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31 条记录 (耗时 0.012 秒)

    Pre-emphasis method in an optical communication system
    2.
    发明公开
    Pre-emphasis method in an optical communication system 审中-公开
    在einem optischen社区系统中的Präemphase-Verfahren

    公开(公告)号：EP1947786A2

    公开(公告)日：2008-07-23

    申请号：EP08006797.8

    申请日：2000-11-20

    申请人： Fujitsu Limited

    发明人： Sakamoto, Takeshi ,  Tomofuji, Hiroaki ,  Onaka, Hiroshi ,  Sekiya, Motoyoshi ,  Yamane, Kazuo ,  Terahara, Takafumi ,  Murakami, Makato

    IPC分类号： H04B10/08 ,  H04B10/17

    CPC分类号： H04B10/07953 ,  H04B10/0799

    摘要： The method of pre-emphasizing a plurality of optical signals in wavelength-division multiplexing optical signals inputted to an optical transmission line having a plurality of stations connected in-between which are provided with an optical amplifier, comprising the steps of:
    obtaining a predetermined physical quantity in a plurality of stations;
    respectively obtaining a partial optical signal-to-noise ratio of each of a plurality of optical signals in said plurality of stations according to said predetermined physical quantity;
    obtaining a sum of said partial optical signal-to-noise ratios of all of said optical signals amplified in each of said stations and an average value of said ratios;
    respectively obtaining a difference value of said each optical signal in said plurality of stations, of which the value is between said average value and said partial optical signal-noise ratio;
    obtaining a sum of said difference values in said stations wherein said optical signals are amplified, and
    regulating optical levels of said plurality of optical signals so that sums of said obtained difference values become all zero.

    摘要翻译： 输入到具有连接在其上的多个站的光传输线的波分复用光信号中的多个光信号的预加强方法包括以下步骤：获得预定的物理 数量在多个站; 分别根据所述预定物理量获得所述多个站中的多个光信号中的每一个的部分光信噪比; 获得在每个所述站中放大的所有所述光信号的所述部分光信噪比之和和所述比率的平均值之和; 分别获得所述多个站中的所述每个光信号的差值，其中值在所述平均值和所述部分光信号噪声比之间; 在所述站中获得所述差值的总和，其中所述光信号被放大，并且调节所述多个光信号的光电平，使得所获得的差值的和变为全零。

    Chromatic dispersion and nonlinearity compensation in optical fibre communication
    3.
    发明公开
    Chromatic dispersion and nonlinearity compensation in optical fibre communication 审中-公开
    faseroptischerÜbertragung的Nichtlinearitäts-und Farbenzerstreuungskompensierung

    公开(公告)号：EP0971493A3

    公开(公告)日：2002-09-11

    申请号：EP99113578.1

    申请日：1999-07-08

    申请人： FUJITSU LIMITED

    发明人： Tsuda, Takashi ,  Yamane, Kazuo ,  Kawasaki, Yumiko ,  Okano, Satoru

    IPC分类号： H04B10/18

    CPC分类号： H04B10/11 ,  H04B10/2525 ,  H04B2210/252 ,  H04B2210/254

    摘要： The present invention relates to a method for optical fiber communication, and a terminal device and system for use in carrying out the method, and an object of the present invention is to compensate for chromatic dispersion and nonlinearity. A device for outputting an optical signal having a variable optical power into an optical fiber transmission line is provided. The optical signal transmitted by the transmission line is converted into an electrical signal by an optical receiver. A parameter related to waveform degradation of the electrical signal is detected by a monitor unit. A control unit controls the optical power of the optical signal to be output from the device so that the waveform degradation is improved.

