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21 条记录 (耗时 0.015 秒)

    Method and apparatus for measuring optical signal-to-noise ratio, and pre-emphasis method, in an optical communication system
    15.
    发明公开
    Method and apparatus for measuring optical signal-to-noise ratio, and pre-emphasis method, in an optical communication system 审中-公开
    用于测量的光传输系统的光信噪比，和方法，用于预失真的方法和装置

    公开(公告)号：EP1130803A2

    公开(公告)日：2001-09-05

    申请号：EP00124366.6

    申请日：2000-11-20

    申请人： FUJITSU LIMITED

    发明人： Sakamoto, Takeshi ,  Tomofuji, Hiroaki ,  Onaka, Hiroshi ,  Sekiya, Motoyoshi ,  Murakami, Makoto, Fujitsu Hokkaido Dig. Tech. Ltd. ,  Yamane Kazuo, c/o Fujitsu Ltd. ,  Terahara, Takafumi, Fujitsu Ltd.1-1Kamikodanaka

    IPC分类号： H04B10/08

    CPC分类号： H04B10/07953 ,  H04B10/0799

    摘要： In a method of measuring an optical signal-to-noise ratio according to the present invention, a partial optical signal-to-noise ratio is defined, the partial optical signal-to-noise ratio is calculated from a predetermined physical quantity, the sum of inverse numbers of the partial optical signal-to-noise ratios is calculated, and further an inverse number of the sum is calculated to acquire an optical signal-to-noise ratio. The present invention makes it possible to measure optical SNR without directly measuring ASE in the optical signal. The present invention provides a measuring apparatus, a measuring circuit, a pre-emphasis method, an optical communication system, and a controlling apparatus each utilizing this method.

    摘要翻译： 在光学信噪比雅丁的测量在本发明的方法，部分的光信噪比的定义，部分光信噪比从预定的物理量，所述总和计算 部分光信号 - 噪声比的倒数的计算，进一步对总和的倒数为获取关于光学信噪比计算。 本发明使得有可能测量光SNR而不在光信号直接测量ASE。 本发明提供了一个测量装置，一个测量电路，一个预加重方法的光通信系统，以及控制设备中的每个利用此方法。

    Optical transmission system, optical multiplexing transmission system, and related peripheral techniques
    17.
    发明公开
    Optical transmission system, optical multiplexing transmission system, and related peripheral techniques 失效
    光传输系统，光复用传输系统和相关的外围技术

    公开(公告)号：EP1536259A2

    公开(公告)日：2005-06-01

    申请号：EP05003245.7

    申请日：1995-08-02

    申请人： FUJITSU LIMITED

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

    IPC分类号： G02B6/34

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

    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 (53), and control of signal light wavelength in a tunable light source (44), 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： 本发明提供了一种用于优化传输条件以实现大容量传输的技术，并且还提供了用于实现实现大容量传输的光复用的实际实现的外围技术。 在传输特性测量部分（53）中测量传输特性，并且控制可调光源（44）中的信号光波长，控制预啁啾量，控制色散补偿量和/或控制 执行光功率以实现最佳传输特性。 波长色散是由色散补偿器故意引入的，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，时钟相位稳定等外围技术，用于实现光复用。

    Optical transmission system, optical multiplexing transmission system, and related peripheral techniques
    18.
    发明公开
    Optical transmission system, optical multiplexing transmission system, and related peripheral techniques 失效
    OptischesÜbertragungssystem，optischesMultiplexingübertragungssystemunddazugehörigeVerfahren

    公开(公告)号：EP1536258A2

    公开(公告)日：2005-06-01

    申请号：EP05003242.4

    申请日：1995-08-02

    申请人： FUJITSU LIMITED

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

    IPC分类号： G02B6/34

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

    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 (53), and control of signal light wavelength in a tunable light source. (44), 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： 本发明提供一种用于优化传输条件以实现大容量传输的技术，并且还提供了实现实现大容量传输可能的光复用的外围技术。 传输特性在传输特性测量部分（53）中被测量，并且在可调光源中控制信号光波长。 （44），进行预充电量的控制，色散补偿量的控制和/或光功率的控制，以实现最佳的传输特性。 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现光学多路复用。

