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。

公开(公告)号：US20060216035A1

公开(公告)日：2006-09-28

申请号：US09991154

申请日：2001-11-16

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

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

IPC分类号： H04B10/12

CPC分类号： H04B10/25253

摘要： A method of compensating for chromatic dispersion in an optical signal transmitted on a long-haul terrestrial optical communication system including a plurality of spans, including: allowing chromatic dispersion to accumulate over at least one of the spans to a first predetermined level; and compensating for the first pre-determined level of dispersion using a dispersion compensating fiber causing accumulation of dispersion to a second predetermined level. There is also provided a hybrid Raman/EDFA amplifier including a Raman portion and an EDFA portion with a dispersion compensating fiber disposed therebetween. An optical communication system and a method of communicating an optical signal using such a Raman/EDFA amplifier are also provided.

摘要翻译： 一种补偿在包括多个跨度的长途陆地光通信系统中发送的光信号中的色散的方法，包括：允许色散在所述跨度中的至少一个上积累到第一预定水平; 以及使用使色散累积到第二预定水平的色散补偿光纤来补偿第一预定等级的色散。 还提供了包括拉曼部分和EDFA部分的混合拉曼/ EDFA放大器，其间布置有色散补偿光纤。 还提供了一种光通信系统和使用这种拉曼/ EDFA放大器传送光信号的方法。

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。

公开(公告)号：US20060204171A1

公开(公告)日：2006-09-14

申请号：US11363511

申请日：2006-02-27

申请人： Jin-Xing Cai ,  Dmitri Foursa ,  Carl Davidson ,  Alexei Pilipetskii ,  Morten Nissov ,  Neal Bergano

发明人： Jin-Xing Cai ,  Dmitri Foursa ,  Carl Davidson ,  Alexei Pilipetskii ,  Morten Nissov ,  Neal Bergano

IPC分类号： G02B6/28

CPC分类号： H04B10/25253 ,  G02B6/29376 ,  H04B10/25133

摘要： A WDM optical transmission system and method uses slope compensation at the transmit terminal and/or the receive terminal. The system and method may be used with modulation formats with a short pulse width and a broad optical spectrum.

摘要翻译： WDM光传输系统和方法在发射终端和/或接收终端处使用斜率补偿。 该系统和方法可以使用具有短脉冲宽度和宽光谱的调制格式。

公开(公告)号：US20110318019A1

公开(公告)日：2011-12-29

申请号：US12825585

申请日：2010-06-29

申请人： Morten Nissov ,  Alexei Pilipetskii ,  Neal Bergano

发明人： Morten Nissov ,  Alexei Pilipetskii ,  Neal Bergano

IPC分类号： H04B10/00

CPC分类号： H04B10/697 ,  H04B10/2513 ,  H04B2210/252 ,  H04B2210/254

摘要： The present disclosure is directed to managing dispersion compensation in optical transmission line utilizing single mode fiber with no in-line dispersion compensation. A communication system terminal includes one or more dispersion compensation modules configured to compensate for at least a portion of optical dispersion associated with optical data signals supplied from the transmission line. A receiver communicatively coupled to the transmission line includes a digital signal processor configured to compensate for an additional portion of dispersion associated with the optical data signals converted to electrical signals by the receiver.

摘要翻译： 本公开涉及利用不具有在线色散补偿的单模光纤来管理光传输线中的色散补偿。 通信系统终端包括被配置为补偿与从传输线提供的光数据信号相关联的至少一部分光学色散的一个或多个色散补偿模块。 通信地耦合到传输线的接收机包括数字信号处理器，其被配置为补偿与由接收机转换成电信号的光学数据信号相关联的色散的附加部分。

公开(公告)号：US20060029398A1

公开(公告)日：2006-02-09

申请号：US10913915

申请日：2004-08-06

申请人： Li Liu ,  Alexei Pilipetskii ,  William Anderson ,  Jin-Xing Cai ,  Morten Nissov

发明人： Li Liu ,  Alexei Pilipetskii ,  William Anderson ,  Jin-Xing Cai ,  Morten Nissov

IPC分类号： H04B10/04

CPC分类号： H04J14/02 ,  H04B10/506 ,  H04B10/5161 ,  H04J14/0224

摘要： A method and apparatus for transmitting optical signals of different modulation formats in distinct bands. The optical signals within each band may be separated by a predetermined channel spacing, and the distinct bands may be separated by a predetermined band separation distance. The band separation distance may be about twice the predetermined channel spacing.

摘要翻译： 一种在不同频带中发送不同调制格式的光信号的方法和装置。 每个频带内的光信号可以被预定的信道间隔分开，并且不同的频带可以被隔开预定的频带间隔距离。 频带分离距离可以是预定信道间隔的大约两倍。

公开(公告)号：US20070183787A1

公开(公告)日：2007-08-09

申请号：US11734987

申请日：2007-04-13

申请人： Jin-Xing Cai ,  Dmitri Foursa ,  Carl Davidson ,  Alexei Pilipetskii ,  Morten Nissov ,  Neal Bergano

发明人： Jin-Xing Cai ,  Dmitri Foursa ,  Carl Davidson ,  Alexei Pilipetskii ,  Morten Nissov ,  Neal Bergano

IPC分类号： H04B10/12

CPC分类号： H04B10/25253 ,  G02B6/29376 ,  H04B10/25133

摘要： A WDM optical transmission system and method uses slope compensation at the transmit terminal and/or the receive terminal. The system and method may be used with modulation formats with a short pulse width and a broad optical spectrum.

