and dispersion slope for a dispersion map with slope-compensating optical fibers
    13.
    发明授权
    Method and apparatus for optimizing the dispersion and dispersion slope for a dispersion map with slope-compensating optical fibers 失效
    用于利用斜率补偿光纤优化色散图的色散和色散斜率的方法和装置

    公开(公告)号：US06873798B1

    公开(公告)日：2005-03-29

    申请号：US09706475

    申请日：2000-11-03

    申请人： Alexei Pilipetskii ,  Matthew Ma ,  Morten Nissov

    发明人： Alexei Pilipetskii ,  Matthew Ma ,  Morten Nissov

    IPC分类号： H04B10/02 ,  G02B6/34 ,  H04B10/18 ,  H04J14/02 ,  H04B10/12

    CPC分类号： G02B6/29376 ,  H04B10/25253

    摘要： An apparatus comprises an optical sublink including an operationally coupled optical fiber segments. The optical fiber segments are from a first optical fiber type, a second optical fiber type and a third optical fiber type. The first optical fiber type has a positive dispersion and a positive dispersion slope. The second optical fiber type has a negative dispersion and a negative dispersion slope. The third optical fiber type has one from the group of (1) a positive dispersion and a negative dispersion slope, and (2) a negative dispersion and a positive dispersion slope.

    摘要翻译： 一种装置包括包括可操作耦合的光纤段的光子链路。 光纤段由第一光纤类型，第二光纤类型和第三光纤类型组成。 第一光纤类型具有正色散和正色散斜率。 第二光纤类型具有负色散和负色散斜率。 第三种光纤类型具有（1）正色散和负色散斜率的组中的一种，以及（2）负色散和正色散斜率。

    Method and apparatus to measure gain spectra of erbium doped fiber amplifier
    14.
    发明授权
    Method and apparatus to measure gain spectra of erbium doped fiber amplifier 失效
    测量掺铒光纤放大器增益谱的方法和装置

    公开(公告)号：US06731381B2

    公开(公告)日：2004-05-04

    申请号：US09794837

    申请日：2001-02-27

    申请人： Chinlon Lin ,  Michael Mills ,  Morten Nissov

    发明人： Chinlon Lin ,  Michael Mills ,  Morten Nissov

    IPC分类号： G01N2100

    CPC分类号： H04B10/0731 ,  H01S3/0014 ,  H01S3/06754 ,  H01S3/1608

    摘要： A test apparatus includes a broadband noise source, a test station, and a spectrum analyzer. A method using the test apparatus to measure the spectral gain of an erbium doped fiber amplifier (EDFA) under test includes steps of providing an optical signal from a broadband noise source to an input of the EDFA under test, measuring a power at a test wavelength at an output of the EDFA under test, adjusting the test wavelength, and repeating the steps of measuring and adjusting for a predetermined number of times.

    摘要翻译： 测试装置包括宽带噪声源，测试台和频谱分析仪。 使用测试装置测量被测掺铒光纤放大器（EDFA）的光谱增益的方法包括以下步骤：将宽带噪声源的光信号提供给被测EDFA的输入，测量测试波长的功率 在测试的EDFA的输出端，调整测试波长，并重复测量和调整预定次数的步骤。

    Extended band erbium doped fiber amplifier
    15.
    发明授权
    Extended band erbium doped fiber amplifier 有权
    扩展带掺铒光纤放大器

    公开(公告)号：US06396624B1

    公开(公告)日：2002-05-28

    申请号：US09480255

    申请日：2000-01-11

    申请人： Morten Nissov ,  Bo Pedersen

    发明人： Morten Nissov ,  Bo Pedersen

    IPC分类号： H01S300

    CPC分类号： H01S3/06754 ,  H01S3/06758 ,  H01S3/10023 ,  H01S2301/04

    摘要： An optical amplifier includes first, second and third amplifier stages, a first equalizer coupled between the first and second amplifier stages, a second equalizer coupled between the second and third amplifier stages, and a third equalizer coupled between an amplifier output and the third amplifier stage. The first stage includes a length of first erbium doped fiber coupled between an input and the first equalizer. The second stage includes a second erbium doped fiber coupled between the first equalizer and the second equalizer. The third stage includes a third erbium doped fiber coupled between the second equalizer and the third equalizer.

    摘要翻译： 光放大器包括第一，第二和第三放大器级，耦合在第一和第二放大器级之间的第一均衡器，耦合在第二和第三放大器级之间的第二均衡器，以及耦合在放大器输出和第三放大器级之间的第三均衡器 。 第一级包括耦合在输入端和第一均衡器之间的第一掺铒光纤的长度。 第二级包括耦合在第一均衡器和第二均衡器之间的第二掺铒光纤。 第三级包括耦合在第二均衡器和第三均衡器之间的第三掺铒光纤。

    Lightwave transmission system employing raman and rare-earth doped fiber amplification
    16.
    发明授权
    Lightwave transmission system employing raman and rare-earth doped fiber amplification 失效
    光波传输系统采用拉曼和稀土掺杂光纤放大

