公开(公告)号：US09673901B2

公开(公告)日：2017-06-06

申请号：US15050323

申请日：2016-02-22

申请人： Attochron, LLC

发明人： Tom Chaffee ,  Paul F. Szajowski ,  Isaac Kim ,  Alexandre Braga

IPC分类号： H04B7/00 ,  H04B10/112 ,  H04B10/11 ,  H04B10/40 ,  H04B10/50 ,  H04J14/02 ,  H04J14/06

CPC分类号： H04B10/1123 ,  H04B10/11 ,  H04B10/1121 ,  H04B10/255 ,  H04B10/40 ,  H04B10/503 ,  H04B10/80 ,  H04J14/02 ,  H04J14/06

摘要： Enhancements in optical beam propagation performance can be realized through the utilization of ultra-short pulse laser (USPL) sources for laser transmit platforms, which are can be used throughout the telecommunication network infrastructure fabric. One or more of the described and illustrated features of USPL free space-optical (USPL-FSO) laser communications can be used in improving optical propagation through the atmosphere, for example by mitigating optical attenuation and scintillation effects, thereby enhancing effective system availability as well as link budget considerations, as evidenced through experimental studies and theoretical calculations between USPL and fog related atmospheric events.

公开(公告)号：US09419744B2

公开(公告)日：2016-08-16

申请号：US14418286

申请日：2013-05-07

申请人： NEC Corporation

发明人： Yoshihisa Inada

IPC分类号： H04B10/00 ,  H04J14/00 ,  H04J14/06 ,  H04B10/255 ,  H04B10/2557 ,  H04B10/548 ,  H04B10/50 ,  H04B10/532 ,  H04L27/20 ,  H04J14/04

CPC分类号： H04J14/06 ,  H04B10/255 ,  H04B10/2557 ,  H04B10/5053 ,  H04B10/532 ,  H04B10/548 ,  H04J14/00 ,  H04J14/04 ,  H04L27/2096

摘要： A polarization multiplexing optical transmitter of the present invention includes frequency dividing means (21) that performs frequency dividing on a clock signal having a Baud rate frequency, phase modulation means (8) that performs phase modulation on a light signal in accordance with the clock signal having undergone the frequency dividing, branching means (2) that branches the phase-modulated light into two light signals, delay means (10) that delays one branched light signal relative to the other branched light signal to generate light signals having phases inverted relative to each other, and polarization multiplexing means (5) that synthesizes the generated signals lights with orthogonal polarizations to generate a polarization multiplexed signal. Hence, the polarization multiplexing optical transmitter that can further improve the signal quality can be accomplished.

摘要翻译： 本发明的偏振复用光发射机包括对具有波特率频率的时钟信号进行分频的分频装置（21），根据时钟信号对光信号执行相位调制的相位调制装置（8） 已经进行了分频，将相位调制光分支成两个光信号的分支装置（2）;延迟装置（10），其相对于另一个分支光信号延迟一个分支光信号，以产生具有相对于 以及利用正交偏振合成产生的信号的偏振复用装置（5），以产生偏振复用信号。 因此，可以实现能够进一步提高信号质量的偏振复用光发送器。

公开(公告)号：US08886056B2

公开(公告)日：2014-11-11

申请号：US13221312

申请日：2011-08-30

申请人： Lei Li ,  Zhenning Tao ,  Takeshi Hoshida

发明人： Lei Li ,  Zhenning Tao ,  Takeshi Hoshida

IPC分类号： H04B10/00 ,  H04B10/255 ,  H04B10/61 ,  H04B10/079

CPC分类号： H04B10/0795 ,  H04B10/255 ,  H04B10/6163

摘要： The present invention provides apparatus for self-phase modulation noise calculation, apparatus for self-phase modulation noise elimination and optical coherent receiver. The apparatus for calculation comprises: a signal receiver to receive an input signal; a calculator connected to the signal receiver to calculate a self-phase modulation noise at the current instant by using the signal powers of an input signal waveform at the current instant and at several sampling instants adjacent to the current instant. The embodiments of the present invention calculates the self-phase modulation noise at a certain instant by using the signal powers at a plurality of digital sampling periods before and after this instant, and when the apparatus is used to calculate the self-phase modulation noise of each of the sub-spans in an optical fiber transmission link, in case that the calculation precision is ensured, the granularity of the sub-spans may be reduced, thereby lowering the complexity of the calculation.

