公开(公告)号：US20080013162A1

公开(公告)日：2008-01-17

申请号：US11822841

申请日：2007-07-10

申请人： Norifumi Shukunami ,  Tatsuya Tsuzuki

发明人： Norifumi Shukunami ,  Tatsuya Tsuzuki

IPC分类号： H01S3/00

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

摘要： In an optical amplifier of the present invention, 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 been 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： 在本发明的光放大器中，输入光被提供给连接到输出端口的光纤的一端，并且光的功率与从输出端口的一端输入到输出端口的相反方向 光纤，从而基于测量结果在光纤中获得受激布里渊散射（SBS）发生阈值。 然后，使用SBS发生阈值，获得输入光功率和光纤中的自相位调制（SPM）等的发生量的关系，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，能够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：US20070206954A1

公开(公告)日：2007-09-06

申请号：US11367141

申请日：2006-03-03

申请人： Daniel Fishman ,  Xiang Liu

发明人： Daniel Fishman ,  Xiang Liu

IPC分类号： H04B10/00

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：US07123841B2

公开(公告)日：2006-10-17

申请号：US10286827

申请日：2002-11-04

申请人： Hans Bissessur

发明人： Hans Bissessur

IPC分类号： H04B10/12

CPC分类号： H04B10/255

摘要： The transmission system is suitable for amplitude modulated controlled phase optical signals (S) having an optical phase in each low level pulse that precedes or follows a high level pulse. The system includes an optical link (L) and, to allow a high transmitting power, optical corrector means (FG) are provided for applying optical filtering to the signal R at the exit (B) of the link and/or at one point or a plurality of points of the link (L), to compensate widening of its spectrum that the controlled phase signal (S) may suffer because of phase self-modulation during its transmission. Application to long-haul optical transmission.

公开(公告)号：US06963675B2

公开(公告)日：2005-11-08

申请号：US10644873

申请日：2003-08-21

申请人： Shigeki Watanabe

发明人： Shigeki Watanabe

IPC分类号： G02F1/35 ,  G02B6/00 ,  H04B10/00 ,  H04B10/06 ,  H04J14/02

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

摘要： The device according to the present invention relates to phase conjugate conversion and wavelength conversion. This device includes a polarization beam splitter and a polarization maintaining fiber (PMF). The polarization beam splitter has first, second, and third ports. The first port is supplied with signal light including first and second polarization components respectively having first and second polarization planes orthogonal to each other, and with pump light. The first and second ports are coupled by the first polarization plane, and the first and third ports are coupled by the second polarization plane. The PMF has first and second ends, and has a polarization mode to be maintained between the first and second ends. The first end is optically connected to the second port so that the first polarization plane is adapted to the polarization mode, and the second end is optically connected to the third port so that the second polarization plane is adapted to the polarization mode. Converted light generated by four-wave mixing based on the signal light and the pump light in the PMF is output from the first port, so that the converted light can be taken out by an optical circulator.

摘要翻译： 根据本发明的装置涉及相位共轭转换和波长转换。 该装置包括偏振分束器和偏振保持光纤（PMF）。 偏振分束器具有第一，第二和第三端口。 第一端口被提供有包括分别具有彼此正交的第一和第二偏振面以及泵浦光的第一和第二偏振分量的信号光。 第一和第二端口通过第一偏振平面耦合，并且第一和第三端口由第二偏振平面耦合。 PMF具有第一端和第二端，并且在第一端和第二端之间具有保持偏振模式。 第一端光学地连接到第二端口，使得第一偏振面适应于偏振模式，并且第二端光学连接到第三端口，使得第二偏振面适应于偏振模式。 从第一端口输出基于信号光和PMF中的泵浦光的四波混合产生的转换光，从而可以通过光循环器取出转换后的光。

公开(公告)号：US20040125435A1

公开(公告)日：2004-07-01

申请号：US10331217

申请日：2002-12-30

发明人： Xiang Liu ,  Colin J. McKinstrie ,  Linn Frederick Mollenauer ,  Richart Elliott Slusher ,  Xing Wei ,  Chunhui Xu

IPC分类号： H01S003/00

CPC分类号： H04B10/255

摘要： A nonlinear phase-shift compensation method and apparatus is provided for improving system performance in optical transmission systems. The apparatus includes a phase-shift compensating device that provides a partial compensating phase shift to reduce the nonlinear phase noise resulting from self-phase modulation and amplified spontaneous emissions in an optical transmission system.

摘要翻译： 提供了一种用于提高光传输系统的系统性能的非线性相移补偿方法和装置。 该装置包括相移补偿装置，其提供部分补偿相移以减少由光传输系统中的自相位调制和放大的自发发射引起的非线性相位噪声。

公开(公告)号：US20030090770A1

公开(公告)日：2003-05-15

申请号：US10286827

申请日：2002-11-04

申请人： ALCATEL

发明人： Hans Bissessur

IPC分类号： H04B010/12 ,  H04B010/04

CPC分类号： H04B10/255

摘要： The transmission system is suitable for amplitude modulated controlled phase optical signals (S) having an optical phase in each low level pulse that precedes or follows a high level pulse. The system includes an optical link (L) and, to allow a high transmitting power, optical corrector means (FG) are provided for applying optical filtering to the signal R at the exit (B) of the link and/or at one point or a plurality of points of the link (L), to compensate widening of its spectrum that the controlled phase signal (S) may suffer because of phase self-modulation during its transmission. Application to long-haul optical transmission.

