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1. 发明专利

JP2015022086A マルチコア光ファイバ有权
标题翻译：多芯光纤
公开(公告)号：JP2015022086A
公开(公告)日：2015-02-02
申请号：JP2013149048
申请日：2013-07-18
申请人：日本電信電話株式会社 , Nippon Telegr & Teleph Corp
发明人： SAKAMOTO YASUSHI , MORI TAKAYOSHI , YAMAMOTO TAKASHI , WADA MASAKI , NAKAJIMA KAZUHIDE , YAMAMOTO FUMIHIKO
IPC分类号： G02B6/04 , G02B6/02
摘要：【課題】本発明は、2個以上のコアが配置された光ファイバにおいて、群遅延差の低減と空間利用効率の両立を図ることを目的とする。【解決手段】本発明は、2個以上のコアが配置された光ファイバであって、光ファイバ中を伝搬するモード間の群遅延差が?450ps/km以下、かつコア間のクロストークが−25dB以上となる様にコア間隔距離Dとモードフィールド半径Wの比D/Wを制御する。【選択図】図1
摘要翻译：要解决的问题：兼容地实现了具有两个或更多个核心的光纤中的组延迟差和空间利用效率的降低。解决方案：本发明是一种配置有两个或更多个核的光纤，其中，控制芯间隔距离D与模场半径W的D / W，使得在光纤中传播的模场之间的组延迟差成为等于或不高于±450ps / km，并且在核变得等于或不小于25db。

2. 发明专利

JP2015022083A マルチモード光ファイバおよび光ファイバ伝送システム有权
标题翻译：多模光纤和光纤传输系统
公开(公告)号：JP2015022083A
公开(公告)日：2015-02-02
申请号：JP2013148942
申请日：2013-07-17
申请人：日本電信電話株式会社 , Nippon Telegr & Teleph Corp
发明人： MORI TAKAYOSHI , SAKAMOTO YASUSHI , WADA MASAKI , YAMAMOTO TAKASHI
IPC分类号： G02B6/028 , G02B6/02 , G02B6/036 , H04B10/2507
摘要：【課題】伝搬モード間の群遅延差を低減できるとともに伝搬モード数を4より大きくすることができるマルチモード光ファイバ及び光ファイバ伝送システムを提供する。【解決手段】マルチモード光ファイバは、グレーデッド型プロファイルを有するコアと、コアの外側とその外側のクラッドとの間に低屈折率層を有しており、屈折率分布の各パラメータがa1=12.3〜12.6μm,a2=14.0〜14.4μm,a3=16.1〜19.0μm,&Dgr;1=0.81〜0.85%,&Dgr;2=−0.79〜−0.55%,α=1.89〜2.05,である。【選択図】図1
摘要翻译：要解决的问题：提供可以减少传播模式之间的组延迟差异的多模光纤和光纤传输系统，并且可以使传播模式的数量大于4.解决方案：多模光纤包括：具有分级资料; 以及设置在芯的外部和外部的包层之间的低折射率层。折射率分布的参数为a =12.3-12.6μm，a =14.0-14.4μm，a =16.1-19.0μm，Dgr = 0.81-0.85％，Dgr = -0.79〜-0.55％，α= 1.89 -2.05。

3. 发明专利

JP2014170850A Optical amplifier for multi-mode transmission 有权
标题翻译：用于多模传输的光放大器
公开(公告)号：JP2014170850A
公开(公告)日：2014-09-18
申请号：JP2013042229
申请日：2013-03-04
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： WADA MASAKI , SAKAMOTO YASUSHI , HANZAWA NOBUTOMO , YAMAMOTO TAKASHI , MORI TAKAYOSHI
IPC分类号： H01S3/10
摘要： PROBLEM TO BE SOLVED: To adjust the gain in each mode of signal light without using a space optics in entry and exit of signal light and exciting light to and from an optical fiber for amplification, in an optical amplifier for multimode transmission.SOLUTION: An optical amplifier for multimode transmission includes an optical fiber 14 for transmission, an optical fiber 11 for amplification, and an exciting light source 21. The optical amplifier further includes an optical coupler 12 for mode multiplexing that multiplexes the exciting light to signal light and converts the exciting light to an arbitrary mode, or a mode converter 34 that converts the exciting light before or after entering the optical fiber 14 for transmission to an arbitrary mode.
摘要翻译：要解决的问题：在用于多模传输的光放大器中，在信号光的每种模式中调节增益而不使用信号光进入和退出的空间光学器件以及来自用于放大的光纤的激发光的光学放大器。解决方案：用于多模传输的光放大器包括用于传输的光纤14，用于放大的光纤11和激发光源21.光放大器还包括用于模式复用的光耦合器12，其将激励光复用到信号光并将激发光到任意模式，或模式转换器34，其在进入光纤14之前或之后转换激发光以传输到任意模式。

