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    Extended band erbium doped fiber amplifier
    1.
    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

    Applicant: Morten Nissov ,  Bo Pedersen

    Inventor： Morten Nissov ,  Bo Pedersen

    IPC: H01S300

    CPC classification number: H01S3/06754 ,  H01S3/06758 ,  H01S3/10023 ,  H01S2301/04

    Abstract: 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.

    Abstract translation: 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。

    Hybrid Raman/erbium-doped fiber amplifier and transmission system with dispersion map
    2.
    发明授权
    Hybrid Raman/erbium-doped fiber amplifier and transmission system with dispersion map 失效
    混合拉曼/掺铒光纤放大器和传输系统的色散图

    公开(公告)号：US07085039B2

    公开(公告)日：2006-08-01

    申请号：US10389373

    申请日：2003-03-14

    Applicant: Dmitri Foursa ,  Morten Nissov ,  Alexei N. Pilipetskii ,  Michael A. Mills ,  Chinlon Lin ,  Bo Pedersen

    Inventor： Dmitri Foursa ,  Morten Nissov ,  Alexei N. Pilipetskii ,  Michael A. Mills ,  Chinlon Lin ,  Bo Pedersen

    IPC: H04B10/12

    CPC classification number: H01S3/06754 ,  H01S3/06725 ,  H01S3/06758 ,  H01S3/094003 ,  H01S3/1608 ,  H01S3/2375 ,  H01S3/302 ,  H01S2301/04

    Abstract: A hybrid Raman-EDFA provides gain equalization over the C-band and L-band. The hybrid Raman-EDFA includes a Raman section producing a Raman gain and an EDFA section producing an EDFA gain complementing the Raman gain. The EDFA section preferably includes a highly inverted, single-stage EDFA to produce the complementing EDFA gain shape. One embodiment of the EDFA section includes a high return loss termination located after the erbium fiber to receive unabsorbed pump power. Multiple hybrid Raman-EDFAs can be connected in an amplifier chain in a transmission system. The transmission system preferably provides a dispersion map including regular composite fiber spans followed by at least one compensating span of negative dispersion fibers. The Raman sections of the hybrid Raman-EDFAs are preferably coupled to negative dispersion fiber in the transmission system.

    Abstract translation: 混合拉曼EDFA提供C波段和L波段的增益均衡。 混合拉曼EDFA包括产生拉曼增益的拉曼部分和产生补偿拉曼增益的EDFA增益的EDFA部分。 EDFA部分优选地包括高反转的单级EDFA以产生补充EDFA增益形状。 EDFA部分的一个实施例包括位于铒光纤之后的高回波损耗终端以接收未吸收的泵浦功率。 多个混合拉曼EDFA可以连接在传输系统的放大器链中。 传输系统优选地提供包括常规复合纤维跨度的色散图，随后是负色散光纤的至少一个补偿跨度。 混合拉曼EDFA的拉曼段优选耦合到传输系统中的负色散光纤。

    System and method for adjusting soft decision thresholds in a soft-decision error correction system
    5.
    发明授权
    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：US07363553B2

    公开(公告)日：2008-04-22

    申请号：US10972289

    申请日：2004-10-22

    Applicant: Yi Cai ,  Alexei N. Pilipetskii ,  Morten Nissov

    Inventor： Yi Cai ,  Alexei N. Pilipetskii ,  Morten Nissov

    IPC: H03M13/00

    CPC classification number: H03M13/45

    Abstract: 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.

    Abstract translation: 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。

    Method and apparatus for optimizing the dispersion and dispersion slope for a dispersion map with slope-compensating optical fibers
    6.
    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

    Applicant: Alexei Pilipetskii ,  Matthew Ma ,  Morten Nissov

    Inventor： Alexei Pilipetskii ,  Matthew Ma ,  Morten Nissov

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

    CPC classification number: G02B6/29376 ,  H04B10/25253

    Abstract: 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.

    Abstract translation: 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
    7.
    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

    Applicant: Chinlon Lin ,  Michael Mills ,  Morten Nissov

    Inventor： Chinlon Lin ,  Michael Mills ,  Morten Nissov

    IPC: G01N2100

    CPC classification number: H04B10/0731 ,  H01S3/0014 ,  H01S3/06754 ,  H01S3/1608

    Abstract: 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.

    Abstract translation: 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。

    Lightwave transmission system employing raman and rare-earth doped fiber amplification
    8.
    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

    Applicant: Franklin W. Kerfoot, III ,  Morten Nissov

    Inventor： Franklin W. Kerfoot, III ,  Morten Nissov

    IPC: H04B10/17 ,  G02B6/28

    CPC classification number: H04B10/2935 ,  H04B10/2916

    Abstract: 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.

    Abstract translation: 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。

    Detection of Data in Signals with Data Pattern Dependent Signal Distortion
    9.
    发明申请
    Detection of Data in Signals with Data Pattern Dependent Signal Distortion 有权
    用数据模式相关信号失真检测信号中的数据

    公开(公告)号：US20100232809A1

    公开(公告)日：2010-09-16

    申请号：US12718132

    申请日：2010-03-05

    Applicant: Yi Cai ,  Morten Nissov ,  Alexei N. Pilipetskii

    Inventor： Yi Cai ,  Morten Nissov ,  Alexei N. Pilipetskii

    IPC: H04B10/06 ,  H04L27/00

    CPC classification number: H04J14/02 ,  H04B10/2507 ,  H04B10/697 ,  H04J14/0279

    Abstract: A detection system and method may be used to detect data transmitted in a signal with data pattern dependent signal distortion. In general, a detection system and method compares samples of a received signal with stored samples of distorted signals associated with known data patterns and selects the known data patterns that correspond most closely with the samples of the received signal. The detection system and method may thus mitigate the effects of data pattern dependent signal distortion.

    Abstract translation: 可以使用检测系统和方法来检测在具有数据模式相关信号失真的信号中发送的数据。 通常，检测系统和方法将接收信号的样本与已知数据模式相关联的失真信号的存储样本进行比较，并且选择与接收信号的采样最紧密对应的已知数据模式。 因此，检测系统和方法可以减轻数据模式相关信号失真的影响。

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