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公开(公告)号：US20050219682A1
公开(公告)日：2005-10-06
申请号：US10945272
申请日：2004-09-21
IPC分类号： G02F1/35 , G02F1/365 , H01S3/00 , H01S3/067 , H01S3/10 , H01S3/13 , H01S3/16 , H01S3/30 , H04B10/07 , H04B10/29 , H04B10/294 , H04J14/00 , H04J14/02
CPC分类号： H01S3/06758 , H01S3/005 , H01S3/10007 , H01S3/10015 , H01S3/1305 , H01S3/1608 , H01S2301/04 , H04B10/2941 , H04B2210/003
摘要： The present invention relates to an optical amplifier and, in particular, it relates to multistage optical amplification having a feature for compensating for the tilt that is generated when a signal having a plurality of optical wavelengths and the like according to a wavelength division multiplexing (WDM) method is amplified in a wide bandwidth. The multistage optical amplifier comprises: a plurality of optical amplifiers that are connected in a multistage manner; and a common control section for commonly controlling pumping light powers of said plurality of optical amplifiers, wherein said common control section includes: tilt detection means for detecting amounts of tilt of each of said plurality of optical amplifiers; and tilt cancellation means for controlling the pumping light powers of said plurality of optical amplifiers so that the amounts of tilt of each of the optical amplifiers detected by said tilt detection means cancel each other.
摘要翻译： 光放大器技术领域本发明涉及一种光放大器，特别涉及具有补偿根据波分多路复用（WDM）具有多个光波长等的信号时产生的倾斜的特征的多级光放大 ）方法在宽带宽中被放大。 多级光放大器包括：以多级方式连接的多个光放大器; 以及用于共同控制所述多个光放大器的泵浦光功率的公共控制部分，其中所述公共控制部分包括：倾斜检测装置，用于检测所述多个光放大器中的每一个的倾斜量; 以及用于控制所述多个光放大器的泵浦光功率的倾斜消除装置，使得由所述倾斜检测装置检测的每个光放大器的倾斜量相互抵消。
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32.发明授权公开(公告)号：US06930824B1
公开(公告)日：2005-08-16
申请号：US09080909
申请日：1998-05-19
CPC分类号： H04J14/0224 , H04B10/25133 , H04B10/2525 , H04B10/25253 , H04B10/255 , H04B10/2563 , 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 λ0 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。 当使用光纤复用并传输具有不同波长的多个信道的光信号时，包括预定带宽的四波混频抑制保护带包括零色散波长λ<0> 设置光纤，并且多路复用的多个信道的信号光波被布置在保护带外部的短波长侧和较长波长侧中的一个上。
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33.发明授权公开(公告)号：US06243176B1
公开(公告)日：2001-06-05
申请号：US08917292
申请日：1997-08-25
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;&thgr; 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。
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34.发明授权
公开(公告)号：US5754322A
公开(公告)日：1998-05-19
申请号：US781511
申请日：1997-01-08
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.
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35.发明授权
公开(公告)号：US5696614A
公开(公告)日：1997-12-09
申请号：US781137
申请日：1997-01-09
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。
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公开(公告)号：US08810782B2
公开(公告)日：2014-08-19
申请号：US13207796
申请日：2011-08-11
申请人： Motoyoshi Sekiya , Yusaku Yamamoto
发明人： Motoyoshi Sekiya , Yusaku Yamamoto
IPC分类号： G01N21/00 , H04B10/077
摘要： A dispersion measurement apparatus includes: a pulse generator to output optical pulses including an optical pulse with a first wavelength and an optical pulse with a second wavelength to an optical transmission path, the second wavelength being different from the first wavelength; a reception pulse analyzer including an optical receiver that receives the optical pulses output by the pulse generator, and an analyzer that performs a wavelet transform on an electrical pulse output through the reception performed by the optical receiver; and a calculator to detect, based on a result of the wavelet transform, a time difference between the optical pulse with the first wavelength and the optical pulse with the second wavelength, and to determine dispersion in the optical transmission path.
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公开(公告)号：US08699884B2
公开(公告)日：2014-04-15
申请号：US13137933
申请日：2011-09-21
申请人： Takashi Toyomaki , Motoyoshi Sekiya
发明人： Takashi Toyomaki , Motoyoshi Sekiya
IPC分类号： H04J14/02
CPC分类号： H04B10/0773 , H04B2210/074 , H04J14/0212 , H04J14/0227 , H04J14/0258 , H04J14/0276
摘要： An optical transmission system includes a plurality of optical nodes that transmits wavelength multiplexing light including a plurality of signal light components having different wavelengths, wherein each of the optical nodes includes superimposed signal light generation circuit which superimposes a low frequency signal having a common frequency on a corresponding signal light component included in the wavelength multiplexing light; low frequency signal extraction circuit which extracts a low frequency signal having a frequency of a given range from a corresponding signal light component; and pass-through node number measurement circuit which measures, for each of the signal light components, a pass-through node number based on the frequency of the low frequency signal extracted by the low frequency signal extraction circuit, the pass-through node number being the number of optical nodes through which the signal light component has passed before being transmitted to a specific optical node.
