公开(公告)号：US6160942A

公开(公告)日：2000-12-12

申请号：US300237

申请日：1999-04-27

申请人： Shigeki Watanabe

发明人： Shigeki Watanabe

IPC分类号： H04B10/18 ,  G02B6/00 ,  H04J14/00

CPC分类号： H04B10/2531 ,  H04B10/255

摘要： Optical phase conjugation is applied to an optical fiber communication system. The system comprises a transmitter for outputting signal light, a phase conjugator, a receiver, a first single mode fiber laid between the transmitter and the phase conjugator, and a second single mode fiber laid between the phase conjugator and the receiver, wherein parameters such as signal light frequencies in the fibers are set adequately. This system is capable of compensating for any waveform distortion derived from chromatic dispersion and optical Kerr effect.

摘要翻译： 光学相位共轭应用于光纤通信系统。 该系统包括用于输出信号光的发射器，相位共轭器，接收器，布置在发射器和相位共轭器之间的第一单模光纤，以及布置在相位共轭器和接收器之间的第二单模光纤，其中诸如 纤维中的信号光频率被充分地设定。 该系统能够补偿由色散和光克尔效应导出的任何波形失真。

公开(公告)号：US6124960A

公开(公告)日：2000-09-26

申请号：US929360

申请日：1997-09-08

申请人： Dietmar Garthe ,  Ross Alexander Saunders ,  Alan Robinson ,  Maurice O'Sullivan ,  Rongqing Hui

发明人： Dietmar Garthe ,  Ross Alexander Saunders ,  Alan Robinson ,  Maurice O'Sullivan ,  Rongqing Hui

IPC分类号： G02F1/01 ,  H04B3/06 ,  H04B10/02 ,  H04B10/18 ,  H04B10/04

CPC分类号： H04B10/25137 ,  H04B10/255 ,  H04B10/2557

摘要： In a WDM transmission system carrying amplitude modulated traffic in which significant cross-phase modulation occurs, each of the individual channels is pre-chirped at the transmitter with replicas, or low-pass filtered replicas of the amplitude modulation applied to each of the other channels. Prechirping of each individual channel with a replica of the amplitude modulation applied to that channel may be added in order additionally to provide compensation for self-phase modulation.

摘要翻译： 在承载幅度调制业务的WDM传输系统中，发生显着的跨相位调制，各个信道在发射机处被预先啁啾，其中复制或低通滤波后的复制品被施加到每个其它信道 。 每个单独信道的预加速可以应用于该信道的幅度调制的复制品，以便额外地添加以对自相位调制提供补偿。

公开(公告)号：US5754322A

公开(公告)日：1998-05-19

申请号：US781511

申请日：1997-01-08

申请人： George Ishikawa ,  Hiroshi Nishimoto ,  Hiroki Ooi ,  Motoyoshi Sekiya ,  Hiroaki Tomofuji

发明人： George Ishikawa ,  Hiroshi Nishimoto ,  Hiroki Ooi ,  Motoyoshi Sekiya ,  Hiroaki Tomofuji

IPC分类号： H04B10/2507 ,  H04B10/071 ,  H04B10/2519 ,  H04B10/2525 ,  H04B10/2537 ,  H04B10/2563 ,  H04J14/02 ,  H04J14/08 ,  H04L7/00 ,  H04L7/027 ,  H04L7/033 ,  H04L7/06 ,  H04Q11/00 ,  H04Q11/04

CPC分类号： H04B10/25133 ,  H04B10/0795 ,  H04B10/07957 ,  H04B10/0797 ,  H04B10/0799 ,  H04B10/25137 ,  H04B10/2525 ,  H04B10/255 ,  H04B10/2563 ,  H04B10/66 ,  H04B10/67 ,  H04B10/675 ,  H04J14/086 ,  H04L7/0037 ,  H04L7/0075 ,  H04Q11/0001 ,  G02F2203/21 ,  H04B2210/252 ,  H04B2210/254 ,  H04J14/02 ,  H04J14/0298 ,  H04J14/08 ,  H04L7/027 ,  H04L7/06

摘要： The invention provides a technique for optimizing transmission conditions to achieve large-capacity transmission, and also provides peripheral techniques for the practical implementation of optical multiplexing that makes large-capacity transmission possible. A transmission characteristic is measured in a transmission characteristic measuring section, and control of signal light wavelength in a tunable light source, control of the amount of prechirping, control of the amount of dispersion compensation, and/or control of optical power are performed to achieve the best transmission characteristic. Wavelength dispersion is deliberately introduced by a dispersion compensator, to reduce nonlinear effects. A tunable laser is used to optimize signal light wavelength for each optical amplification repeater section. Peripheral techniques, such as drift compensation, clock extraction, optical signal channel identification, clock phase stabilization, etc., are provided for the implementation of optical multiplexing.