摘要翻译： 本发明提供了用于自相位调制噪声计算的装置，用于自相位调制噪声消除的装置和光学相干接收机。 该计算装置包括：接收输入信号的信号接收器; 连接到信号接收器的计算器，通过使用当前时刻的输入信号波形的信号功率和与当前时刻相邻的几个采样时刻来计算当前时刻的自相位调制噪声。 本发明的实施例通过在该时刻之前和之后的多个数字采样周期中使用信号功率来计算某一时刻的自相位调制噪声，并且当该装置用于计算自相位调制噪声的自相位调制噪声 在光纤传输链路中的每个子跨度，在确保计算精度的情况下，可能减小子跨度的粒度，从而降低计算的复杂度。

公开(公告)号：US20130182620A1

公开(公告)日：2013-07-18

申请号：US13737898

申请日：2013-01-09

申请人： ATTOCHRON LLC

发明人： Tom Chaffee ,  Paul F. Szajowski ,  Isaac Kim ,  Alexandre Braga

IPC分类号： H04B10/11

CPC分类号： H04B10/1123 ,  H04B10/11 ,  H04B10/1121 ,  H04B10/255 ,  H04B10/40 ,  H04B10/503 ,  H04B10/80 ,  H04J14/02 ,  H04J14/06

摘要： Enhancements in optical beam propagation performance can be realized through the utilization of ultra-short pulse laser (USPL) sources for laser transmit platforms, which are can be used throughout the telecommunication network infrastructure fabric. One or more of the described and illustrated features of USPL free space-optical (USPL-FSO) laser communications can be used in improving optical propagation through the atmosphere, for example by mitigating optical attenuation and scintillation effects, thereby enhancing effective system availability as well as link budget considerations, as evidenced through experimental studies and theoretical calculations between USPL and fog related atmospheric events.

摘要翻译： 可以通过利用激光发射平台的超短脉冲激光源（USPL）源实现光束传播性能的提高，这些源可以在整个电信网络基础结构中使用。 可以使用USPL自由空间光（USPL-FSO）激光通信的所描述和示出的一个或多个特征来改善通过大气的光传播，例如通过减轻光衰减和闪烁效应，从而提高有效的系统可用性 作为链接预算的考虑，通过USPL与雾相关大气事件的实验研究和理论计算证明。

公开(公告)号：US20120051742A1

公开(公告)日：2012-03-01

申请号：US13221312

申请日：2011-08-30

申请人： Lei LI ,  Zhenning TAO ,  Takeshi HOSHIDA

发明人： Lei LI ,  Zhenning TAO ,  Takeshi HOSHIDA

IPC分类号： H04B10/08 ,  H04B10/04 ,  H04B10/00 ,  H04B10/06

CPC分类号： H04B10/0795 ,  H04B10/255 ,  H04B10/6163

摘要： The present invention provides apparatus for self-phase modulation noise calculation, apparatus for self-phase modulation noise elimination and optical coherent receiver. The apparatus for calculation comprises: a signal receiver to receive an input signal; a calculator connected to the signal receiver to calculate a self-phase modulation noise at the current instant by using the signal powers of an input signal waveform at the current instant and at several sampling instants adjacent to the current instant. The embodiments of the present invention calculates the self-phase modulation noise at a certain instant by using the signal powers at a plurality of digital sampling periods before and after this instant, and when the apparatus is used to calculate the self-phase modulation noise of each of the sub-spans in an optical fiber transmission link, in case that the calculation precision is ensured, the granularity of the sub-spans may be reduced, thereby lowering the complexity of the calculation.

