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    Optical amplifier provided with control function of pumping light, and optical transmission system using the same
    3.
    发明公开
    Optical amplifier provided with control function of pumping light, and optical transmission system using the same 有权
    包含所述泵浦光，与光传输系统的控制功能的光放大器使用该放大器

    公开(公告)号：EP1460737A1

    公开(公告)日：2004-09-22

    申请号：EP04005961.0

    申请日：2004-03-12

    申请人： FUJITSU LIMITED

    发明人： Sugaya, Yasushi ,  Hayashi, Etsuko ,  Nishihara, Masato ,  Muro, Shinichirou

    IPC分类号： H01S3/30 ,  H04B10/17

    CPC分类号： G02B6/264 ,  H01S3/005 ,  H01S3/0078 ,  H01S3/06758 ,  H01S3/094003 ,  H01S3/094096 ,  H01S3/0941 ,  H01S3/1301 ,  H01S3/1305 ,  H01S3/1608 ,  H01S3/302 ,  H04B10/2916

    摘要： In an optical transmission system according to one aspect of the present invention, for transmitting a WDM light from a transmission station to a reception station, utilizing a Raman amplifier, the Raman amplifier comprises: an optical amplification medium; a pumping light source generating a plurality of pumping lights having wavelengths different from each other; an optical device introducing the plurality of pumping lights to the optical amplification medium; and control means for controlling the pumping light source, the transmission station sends out a plurality of reference lights having wavelengths at which respective Raman gain obtained by the plurality of pumping lights reach peaks or wavelengths close to the above wavelengths, and the control means controls the plurality of pumping lights based on the optical powers of the plurality of reference lights. Thus, it becomes possible to accurately manage the optical power balance of the WDM light and the optical power of the entire WDM light.

    摘要翻译： 在一个光传输系统gemäß在本发明的一个方面，用于从传输站发送WDM光到一个接收站，利用拉曼放大器，所述拉曼放大器包括：光放大介质; 一个泵浦光源产生泵浦具有从海誓山盟不同波长的光的多元性; 到光学器件引入泵送灯到光放大介质的多元性; 和控制装置，用于控制所述激励光源，发送站发出的具有在哪个respectivement拉曼增益的波长通过的激发光所获得的多个到达峰值或波长接近上述波长参考光的多个，并且所述控制装置控制所述 基于参考光的多个的光功率的激发光的多个。 因此，变得能够准确地设定管理WDM光的光功率平衡和整个WDM光的光功率。

    Control apparatus and method for optical transmission apparatus
    4.
    发明公开
    Control apparatus and method for optical transmission apparatus 有权
    Vorrichtung und Verfahren zur Kontrolle von optischenÜbertragungsgeräten

    公开(公告)号：EP2180612A1

    公开(公告)日：2010-04-28

    申请号：EP10151770.4

    申请日：2006-03-01

    申请人： FUJITSU LIMITED

    发明人： Nishihara, Masato ,  Onaka, Miki ,  Hayashi, Etsuko ,  Muro, Shinichirou

    IPC分类号： H04B10/17 ,  H01S3/131

    CPC分类号： H04B10/2942 ,  H01S3/06754 ,  H01S3/10015 ,  H01S3/10069 ,  H01S3/1301 ,  H01S3/302

    摘要： A control apparatus comprises a light monitoring unit (10) for dividing a signal wavelength band into at least a band (41, 43) in which output light power of an optical amplifier (1) tends to decrease at an decrease in the number of signal wavelengths and a band (42) including a gain deviation band, and for monitoring inputted light power for the individual divided bands (41, 42, 43), calculation unit (21) for obtaining the number of signal wavelengths in the individual divided bands (41, 42, 43) based on a monitor result, and a target gain correction unit (22) for correcting a target gain based on a result of the calculation. This suppresses a transient variation of signal light levels due to SHB or SRS at a high speed with a simple configuration without deteriorating noise characteristic, thus enabling optical amplifiers to be further disposed in a multi-stage fashion, which can lengthen the transmission distance of a transmission system including an optical add/drop unit.

    摘要翻译： 控制装置包括：光监视单元（10），用于将信号波段划分成至少一个波段（41,43），其中光放大器（1）的输出光功率在信号数量的减少时趋于减小 波长和包括增益偏差带的频带（42），并且用于监视各个分割频带（41,42,43）的输入光功率，用于获得各个分割频带中的信号波长数量的计算单元（21） 41,42,43），以及用于基于计算结果来校正目标增益的目标增益校正单元（22）。 这样可以通过简单的配置，以高速度抑制由于SHB或SRS引起的信号光电平的瞬态变化而不会使噪声特性恶化，从而能够以多级方式进一步布置光放大器，这可以延长传输距离 传输系统，包括光学分插单元。

    Control apparatus and method for optical transmission apparatus
    5.
    发明公开
    Control apparatus and method for optical transmission apparatus 有权
    装置和方法用于光传输设备的控制