公开(公告)号：US5717510A

公开(公告)日：1998-02-10

申请号：US510474

申请日：1995-08-02

申请人： George Ishikawa ,  Hiroshi Nishimoto

发明人： George Ishikawa ,  Hiroshi Nishimoto

IPC分类号： H04B10/2507 ,  H04B10/071 ,  H04B10/2519 ,  H04B10/2525 ,  H04B10/2537 ,  H04B10/2563 ,  H04J14/02 ,  H04J14/08 ,  H04L7/00 ,  H04L7/027 ,  H04L7/033 ,  H04L7/06 ,  H04Q11/00 ,  H04Q11/04 ,  H04B10/00

CPC分类号： H04B10/25133 ,  H04B10/0795 ,  H04B10/07957 ,  H04B10/0797 ,  H04B10/0799 ,  H04B10/25137 ,  H04B10/2525 ,  H04B10/255 ,  H04B10/2563 ,  H04B10/66 ,  H04B10/67 ,  H04B10/675 ,  H04J14/086 ,  H04L7/0037 ,  H04L7/0075 ,  H04Q11/0001 ,  G02F2203/21 ,  H04B2210/252 ,  H04B2210/254 ,  H04J14/02 ,  H04J14/0298 ,  H04J14/08 ,  H04L7/027 ,  H04L7/06

摘要： The invention provides a technique for optimizing transmission conditions to achieve large-capacity transmission, and also provides peripheral techniques for the practical implementation of optical multiplexing that makes large-capacity transmission possible. A transmission characteristic is measured in a transmission characteristic measuring section, and control of signal light wavelength in a tunable light source, control of the amount of prechirping, control of the amount of dispersion compensation, and/or control of optical power are performed to achieve the best transmission characteristic. Wavelength dispersion is deliberately introduced by a dispersion compensator, to reduce nonlinear effects. A tunable laser is used to optimize signal light wavelength for each optical amplification repeater section. Peripheral techniques, such as drift compensation, clock extraction, optical signal channel identification, clock phase stabilization, etc., are provided for the implementation of optical multiplexing.

摘要翻译： 本发明提供了一种优化传输条件以实现大容量传输的技术，并且还提供了使得大容量传输成为可能的光复用的实际实现的外围技术。 在透射特性测量部分中测量传输特性，并且执行可调谐光源中的信号光波长的控制，预激励量的控制，色散补偿量的控制和/或光功率的控制，以实现 传输特性最好。 波长色散由色散补偿器故意引入，以减少非线性效应。 可调激光器用于优化每个光放大中继器部分的信号光波长。 提供了诸如漂移补偿，时钟提取，光信号通道识别，时钟相位稳定等的外围技术，用于实施光学多路复用。

公开(公告)号：US5696614A

公开(公告)日：1997-12-09

申请号：US781137

申请日：1997-01-09

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： H04J14/00 ,  G02B6/34 ,  H04B10/2507 ,  H04B10/2525 ,  H04B10/255 ,  H04B10/2563 ,  H04B10/299 ,  H04J14/02 ,  H04B10/00

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

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 .lambda..sub.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.