摘要翻译： 一种光传输系统包括多个发送包括具有不同波长的多个信号光分量的波分复用光的光节点，其中每个光节点包括叠加信号光生成电路，该电路将具有共同频率的低频信号叠加在 包括在波长复用光中的相应信号光分量; 低频信号提取电路，从对应的信号光分量中提取具有给定范围的频率的低频信号; 以及直通节点号测量电路，对于每个信号光分量，测量基于由低频信号提取电路提取的低频信号的频率的直通节点数，直通节点数为 信号光分量在被传输到特定光节点之前经过的光节点的数量。
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公开(公告)号：US07742702B2
公开(公告)日：2010-06-22
申请号：US11360386
申请日：2006-02-24
申请人： Motoyoshi Sekiya
发明人： Motoyoshi Sekiya
IPC分类号： H04B10/00
CPC分类号： H04B10/25137 , H04B10/505
摘要： A chirp switching circuit comprises a Mach-Zehnder modulator having a Y-branched part for branching an incoming optical signal into first and second optical signals and an X-branched part merging the first and second optical signals with each other, the Mach-Zehnder modulator causing phase modulation in the first and second optical signals by a modulation signal, and a directional coupling optical switch that switches first and second optical output signals output from the X-branched part of the Mach-Zehnder modulator by merging the first and second output optical signals in response to a chirp switching control signal.
摘要翻译： 啁啾开关电路包括具有Y分支部分的马赫 - 曾德调制器，用于将入射光信号分支为第一和第二光信号，以及将第一和第二光信号彼此合并的X分支部分，马赫 - 曾德调制器 通过调制信号引起第一和第二光信号中的相位调制，以及定向耦合光开关，其通过合并第一和第二输出光学器件来切换从马赫 - 曾德调制器的X分支部分输出的第一和第二光输出信号 响应啁啾开关控制信号的信号。
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公开(公告)号：US07474854B2
公开(公告)日：2009-01-06
申请号：US10731266
申请日：2003-12-09
申请人： Motoyoshi Sekiya , Ryosuke Goto
发明人： Motoyoshi Sekiya , Ryosuke Goto
IPC分类号： H04J14/02
CPC分类号： H04B10/25073
摘要： In an optical transmission system which can keep a flat pass characteristic within an optical signal modulation band, a spectrum of a dropped optical signal within a modulation band per channel is monitored, and non-flatness for the optical signal is compensated by detecting the non-flatness of a pass characteristic of a transmission line from the spectrum.
摘要翻译： 在能够在光信号调制带内保持平坦通过特性的光传输系统中，监视每个通道的调制频带内的丢弃光信号的频谱，通过检测非信道光信号来补偿光信号的非平坦度， 来自频谱的传输线的通过特性的平坦度。
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40.发明授权公开(公告)号：US07460789B2
公开(公告)日：2008-12-02
申请号：US11019420
申请日：2004-12-23
申请人： Kaori Odate , Motoyoshi Sekiya , Takuya Miyashita
发明人： Kaori Odate , Motoyoshi Sekiya , Takuya Miyashita
CPC分类号： H04B10/564 , H04B10/255
摘要： A control method, which is applicable to a variety of network configurations, controls an optical transmission system to determine optimum optical input power to a transmission path for increased optical transmission quality. The optical transmission system has terminal stations, repeaters, dispersion compensation modules, and a dispersion compensation controller. The terminal stations transmit and receive an optical signal through an optical fiber transmission path. The repeaters are disposed in the optical fiber transmission path for amplifying the optical signal. The dispersion compensation modules are disposed in the terminal stations and the repeaters for compensating for dispersion of the optical signal. The dispersion compensation controller determines a target value for a nonlinear phase shift, which is an indication of a self-phase modulation caused by a transmission medium of the optical fiber transmission path, to have a maximum residual dispersion tolerance, and adjusts at least one of the input powers applied to transmission paths connected to the terminal stations or the repeaters and the input powers applied to the dispersion compensation modules to equalize the nonlinear phase shifts of paths in the optical transmission system to the target value.
摘要翻译： 适用于各种网络配置的控制方法控制光传输系统以确定用于提高光传输质量的传输路径的最佳光输入功率。 光传输系统具有终端站，中继器，色散补偿模块和色散补偿控制器。 终端站通过光纤传输路径发送和接收光信号。 中继器设置在用于放大光信号的光纤传输路径中。 色散补偿模块设置在终端站和中继器中，用于补偿光信号的色散。 色散补偿控制器确定作为由光纤传输路径的传输介质引起的自相位调制的指示的非线性相移的目标值具有最大残余色散容限，并且调整至少一个 施加到连接到终端站或中继器的传输路径的输入功率和施加到色散补偿模块的输入功率，以将光传输系统中路径的非线性相移均衡到目标值。
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