摘要翻译： 本发明提供了用于自相位调制噪声计算的装置，用于自相位调制噪声消除的装置和光学相干接收机。 该计算装置包括：接收输入信号的信号接收器; 连接到信号接收器的计算器，通过使用当前时刻的输入信号波形的信号功率和与当前时刻相邻的几个采样时刻来计算当前时刻的自相位调制噪声。 本发明的实施例通过在该时刻之前和之后的多个数字采样周期中使用信号功率来计算某一时刻的自相位调制噪声，并且当该装置用于计算自相位调制噪声的自相位调制噪声 在光纤传输链路中的每个子跨度，在确保计算精度的情况下，可能减小子跨度的粒度，从而降低计算的复杂度。

公开(公告)号：US20100142945A1

公开(公告)日：2010-06-10

申请号：US12656686

申请日：2010-02-12

申请人： Norifumi Shukunami ,  Tatsuya Tsuzuki

发明人： Norifumi Shukunami ,  Tatsuya Tsuzuki

IPC分类号： H04B10/08

CPC分类号： G01M11/33 ,  G01M11/319 ,  H04B10/255

摘要： In an optical amplifier, an input light is supplied to one end of an optical fiber connected to an output port, and the power of a light in an opposite direction which is input to the output port from the one end of the optical fiber, is measured, thereby obtaining a stimulated Brillouin scattering (SBS) occurrence threshold in the optical fiber based on the measurement result. Then, using the SBS occurrence threshold, a relation between the input light power and an occurrence amount of the self phase modulation (SPM) or the like in the optical fiber is obtained to be reflected on a control of the optical amplifier, so that an occurrence of the SPM or the like in the optical fiber is suppressed. As a result, it becomes possible to accurately measure, with a simple configuration, the nonlinear optical properties of the optical fiber actually connected to the output port of the optical amplifier, so that the optical S/N ratio degradation due to a nonlinear optical effect can be effectively suppressed.

摘要翻译： 在光放大器中，输入光被提供到连接到输出端口的光纤的一端，并且从光纤的一端输入到输出端口的相反方向的光的功率为 测量，从而基于测量结果在光纤中获得受激布里渊散射（SBS）出现阈值。 然后，使用SBS发生阈值，获得输入光功率与光纤中的自相位调制（SPM）等的发生量之间的关系，以反映在光放大器的控制上，使得 抑制光纤中的SPM等的发生。 结果，可以以简单的结构精确地测量实际连接到光放大器的输出端口的光纤的非线性光学特性，使得由于非线性光学效应导致的光S / N比劣化 可以有效地抑制。

公开(公告)号：US07660537B2

公开(公告)日：2010-02-09

申请号：US11367141

申请日：2006-03-03

申请人： Daniel A. Fishman ,  Xiang Liu

发明人： Daniel A. Fishman ,  Xiang Liu

IPC分类号： H04B10/04

CPC分类号： H04B10/255 ,  H04B10/2513 ,  H04B2210/254

摘要： The present invention includes a fast algorithm to compute the pre-equalized waveform for simultaneous compensation of the self-phase modulation and chromatic dispersion experienced by a high-speed optical signal, e.g., at 10 Gb/s, and shows that it is used for an automatic self-adapting pre-equalization when the knowledge on transmission link details is inaccurate or incomplete.