    公开(公告)号：US6038356A

    公开(公告)日：2000-03-14

    申请号：US937896

    申请日：1997-09-25

    申请人： Franklin W. Kerfoot, III ,  Morten Nissov

    发明人： Franklin W. Kerfoot, III ,  Morten Nissov

    IPC分类号： H04B10/17 ,  G02B6/28

    CPC分类号： H04B10/2935 ,  H04B10/2916

    摘要： A method is provided for transmitting an optical signal in an optical communication system. The system includes a transmitter for generating the optical signal, a receiver for detecting the signal, and an optical fiber communication link interposed between the transmitter and receiver. The optical fiber communication link includes transmission optical fibers concatenated with a plurality of Raman amplifiers and at least one rare earth doped optical fiber amplifier. The method includes the steps of: amplifying the optical signal as it advances through each of the plurality of Raman amplifiers; and compensating for variations in transmission path losses to restore the optical signal to a nominal power level as it advances through the rare earth doped optical fiber amplifier by maintaining the doped optical fiber amplifier in its saturated state.

    摘要翻译： 提供一种在光通信系统中发送光信号的方法。 该系统包括用于产生光信号的发射机，用于检测信号的接收机和插入在发射机和接收机之间的光纤通信链路。 光纤通信链路包括与多个拉曼放大器和至少一个稀土掺杂光纤放大器连接的传输光纤。 该方法包括以下步骤：当光信号前进通过多个拉曼放大器中的每一个时，放大光信号; 并且补偿传输路径损耗的变化，以便通过将掺杂的光纤放大器维持在其饱和状态，当光信号前进通过稀土掺杂光纤放大器时，将光信号恢复到额定功率电平。

    Raman assisted EDFA system and method
    18.
    发明授权
    Raman assisted EDFA system and method 失效
    拉曼辅助EDFA系统和方法

    公开(公告)号：US07274880B2

    公开(公告)日：2007-09-25

    申请号：US09991126

    申请日：2001-11-16

    申请人： Morten Nissov ,  Alexei A. Pilipetskii ,  Ekaterina Golovchenko ,  Jonathan Nagel ,  Sergey Ten

    发明人： Morten Nissov ,  Alexei A. Pilipetskii ,  Ekaterina Golovchenko ,  Jonathan Nagel ,  Sergey Ten

    IPC分类号： H04B10/00

    CPC分类号： H04B10/2916 ,  H04B2210/003

    摘要： A system, amplifier and method are provided for amplifying an optical signal in an optical communications system where spans between amplifiers may vary. The system includes a Raman amplifier variable gain portion and an EDFA gain portion. The amount of Raman amplifier gain is chosen to trade off accumulation of noise with accumulation of multi-path interference. This variable Raman gain is used to equalize the loss of each span so that the amount of optical power supplied at the input of the EDFA gain portion is substantially constant throughout the system.

    摘要翻译： 提供了一种用于放大光通信系统中的光信号的系统，放大器和方法，其中放大器之间的跨度可以变化。 该系统包括拉曼放大器可变增益部分和EDFA增益部分。 选择拉曼放大器增益的量来折算多路径干扰累积的噪声累积。 该可变拉曼增益用于均衡每个跨度的损耗，使得在EDFA增益部分的输入处提供的光功率的量在整个系统中基本上是恒定的。

    System and method for adjusting soft decision thresholds in a soft-decision error correction system
    20.
    发明申请
    System and method for adjusting soft decision thresholds in a soft-decision error correction system 失效
    用于在软判决纠错系统中调整软决策阈值的系统和方法

    公开(公告)号：US20050154955A1

    公开(公告)日：2005-07-14

    申请号：US10972289

    申请日：2004-10-22

    申请人： Yi Cai ,  Alexei Pilipetskii ,  Morten Nissov

    发明人： Yi Cai ,  Alexei Pilipetskii ,  Morten Nissov

    IPC分类号： G06F20060101 ,  G06F11/00 ,  G06F11/30 ,  G08C25/00 ,  H03M13/00 ,  H03M13/45 ,  H04B3/46 ,  H04B10/06 ,  H04B17/00 ,  H04L1/00 ,  H04Q1/20

    CPC分类号： H03M13/45

    摘要： The soft decision thresholds in a soft decision forward error correction (FEC) system may be adjusted based on mutual information of a detected signal. In one embodiment, a recursive algorithm may be used to optimize threshold values by maximizing the mutual information. In another embodiment, an adaptive scheme may be used to optimize threshold values based on a pre-knowledge of the noise in the channel. In a further embodiment, an adaptive scheme may be used to optimize threshold values by without pre-knowledge of the noise in the channel.

    摘要翻译： 可以基于检测到的信号的相互信息来调整软判决前向纠错（FEC）系统中的软判决阈值。 在一个实施例中，可以使用递归算法来通过使互信息最大化来优化阈值。 在另一个实施例中，可以使用自适应方案来基于信道中噪声的预先了解来优化阈值。 在另一个实施例中，可以使用自适应方案来通过没有对信道中的噪声的预先知识来优化阈值。