    摘要翻译： 光纤通信方法技术领域本发明涉及一种光纤通信方法，以及用于实施该方法的终端装置和系统，其目的在于补偿色散和非线性。 提供一种用于将具有可变光功率的光信号输出到光纤传输线中的装置。 由传输线传输的光信号由光接收机转换成电信号。 由监视器单元检测与电信号的波形劣化有关的参数。 控制单元控制要从设备输出的光信号的光功率，从而提高波形劣化。

    Optical transmission system using in-line amplifiers
    6.
    发明公开
    Optical transmission system using in-line amplifiers 失效
    OptichesÜbertragungssystemmit in-ReiheVerstärkern

    公开(公告)号：EP1635488A2

    公开(公告)日：2006-03-15

    申请号：EP05023970.6

    申请日：1997-09-24

    申请人： FUJITSU LIMITED

    发明人： Miyauchi, Akira ,  Yamane, Kazuo ,  Kawasaki, Yumiko ,  Okano, Satoru, Fujitsu Hokkaido Digital Tech. Ltd.

    IPC分类号： H04B10/18

    CPC分类号： H04B10/25137 ,  H01L31/14 ,  H04B10/2543 ,  H04B2210/252 ,  H04B2210/256

    摘要： In a system connecting a transmitter and a receiver using transmission paths and repeaters (in-line amplifiers), red chirping whose α parameter is positive is performed for an optical signal on a transmitting side. Each of the repeaters includes a dispersion-compensator for compensating the amount of dispersion on a preceding transmission path. The amount of dispersion compensation of the dispersion-compensator included in the transmitter is made constant. The dispersion-compensator included in the receiver is arranged in order to compensate the amount of dispersion on a preceding transmission path. A spread of a pulse width on a transmission path can be efficiently compensated by using the compensation capability of the dispersion-compensators and the red chirping on the transmitting side.

    摘要翻译： 在使用传输路径和中继器（串联放大器）连接发射机和接收机的系统中，对发射侧的光信号执行±参数为正的红色啁啾。 每个中继器包括用于补偿先前传输路径上的色散量的色散补偿器。 包含在发射机中的色散补偿器的色散补偿量是恒定的。 布置接收机中包含的色散补偿器，以便补偿前一传输路径上的色散量。 通过使用色散补偿器的补偿能力和发送侧的红色啁啾可以有效地补偿传输路径上的脉冲宽度的扩展。

    Wavelength multiplexing transmission apparatus and wavelength demultiplexing reception apparatus
    8.
    发明公开
    Wavelength multiplexing transmission apparatus and wavelength demultiplexing reception apparatus 失效
    为波分复用传输的装置，以及用于接收和多路分离的波长

    公开(公告)号：EP0910183A3

    公开(公告)日：2004-07-07

    申请号：EP98113402.6

    申请日：1998-07-17

    申请人： FUJITSU LIMITED

    发明人： Yamane, Kazuo ,  Tsuda, Takashi ,  Kawasaki, Yumiko ,  Okano, Satoru Fujitsu Hokkaido Digital Tech. Ltd.

    IPC分类号： H04B10/145 ,  H04J14/02

    CPC分类号： H04J14/02 ,  H04B10/506 ,  H04B10/564 ,  H04B10/572

    摘要： The invention provides a wavelength multiplexing transmission apparatus includes a plurality of optical signal outputting sections for outputting optical signals having different wavelengths from each other, and a wavelength multiplexing section for wavelength multiplexing the optical signals outputted from the optical signal outputting sections and sending out a resulting optical signal. Each of the optical signal outputting sections includes a transmission light source (1) driven by an electric signal for outputting an optical signal of a predetermined wavelength, and a wavelength filter (2) capable of passing therethrough and sending out only an optical signal of the predetermined wavelength to be outputted from the transmission light source (1) to prevent a wavelength drift of the optical signal outputted from the transmission light source (1). A variation of the wavelength of the transmission light source is detected, and the transmission light source is shutdown in order to prevent otherwise possible crosstalk with another channel and prevent a further influence of the same.