4. 发明专利

JP2014086599A Optical fiber 有权
标题翻译：光纤
公开(公告)号：JP2014086599A
公开(公告)日：2014-05-12
申请号：JP2012235110
申请日：2012-10-24
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： WADA MASAKI , SAKAMOTO YASUSHI , MORI TAKAYOSHI , YAMAMOTO TAKASHI
IPC分类号： H01S3/067 , G02B6/00
摘要： PROBLEM TO BE SOLVED: To obtain an excitation mode of basic mode, and to ensure that the gain of signal light in higher-order mode is equal to or higher than the gain in basic mode.SOLUTION: In an optical fiber having a step refractive type index distribution mainly composed of silica glass and having a core and a cladding, when a concentration of a rare earth element in a range of radius a3 from the center of core is denoted by d1, and the concentration of a rare earth element in a range of radius a2 from the radius a3 of the core is denoted by d2, it is ensured that the gain in the higher-order mode of signal light propagating through the optical fiber is equal to or higher than the gain in the basic mode by selecting the value of d1/d2 suitable for the value of a2/a1.
摘要翻译：要解决的问题：获得基本模式的激励模式，并确保高阶模式下的信号光的增益等于或高于基本模式的增益。解决方案：在具有阶跃折射的光纤中类型指数分布主要由二氧化硅玻璃组成并具有芯和包层，当从芯的中心的半径a3的范围内的稀土元素的浓度由d1表示时，稀土元素的浓度由从芯的半径a3的半径a2的范围由d2表示，确保通过光纤传播的信号光的高阶模式中的增益等于或高于基本模式中的增益，通过选择 d1 / d2的值适用于a2 / a1的值。

5. 发明专利

JP2014017800A Radio communication system and radio communication method 有权
标题翻译：无线电通信系统和无线电通信方法
公开(公告)号：JP2014017800A
公开(公告)日：2014-01-30
申请号：JP2012228070
申请日：2012-10-15
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社 , Kyoto Univ , 国立大学法人京都大学
发明人： ISHIHARA KOICHI , KUDO RIICHI , MIZOGUCHI MASATO , YAMAMOTO TAKASHI , HANADA KOHEI
IPC分类号： H04W28/16 , H04W24/10 , H04W84/12
摘要： PROBLEM TO BE SOLVED: To enhance efficiency of radio communication in a radio communication system in which interference signals are generated by interference sources existing in the vicinity.SOLUTION: A radio communication system comprises a centralized control station and base station devices controlled by the centralized control station, which perform radio communication with terminal devices. The base station device collects pieces of communication quality information of other radio devices, and notifies the centralized control station of the collected pieces of communication quality information. The centralized control station determines communication parameters for each base station device on the basis of the pieces of communication quality information reported by the base station device, and notifies the base station device of the determined communication parameters. The base station device sets parameters to be used for radio communication with the terminal devices to the parameters transmitted from the centralized control station.
摘要翻译：要解决的问题：提高无线电通信系统中的无线电通信的效率，其中存在干扰源产生干扰信号。解决方案：无线电通信系统包括集中控制站和由集中控制控制的基站设备与终端设备进行无线电通信。基站装置收集其他无线装置的通信质量信息，向集中控制站通知所收集的通信质量信息。集中控制站根据基站装置报告的通信质量信息，确定各基站装置的通信参数，并通知基站装置所确定的通信参数。基站装置将用于与终端装置的无线通信的参数设定为从集中控制站发送的参数。