摘要翻译： 本发明提供一种光波长多路复用传输方法，其中使用光纤零色散波长附近的频带，并且将光信号设置在影响频带，波长色散和四波混频的有效信道间隔处 考虑到实现不受FWM串扰影响的增加容量的光通信系统。 当使用光纤复用并发送具有不同波长的多个信道的光信号时，设置包括光纤的零色散波长λ0的预定带宽的四波混频抑制保护带，并且信号 要复用的多个信道的光波被布置在保护带外部的较短波长侧和较长波长侧中的一个上。

公开(公告)号：US5539563A

公开(公告)日：1996-07-23

申请号：US253174

申请日：1994-05-31

申请人： Yong-Kwan Park

发明人： Yong-Kwan Park

IPC分类号： H04B10/02 ,  H04B10/18 ,  H04B10/00

CPC分类号： H04B10/2525 ,  H04B10/255 ,  H04B2210/252

摘要： At least one dispersion compensating fiber (DCF) is utilized to compensate for chromatic dispersion of an externally modulated signal carried by at least one single mode, standard fiber optic cable. The self phase modulation (SPM) effect in the standard fiber is characterized by a pulse compression and associated pulse distortion when a 1550 nm wavelength signal is launched into the fiber. Because the SPM effect in the DCF fiber is characterized by a pulse broadening for the same signal, the DCF fiber is also utilized to compensate for the SPM effect in the standard fiber. To this end, the signal power launched into the DCF fiber is controlled such that precise compensation for the SPM effect in the standard fiber can be achieved. Control of the launching power is needed because the mode field diameter of the DCF fiber is smaller than that of the standard single mode fiber so that the DCF fiber experiences the SPM effect at a lower power than the single mode fiber.

摘要翻译： 使用至少一个色散补偿光纤（DCF）来补偿由至少一个单模标准光纤电缆承载的外部调制信号的色散。 标准光纤中的自相位调制（SPM）效应的特征在于当1550nm波长信号被发射到光纤中时脉冲压缩和相关的脉冲失真。 由于DCF光纤中的SPM效应的特征在于相同信号的脉冲宽度，DCF光纤也用于补偿标准光纤中的SPM效应。 为此，控制发射到DCF光纤的信号功率，从而可以实现标准光纤中SPM效应的精确补偿。 需要控制发射功率，因为​​DCF光纤的模场直径小于标准单模光纤的模场直径，使得DCF光纤以比单模光纤更低的功率体验SPM效应。

公开(公告)号：US20170077670A1

公开(公告)日：2017-03-16

申请号：US15361629

申请日：2016-11-28

申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.

发明人： Yoshinori YAMAMOTO ,  Masaaki HIRANO

IPC分类号： H01S3/30 ,  H01S3/067 ,  H01S3/16 ,  G02B6/036 ,  G02B6/02

CPC分类号： H01S3/302 ,  G02B6/02014 ,  G02B6/02019 ,  G02B6/036 ,  G02B6/03627 ,  H01S3/06729 ,  H01S3/06754 ,  H01S3/06758 ,  H01S3/1608 ,  H04B10/2543 ,  H04B10/255 ,  H04B10/291 ,  H04B10/2916

摘要： The present invention relates to an optical fiber which can improve OSNR in an optical transmission system in which Raman amplification and an EDFA are combined. With respect to the optical fiber, a predetermined conditional formula is satisfied by an effective area Aeff1450 [μm2] at a wavelength of 1450 nm, a transmission loss α1450 [/km] at a wavelength of 1450 nm, and a transmission loss α1550_dB [dB/km] at a wavelength of 1550 nm. Further, with respect to the optical fiber, another predetermined conditional formula is satisfied by an effective area Aeff1550 [μm2] at a wavelength of 1550 nm, and a transmission loss α1550 [/km] at a wavelength of 1550 nm.

摘要翻译： 本发明涉及一种能够提高组合拉曼放大和EDFA的光传输系统中的OSNR的光纤。 对于光纤，通过波长1450nm的有效面积Aeff1450 [μm2]，波长1450nm的传输损耗α1450[/ km]，传输损耗α1550_dB[dB]来满足规定的条件式 / km]，波长1550nm。 此外，对于光纤，通过在1550nm的波长下的有效面积Aeff1550 [μm2]和在1550nm的波长的传输损耗α1550[/ km]来满足另一条件的条件式。

公开(公告)号：US20150222369A1

公开(公告)日：2015-08-06

申请号：US14415028

申请日：2012-07-19

申请人： Bengt-Erik Olsson ,  Christina Larsson

发明人： Bengt-Erik Olsson ,  Christina Larsson

IPC分类号： H04B10/61 ,  H04J14/02 ,  H04L5/14 ,  H04J14/06

CPC分类号： H04B10/6166 ,  H04B10/2531 ,  H04B10/255 ,  H04B10/2557 ,  H04B10/6163 ,  H04B10/64 ,  H04J14/0202 ,  H04J14/06 ,  H04L5/14