摘要翻译： 传输系统适用于在高电平脉冲之前或之后的每个低电平脉冲中具有光相位的调幅控制相位光信号（S）。 该系统包括光链路（L），并且为了允许高发射功率，提供光学校正装置（FG），用于对链路的出口（B）处的信号R和/或在一个点或 链路（L）的多个点，以补偿其受控相位信号（S）在其传输期间由于相位自调制而可能遭受的频谱的加宽。 适用于长途光传输。

公开(公告)号：US06341026B1

公开(公告)日：2002-01-22

申请号：US09660471

申请日：2000-09-12

申请人： Shigeki Watanabe

发明人： Shigeki Watanabe

IPC分类号： H04B1000

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.

摘要翻译： 一种使用光相位共轭补偿色散和光克尔效应的光通信系统。 光通信系统包括第一光纤，相位共轭器和第二光纤。 第一光纤透过光信号，并且是保偏光纤。 光信号是线偏振波。 相位共轭器从第一光纤接收光信号并产生相应的相位共轭光信号。 第二光纤从相位共轭器接收相位共轭光信号，并透过相位共轭光信号。 还提供了一种波分复用光通信系统，其使用光相位共轭来补偿色散和光克尔效应。

公开(公告)号：US20010022676A1

公开(公告)日：2001-09-20

申请号：US09797866

申请日：2001-03-05

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

IPC分类号： H04J014/02 ,  H04B010/18 ,  H04B010/14 ,  H04B010/00 ,  H04B010/16

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 null0 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。 当使用光纤复用和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lambd0的预定带宽的四波混频抑制保护带，并且信号光 要复用的多个信道的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：US5880876A

公开(公告)日：1999-03-09

申请号：US733185

申请日：1996-10-17

申请人： Nobuhiko Kikuchi ,  Shinya Sasaki

发明人： Nobuhiko Kikuchi ,  Shinya Sasaki

IPC分类号： H04B10/2507 ,  H04B10/07 ,  H04B10/2525 ,  H04B10/255 ,  H04B10/2563 ,  H04B10/54 ,  H04B10/58 ,  H04B10/12 ,  G02B6/10 ,  H04B10/18

CPC分类号： H04B10/2519 ,  H04B10/25253 ,  H04B10/255

摘要： An optical transmission system in which influences of worsening of the waveform by SPM are cancelled by setting an amount of compensation of a dispersion compensator at about 50% of a total amount of dispersion of an optical fiber transmission line so that received waveform is almost not varied, even if light intensity is varied. In the case where a plurality of dispersion compensators are used, the number of compensators is optimized by setting arrangement interval in the neighborhood of a receiving end at a small value. Further, in a transmission line, in which amounts of dispersion of optical fibers have positive and negative fluctuations, the smallest transmission distance of a transmission system is increased by effecting dispersion compensation so that an expected value of the total amount of dispersion of the transmission line is abnormal dispersion.

摘要翻译： 通过将色散补偿器的补偿量设置在光纤传输线的总色散的约50％以使接收波形几乎不变的光传输系统，其中SPM波形恶化的影响被消除 即使光强变化也是如此。 在使用多个色散补偿器的情况下，通过将接收端附近的布置间隔设定为较小的值来优化补偿器的数量。 此外，在其中光纤的色散量具有正和负波动的传输线中，通过进行色散补偿来增加传输系统的最小传输距离，使得传输线的总色散量的期望值 是异常分散。

公开(公告)号：US5760937A

公开(公告)日：1998-06-02

申请号：US784441

申请日：1997-01-16

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： An optical demultiplexer comprises a clock regenerating circuit for regenerating a clock signal for each optical signal channel from an optical multiplexed signal. An optical switch separates each optical signal channel from the optical multiplexed signal in accordance with the clock signal regenerated by the clock regenerating circuit. An identification information extraction circuit extracts identification information contained in each optical signal channel separated by the optical switch. A control circuit changes output destinations so that each optical signal channel is output to a designated destination in accordance with the identification information extracted by the identification information extraction circuit. The identification information is appended as identification data to a data signal represented by the optical signal, and the identification information extraction circuit extracts the identification data contained in the data signal reconstructed from each optical signal channel. A signal switching circuit is provided between outputs of the optical switch and output destinations, wherein the control circuit changes output destinations by changing connection relationships in the signal switching circuit between the outputs of the optical switch and the output destinations, for example, by changing the phase of the clock signal supplied to the optical switch.

摘要翻译： 光解复用器包括时钟再生电路，用于从光复用信号再生每个光信号通道的时钟信号。 根据由时钟再生电路再生的时钟信号，光开关将光信号通道与光复用信号分开。 识别信息提取电路提取由光开关分离的每个光信号通道中包含的识别信息。 控制电路改变输出目的地，使得根据由识别信息提取电路提取的识别信息将每个光信号信道输出到指定的目的地。 识别信息作为识别数据附加到由光信号表示的数据信号，并且识别信息提取电路提取包含在从每个光信号信道重建的数据信号中的识别数据。 信号切换电路设置在光开关和输出目的地的输出之间，其中控制电路通过改变光开关输出与输出目的地之间的信号切换电路中的连接关系来改变输出目的地，例如通过改变 提供给光开关的时钟信号的相位。