    公开(公告)号：EP1703602A3

    公开(公告)日：2009-09-16

    申请号：EP06004111.8

    申请日：2006-03-01

    申请人： FUJITSU LIMITED

    发明人： Nishihara, Masato ,  Onaka, Miki ,  Hayashi, Etsuko ,  Muro, Shinichirou

    IPC分类号： H04B10/17 ,  H01S3/131

    CPC分类号： H04B10/2942 ,  H01S3/06754 ,  H01S3/10015 ,  H01S3/10069 ,  H01S3/1301 ,  H01S3/302

    摘要： A control apparatus comprises a light monitoring unit (10) for dividing a signal wavelength band into at least a band (41, 43) in which output light power of an optical amplifier (1) tends to decrease at an decrease in the number of signal wavelengths and a band (42) including a gain deviation band, and for monitoring inputted light power for the individual divided bands (41,42,43), calculation unit (21) for obtaining the number of signal wavelengths in the individual dividedbands (41, 42, 43) basedon amonitor result, and a target gain correction unit (22) for correcting a target gain based on a result of the calculation. This suppresses a transient variation of signal light level due to SHB or SRS at a high speed with a simple configuration without deteriorating noise characteristic, thus enabling optical amplifiers to be further disposed in a multi-stage fashion, which can lengthen the transmission distance of a transmission system including an optical add/drop unit.

    Multi-path interference light measuring method and apparatus
    6.
    发明公开
    Multi-path interference light measuring method and apparatus 有权
    Methode undGerätzur Messung der Multipath - Lichtinterferenzen

    公开(公告)号：EP1351046A2

    公开(公告)日：2003-10-08

    申请号：EP03001356.9

    申请日：2003-01-24

    申请人： FUJITSU LIMITED

    发明人： Muro, Shinichirou ,  Sugaya, Yasushi

    IPC分类号： G01M11/00

    CPC分类号： H04B10/508 ,  H04B10/503

    摘要： Power of multi-path interference light is measured by setting the cycle of pulse modulation for a light source in correspondence with the length of an optical medium of a target(13) to be measured, by inputting pulse light after being modulated to the target(13) to be measured, by modulating (14) the pulse signal light output from the target (13) to be measured with the use of a pulse signal for modulation having the same cycle as the set cycle, and by observing the wavelength dependency of the power of the light after being modulated. In this way, a modulation condition is set according to a condition of a target(13) to be measured when multi-path interference light caused by double Rayleigh scattering light or reflection at the end of a connector is measured with a pulse-OSA method, so that measurement accuracy is improved.

    摘要翻译： 多径干涉光的功率是通过对被测定目标（13）的光学介质的长度对应于光源的脉冲调制周期，通过将调制后的脉冲光输入到目标（ 13）通过利用与设定周期相同的周期的调制用脉冲信号调制（14）从被测定对象物（13）输出的脉冲信号光，并且通过观察波长依赖性 光调制后的光功率。 以这种方式，根据由双重瑞利散射光引起的多径干涉光或连接器端部的反射的多径干涉光以脉冲OSA方法测量时，根据要测量的目标（13）的条件设定调制条件 ，从而提高测量精度。

    Method and device for optical amplification
    9.
    发明公开
    Method and device for optical amplification 有权
    Vorrichtung und Verfahren zur optischenVerstärkung

    公开(公告)号：EP1298764A2

    公开(公告)日：2003-04-02

    申请号：EP02006511.6

    申请日：2002-03-18

    申请人： FUJITSU LIMITED

    发明人： Muro, Shinichirou ,  Hayashi, Etsuko ,  Sugaya, Yasushi

    IPC分类号： H01S3/131 ,  H01S3/30 ,  H01S3/067

    CPC分类号： H01S3/302 ,  H01S3/06754 ,  H01S3/1301 ,  H01S3/1305

    摘要： The present invention relates to a device for optical amplification, and a primary object of the present invention is to provide a method and device for optical amplification which can maintain the wavelength characteristic of gain constant and can obtain a wide input dynamic range. The device according to the present invention includes a first optical amplifying unit having a Raman amplifying medium (1) and a first pump source (3) for pumping the Raman amplifying medium, and a second optical amplifying unit (7) optically connected to a rear stage of the first optical amplifying unit. The second optical amplifying unit has an optical amplifying medium and second pump sources (5,8) for pumping the optical amplifying medium. The present invention is characterized by a control unit for controlling the gain of the first optical amplifying unit so that variations in output power of the first optical amplifying unit due to variations in input power of the first optical amplifying unit are canceled.

    摘要翻译： 本发明涉及一种用于光放大的装置，本发明的主要目的是提供一种用于光放大的方法和装置，其可以保持增益的波长特性恒定并能获得宽的输入动态范围。 根据本发明的装置包括具有拉曼放大介质（1）和用于泵浦拉曼放大介质的第一泵浦源（3）的第一光放大单元和光学连接到后面的第二光放大单元（7） 第一光放大单元的阶段。 第二光放大单元具有用于泵浦光放大介质的光放大介质和第二泵源（5,8）。 本发明的特征在于控制单元，用于控制第一光放大单元的增益，从而消除由于第一光放大单元的输入功率变化引起的第一光放大单元的输出功率的变化。