摘要： The invention relates to an optical spectrum inverter, configured for counteracting phase distortion effects in an optical channel over a predefined frequency range, to an inverter node, configured for duplex operation in at least two wavelength channels, and to a method for counteracting phase distortion effects in an optical channel. The optical spectrum inverter comprises an optical receiver comprising a polarization diversity unit configured for polarization resolved detection, wherein the optical receiver is configured for receiving an optical input signal comprising a first wavelength span and for converting the optical input signal to an electrical signal, and an optical modulator connectable to the optical receiver and configured for modulating the electrical signal onto an optical signal, wherein the optical modulator comprises an optical filter which is configured for selecting a second wavelength span of the optical signal corresponding to an optical output side band of an inverted spectrum of the optical channel such that phase distortion effects are counteracted at least partly over the predefined frequency range. In this way, an optical spectrum inverter is provided which is simple and cost-effective to realize and allows higher optical power levels in conjunction with a higher capacity per optical channel and is also adapted for longer transmission distances.

摘要翻译： 本发明涉及一种被配置为将预定频率范围内的光信道中的相位失真效应抵消到被配置为在至少两个波长信道中进行双工操作的逆变器节点的光谱逆变器以及用于抵消相位失真效应的方法 在光通道中。 所述光学频谱逆变器包括光接收器，该光接收器包括被配置用于偏振分辨检测的偏振分集单元，其中所述光接收器被配置为接收包括第一波长跨度的光输入信号并将所述光输入信号转换成电信号， 光调制器，其可连接到光接收器并且被配置用于将电信号调制到光信号上，其中所述光调制器包括滤光器，所述滤光器被配置为选择对应于反转的光输出侧带的所述光信号的第二波长跨度 光通道的频谱，使得相位失真效应至少部分地超过预定义的频率范围。 以这种方式，提供了一种光谱逆变器，其实现并且允许更高的光功率水平与每个光通道的更高容量相结合，并且还适合于更长的传输距离。

公开(公告)号：US08204377B2

公开(公告)日：2012-06-19

申请号：US12288794

申请日：2008-10-23

申请人： Xiang Liu ,  Robert William Tkach

发明人： Xiang Liu ,  Robert William Tkach

IPC分类号： H04J14/06 ,  H04B10/00

CPC分类号： H04J14/06 ,  H04B10/255

摘要： System, apparatus and method of optical communication are provided for performing digital compensation of the self-phase modulation (SPM) effect experienced by a polarization-division multiplexed (PDM) orthogonal frequency-division multiplexed (OFDM) signal in fiber transmission by compensating a complex digital waveform representing one orthogonal polarization component of the optical PDM-OFDM signal based on both digital waveforms representing two orthogonal polarization components of the PDM-OFDM signal. The compensation of the digital waveform may be further based on an anticipated mean total nonlinear phase shift experienced by the signal during fiber transmission due to SPM. The compensation may be divided into pre-compensation at the PDM-OFDM transmitter and post-compensation at the PDM-OFDM receiver. The fiber transmission link preferably includes a pre-dispersion compensation module, distributed inline dispersion compensation modules, and a post-dispersion compensation module arranged in a judiciously chosen manner.

摘要翻译： 提供光通信的系统，装置和方法，用于对光纤传输中的偏振分复用（PDM）正交频分复用（OFDM）信号所经历的自相位调制（SPM）效应进行数字补偿， 基于表示PDM-OFDM信号的两个正交偏振分量的两个数字波形，表示光学PDM-OFDM信号的一个正交偏振分量的数字波形。 数字波形的补偿可以进一步基于由于SPM而在光纤传输期间由信号所经历的预期平均总非线性相移。 该补偿可以分为PDM-OFDM发射机的预补偿和PDM-OFDM接收机的后补偿。 纤维传输链路优选地包括预分散补偿模块，分布式在线色散补偿模块和以明智选择的方式布置的后分散补偿模块。

公开(公告)号：US08068275B2

公开(公告)日：2011-11-29

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： H01S3/30 ,  H04B10/12

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。