摘要翻译： WDM光传输系统和方法在发射终端和/或接收终端处使用斜率补偿。 该系统和方法可以使用具有短脉冲宽度和宽光谱的调制格式。

公开(公告)号：US20050180757A1

公开(公告)日：2005-08-18

申请号：US09991126

申请日：2001-11-16

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

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

IPC分类号： H04B10/12 ,  H04B10/17

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。

公开(公告)号：US20050199787A1

公开(公告)日：2005-09-15

申请号：US10796930

申请日：2004-03-10

申请人： Hongbin Zhang ,  Li Liu ,  R. Jander ,  Alexei Pilipetskii

发明人： Hongbin Zhang ,  Li Liu ,  R. Jander ,  Alexei Pilipetskii

IPC分类号： G02B26/00 ,  G02F1/01 ,  G01J4/00 ,  H01J40/14

CPC分类号： G02F1/0136

摘要： Methods and apparatus of performing polarization control for optical transmissions are provided. The methods and apparatus enable polarization control devices to achieve a desired output state of polarization regardless of the input state of polarization. The desires state of polarization can be achieved by rotating waveplates in a polarization controller in a sequential fashion. Each waveplate may be continually adjusted or dithered so long as the feedback signal satisfies a feedback condition. Once the feedback signal exceeds the feedback condition, the next waveplate in the polarization controller is adjusted. This enables the methods and apparatus to rapidly adjust the state of polarization away from dead spots and minimize loss control problems.

摘要翻译： 提供了进行光传输的偏振控制的方法和装置。 该方法和装置使得偏振控制装置能够实现期望的输出极化状态，而与偏振的输入状态无关。 可以通过以顺序方式在偏振控制器中旋转波片来实现偏振的欲望状态。 只要反馈信号满足反馈条件，每个波片可以被连续地调节或抖动。 一旦反馈信号超过反馈条件，调整偏振控制器中的下一个波片。 这使得方法和装置能够将极化状态快速地调整为远离死点并最小化损失控制问题。

公开(公告)号：US20070009265A1

公开(公告)日：2007-01-11

申请号：US11530270

申请日：2006-09-08

申请人： Neal Bergano ,  Alexei Pilipetskii ,  M. Hayee

发明人： Neal Bergano ,  Alexei Pilipetskii ,  M. Hayee

IPC分类号： H04B10/00

CPC分类号： H04B10/671 ,  H04J14/02 ,  H04J14/06

摘要： An optical communication system configured to operate with optical signals at lower signal to noise ratios than previously contemplated. The communication system includes a receiver having an optical pre-processor coupled between a demultiplexer and a detector. The optical pre-processor includes either an optical polarization section having a polarization rotator and an optical polarizer, a phase modulation section that includes a phase modulator and a dispersion element and a clock recovery circuit, or an amplitude modulation section that includes an amplitude modulator clock recovery circuit and a spectral shaping filter. A method of communication includes transmitting an optical signal into the system and receiving the signal at a reduced signal-to-noise ratio through a transmission media, demultiplexing the optical transmission signal into a first optical signal, and pre-processing the first optical signal to form a first pre-processed signal by either rotating a polarization of the first optical signal, compressing a pulse in the first optical signal, or modulating an amplitude of a pulse in the first optical signal. The method then detects the first pre-processed signal to form an electrical signal. A reference signal-to-noise ratio is defined as a signal-to-noise ratio of a received signal that would produce a predetermined bit error rate in the electrical signal if the signal-to-noise ratio were to be determined with the pre-processing step omitted. The reduced signal-to-noise ratio is less than the reference signal-to-noise ratio, and a bit error rate in the electrical signal is less than the predetermined bit error rate when the step of transmitting transmits at the reduced signal-to-noise ratio.

摘要翻译： 光通信系统被配置为以比先前预期的更低的信噪比操作光信号。 通信系统包括具有耦合在解复用器和检测器之间的光学预处理器的接收机。 光学预处理器包括具有偏振旋转器和光偏振器的光偏振部分，包括相位调制器和色散元件的相位调制部分和时钟恢复电路，或包括振幅调制器时钟 恢复电路和频谱整形滤波器。 一种通信方法包括：将光信号发射到系统中，并通过传输介质以降低的信噪比接收信号，将光传输信号解复用为第一光信号，并将第一光信号预处理成 通过旋转第一光信号的偏振，压缩第一光信号中的脉冲或调制第一光信号中的脉冲幅度来形成第一预处理信号。 该方法然后检测第一预处理信号以形成电信号。 参考信噪比被定义为如果信号噪声比要用预编码器确定的，则在电信号中将产生预定误比特率的接收信号的信噪比， 处理步骤省略。 降低的信噪比小于参考信噪比，并且当发送的发送步骤以降低的信号 - 噪声比传输时，电信号中的误码率小于预定的误码率， 噪音比。