摘要翻译： 本发明包括一种快速算法，用于计算用于同时补偿由高速光信号（例如，10Gb / s）所经历的自相位调制和色散的预均衡波形，并且示出其用于 当传输链路细节的知识不准确或不完整时，自动自适应预均衡。

公开(公告)号：US20020114040A1

公开(公告)日：2002-08-22

申请号：US10004789

申请日：2001-12-07

申请人： FUJITSU LIMITED

发明人： Shigeki Watanabe

IPC分类号： H04B010/00 ,  H04B010/12

CPC分类号： H04B10/255 ,  G02F1/3538 ,  H04B10/2531

摘要： An optical communication system which uses optical phase conjugation to compensate for chromatic dispersion and optical Kerr effect. The optical communication system includes a first fiber, a phase conjugator, and a second fiber. The first fiber transmits a light signal therethrough, and is a polarization maintaining fiber. The light signal is a linear polarized wave. The phase conjugator receives the light signal from the first fiber and produces a corresponding phase conjugate light signal. The second fiber receives the phase conjugate light signal from the phase conjugator and transmits the phase conjugate light signal therethrough. A wavelength division multiplexing optical communication system is also provided which uses optical phase conjugation to compensate for dispersion and optical Kerr effect.

公开(公告)号：US06252688B1

公开(公告)日：2001-06-26

申请号：US09438147

申请日：1999-11-10

申请人： George Ishikawa ,  Hideyuki Miyata ,  Hiroshi Onaka ,  Motoyoshi Sekiya ,  Kazue Okazaki

发明人： George Ishikawa ,  Hideyuki Miyata ,  Hiroshi Onaka ,  Motoyoshi Sekiya ,  Kazue Okazaki

IPC分类号： H04J1402

CPC分类号： G02B6/29377 ,  G02B6/4215 ,  H04B10/25133 ,  H04B10/2525 ,  H04B10/25253 ,  H04B10/255 ,  H04B10/2563 ,  H04B2210/252 ,  H04B2210/254 ,  H04B2210/258 ,  H04J14/02 ,  H04J14/0224

摘要： The invention provides an optical wavelength multiplex transmission method wherein a band in the proximity of a zero dispersion wavelength of an optical fiber is used and optical signals are disposed at efficient channel spacings taking an influence of the band, the wavelength dispersion and the four wave mixing into consideration to realize an optical communication system of an increased capacity which is not influenced by crosstalk by FWM. When optical signals of a plurality of channels having different wavelengths are to be multiplexed and transmitted using an optical fiber, a four wave mixing suppressing guard band of a predetermined bandwidth including the zero-dispersion wavelength &lgr;0 of the optical fiber is set, and signal light waves of the plurality of channels to be multiplexed are arranged on one of the shorter wavelength side and the longer wavelength side outside the guard band.

公开(公告)号：US06252687B1

公开(公告)日：2001-06-26

申请号：US09066580

申请日：1998-04-27

申请人： George Ishikawa ,  Hideyuki Miyata ,  Hiroshi Onaka ,  Motoyoshi Sekiya ,  Kazue Otsuka

发明人： George Ishikawa ,  Hideyuki Miyata ,  Hiroshi Onaka ,  Motoyoshi Sekiya ,  Kazue Otsuka

IPC分类号： H04J1402

CPC分类号： G02B6/29377 ,  G02B6/4215 ,  H04B10/25133 ,  H04B10/2525 ,  H04B10/25253 ,  H04B10/255 ,  H04B10/2563 ,  H04B2210/252 ,  H04B2210/254 ,  H04B2210/258 ,  H04J14/02 ,  H04J14/0224

摘要： The invention provides an optical wavelength multiplex transmission method wherein a band in the proximity of a zero dispersion wavelength of an optical fiber is used and optical signals are disposed at efficient channel spacings taking an influence of the band, the wavelength dispersion and the four wave mixing into consideration to realize an optical communication system of an increased capacity which is not influenced by crosstalk by FWM. When optical signals of a plurality of channels having different wavelengths are to be multiplexed and transmitted using an optical fiber, a four wave mixing suppressing guard band of a predetermined bandwidth including the zero-dispersion wavelength &lgr;0 of the optical fiber is set, and signal light waves of the plurality of channels to be multiplexed are arranged on one of the shorter wavelength side and the longer wavelength side outside the guard band.