    摘要翻译： 本发明提供一种波长多路传输装置包括：光信号输出廷部分具有从海誓山盟不同波长的输出廷光信号的多个，并且用于波长复用的波长复用部的光信号从光信号输出亭部的输出并发送所得到的 光信号。 每个光学信号输出廷部分包括透射光源（1）通过在电信号驱动开始预定波长的光信号输出，和一个波长滤波器（2），其能够贯穿其中的孔，并且只在的光学信号发送出的 预定波长从发送光源的输出（1），以防止光信号的波长漂移从发送光源的输出（1）。 当检测到透射光源的波长的变型，并且传输光源是为了防止与另一信道，否则可能的串扰，防止相同的进一步影响关机。

    Optical transmission system and dispersion compensator
    9.
    发明公开
    Optical transmission system and dispersion compensator 失效
    一种光传输系统，和分散

    公开(公告)号：EP0862284A3

    公开(公告)日：2000-12-13

    申请号：EP97116075.9

    申请日：1997-09-16

    申请人： FUJITSU LIMITED

    发明人： Miyauchi, Akira ,  Yamane, Kazuo ,  Kawasaki, Yumiko ,  Okano, Satoru

    IPC分类号： H04B10/18

    CPC分类号： H04B10/25137 ,  H04B10/25133 ,  H04B2210/252

    摘要： In an optical transmission system comprising a transmitter, a receiver, and a transmission line that connects the transmitter and the receiver, a dispersion compensator is disposed in the receiver. The transmitter comprises an E/O (electro-optical signal converter) and a post-amplifier. An optical signal that has been RZ-coded is supplied to the E/O. The transmitter pre-chirps the optical signal. The pre-chirp is performed by red-chirp of which the value of the chirping parameter α is positive. When the pre-chirp is performed, the non-linear effect of the optical signal on the transmission line can be canceled. In addition, with the RZ coded signal, the inter-symbol interference can be alleviated. Thus, the total dispersion amount of the dispersion compensator can be suppressed. In addition, the power of the optical output can be increased.

    Optical transmission system using in-line amplifiers
    10.
    发明公开
    Optical transmission system using in-line amplifiers 失效
    OptischesÜbertragungssystemmit Inline-Verstärkern

    公开(公告)号：EP0862285A2

    公开(公告)日：1998-09-02

    申请号：EP97116632.7

    申请日：1997-09-24

    申请人： FUJITSU LIMITED

    发明人： Miyauchi, Akira ,  Yamane, Kazuo ,  Kawasaki, Yumiko ,  Okano, Satoru, c/o Fujitsu H. D. Techn. Ltd.

    IPC分类号： H04B10/18

    CPC分类号： H04B10/25137 ,  H01L31/14 ,  H04B10/2543 ,  H04B2210/252 ,  H04B2210/256

    摘要： In a system connecting a transmitter and a receiver using transmission paths and repeaters (in-line amplifiers), red chirping whose α parameter is positive is performed for an optical signal on a transmitting side. Each of the repeaters includes a dispersion-compensator for compensating the amount of dispersion on a preceding transmission path. The amount of dispersion compensation of the dispersion-compensator included in the transmitter is made constant. The dispersion-compensator included in the receiver is arranged in order to compensate the amount of dispersion on a preceding transmission path. A spread of a pulse width on a transmission path can be efficiently compensated by using the compensation capability of the dispersion-compensators and the red chirping on the transmitting side.

    摘要翻译： 在使用传输路径和中继器（在线放大器）连接发射机和接收机的系统中，对发射侧的光信号执行其alpha参数为正的红色啁啾。 每个中继器包括用于补偿先前传输路径上的色散量的色散补偿器。 包含在发射机中的色散补偿器的色散补偿量是恒定的。 布置接收机中包含的色散补偿器，以便补偿前一传输路径上的色散量。 通过使用色散补偿器的补偿能力和发送侧的红色啁啾可以有效地补偿传输路径上的脉冲宽度的扩展。