    Optical amplifying apparatus, wide-band optical amplifying apparatus, and optical communication system
    19.
    发明公开
    Optical amplifying apparatus, wide-band optical amplifying apparatus, and optical communication system 审中-公开
    光放大装置，宽带光放大装置和光通信系统

    公开(公告)号：EP1480360A2

    公开(公告)日：2004-11-24

    申请号：EP04020420.8

    申请日：2000-09-26

    申请人： FUJITSU LIMITED

    发明人： Tomofuji, Hiroaki ,  Sekiya, Motoyoshi ,  Sakamoto, Takeshi ,  Murakami, Makoto ,  Oshima, Chihiro ,  Onoda, Yoshihito

    IPC分类号： H04B10/17 ,  H01S3/067

    CPC分类号： H04B10/296 ,  H01S3/067 ,  H01S3/06758 ,  H04B10/2931 ,  H04B2210/258

    摘要： An optical amplifying apparatus for widening the input dynamic range and lowering noises. The optical amplifying apparatus comprises a first optical amplifier, an optical attenuator, a second optical amplifier and a controller. The first optical amplifier changes the target value of output light when the variance amount of input light reaches a predetermined value. The controller changes the attenuation amount of attenuator in accordance with a difference between the target value and the changed target value of the output light level of the first optical amplifier, when the target value of the output light level of the first optical amplifier is changed.

    摘要翻译： 一种用于扩大输入动态范围并降低噪声的光学放大装置。 该光放大装置包括第一光放大器，光衰减器，第二光放大器和控制器。 当输入光的变化量达到预定值时，第一光放大器改变输出光的目标值。 当第一光放大器的输出光电平的目标值改变时，控制器根据目标值与第一光放大器的输出光电平的改变后的目标值之间的差来改变衰减器的衰减量。

    An optical transmission apparatus and an optical wavelength multiplex network therewith
    20.
    发明公开
    An optical transmission apparatus and an optical wavelength multiplex network therewith 审中-公开
    一种用于在顺序光传输和光波分复用网络

    公开(公告)号：EP1443695A2

    公开(公告)日：2004-08-04

    申请号：EP04001662.8

    申请日：2004-01-27

    申请人： FUJITSU LIMITED

    发明人： Miyata, Hideyuki ,  Tomofuji, Hiroaki ,  Onaka, Hiroshi ,  Takeno, Minoru

    IPC分类号： H04J14/02

    CPC分类号： H04J14/0294 ,  H04J14/0204 ,  H04J14/0205 ,  H04J14/0206 ,  H04J14/021 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/022 ,  H04J14/0227 ,  H04J14/0241 ,  H04J14/0283 ,  H04J14/0284

    摘要： A double-ring optical wavelength multiplex network is disclosed, which includes multiple optical transmission apparatuses that can reduce the unit cost of initially installing a small optical network while providing the flexibility to expand. For multiplexed optical signals arriving at a node, the optical transmission apparatus "drops" selected wavelengths for local delivery and "passes" others for continued transmission on the network. For optical signals originating ("added") at the node, the optical transmission apparatus wavelength multiplexes the "added" signals with the "passing" signals for transmission on the network. For "added" signals, the optical transmission apparatus blocks "passing" signals of the same wavelength.

    摘要翻译： 一种双环光波长复用网络是游离缺失盘，其包括多个光学发送装置确实可以减少首次安装的小型光学网络，同时提供灵活地扩展的单位成本。 对于到达一个节点多路复用光信号，该光传输装置“滴”选择用于局部递送和“通过”其他网络上继续传输波长。 用于在所述节点处的光信号源自（“添加”），光学传输设备波长与“通过”信号用于网络上的传输复用“添加”的信号。 对于“添加”信号时，光传输装置的块“通过”相同波长的信号。