6. 发明专利

JP2013128198A Optical fiber system, optical fiber transmission system, and optical fiber transmission method 有权
标题翻译：光纤系统，光纤传输系统和光纤传输方法
公开(公告)号：JP2013128198A
公开(公告)日：2013-06-27
申请号：JP2011276753
申请日：2011-12-19
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： SAKAMOTO YASUSHI , YAMAMOTO TAKASHI , MORI TAKAYOSHI
IPC分类号： H04B10/25 , H04B10/2507
摘要： PROBLEM TO BE SOLVED: To compensate for a difference in group delay between modes in optical MIMO transmission, thereby making it easy to fabricate and analyze multimode optical fiber.SOLUTION: The present invention relates to a multimode optical fiber 3 having features in that there coexist pDMDF3-1 and 3-3 in which the inner and the outer cores have staircase refraction index distribution, the relative refraction index difference of the inner core is larger than that of the outer core, and a difference in group delay derived by subtracting a basic mode group delay from a higher order mode group delay is positive and nDMDF3-2 and 3-4 in which the inner and the outer cores have staircase refraction index distribution, the relative refraction index difference of the inner core is larger than that of the outer core, and a difference in group delay derived by subtracting the basic mode group delay from the higher order mode group delay is negative.
摘要翻译：要解决的问题：为了补偿光MIMO传输模式之间的组延迟差异，从而使制造和分析多模光纤变得容易。解决方案：本发明涉及一种多模光纤3，其特征在于，共存pDMDF3-1和3-3，其中内核和外核具有阶梯折射率分布，内部的相对折射率差内核大于外核，通过从高阶模组群延时减去基本模组延迟而导致的组延迟差为正，内核和外核的nDMDF3-2和3-4为楼层折射率分布，内核的相对折射率差异大于外核的相对折射率差，通过从高阶模组群延时减去基本模组群延迟导出的群延迟差为负。版权所有（C）2013，JPO＆INPIT

7. 发明专利

JP2013115503A Radio communication system 有权
标题翻译：无线电通信系统
公开(公告)号：JP2013115503A
公开(公告)日：2013-06-10
申请号：JP2011257896
申请日：2011-11-25
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社 , Kyoto Univ , 国立大学法人京都大学
发明人： KUDO RIICHI , ISHIHARA KOICHI , MURAKAMI TOMOKI , MIZOGUCHI MASATO , YAMAMOTO TAKASHI
IPC分类号： H04W72/08 , H04W16/04
摘要： PROBLEM TO BE SOLVED: To improve the efficiency of radio communication in a radio communication system in which there is another radio communication device using an overlapping frequency in the vicinity and an interference signal is generated.SOLUTION: A radio communication system comprises a central control station and a plurality of base station devices connected with the central control station. The base station device of the radio communication system performing radio communication in the environment in which an interference signal is received by the base station device estimates interference-related information which is information on the interference signal, notifies the central control station of the estimated interference-related information, and changes a channel used for radio communication with a terminal device to a channel of which the central control station gave notice. The central control station calculates through-put indicators of two or more channel candidates among channel candidates including a plurality of channels with different frequency bands for each base station device, determines a channel for the base station device on the basis of the calculated through-put indicators, and notifies the base station device of the determined channel.
摘要翻译：解决的问题：为了提高无线通信系统中的无线通信的效率，在无线通信系统中，存在使用附近的重叠频率的另一无线通信装置和产生干扰信号。解决方案：无线电通信系统包括中央控制站和与中央控制站连接的多个基站设备。在由基站装置接收到干扰信号的环境中进行无线通信的无线通信系统的基站装置估计作为干扰信号的信息的干扰相关信息，向中央控制站通知估计的干扰信号，将与终端装置的无线通信用的信道变更为中央控制站通知的信道。中央控制站在每个基站装置中计算包括具有不同频带的多个信道的信道候选之间计算两个或更多个信道候选的通配指示符，基于计算的通过量确定基站装置的信道指示符，并将确定的信道通知给基站装置。版权所有（C）2013，JPO＆INPIT

8. 发明专利

JP2010025725A Wavelength dispersion measuring device and method for measuring wavelength dispersion 有权
标题翻译：波长分散测量装置和测量波长分布的方法
公开(公告)号：JP2010025725A
公开(公告)日：2010-02-04
申请号：JP2008186856
申请日：2008-07-18
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： YAMAMOTO TAKASHI , KUROKAWA KENJI , FUKAI CHISATO , SAKAMOTO YASUSHI , KURASHIMA TOSHIO
IPC分类号： G01M11/02
摘要： PROBLEM TO BE SOLVED: To provide a wavelength dispersion measuring device capable of precisely measuring a wavelength dispersion without being affected by an α parameter, a modulation index and a loss in a measuring system of a modulator each being a cause that increases a measuring error. SOLUTION: After a phase modulation of an optional modulation index is applied to continuous light output from a light source 10 by a phase modulator 12, the light is incident on a dispersion medium 13. The phase modulator 12 is driven by means of a sine wave signal output from a frequency variable oscillator 11. Output light of the dispersion medium 13 is converted into an electric signal by a light receiver 14 and an alternate current component of the electric signal is observed by means of a spectrum analyzer 15. While phase modulation-intensity modulation conversion occurs in the dispersion medium 13, when a phase modulation frequency is sweeped, a time waveform of the output light of the dispersion medium 13 does not have an intensity modulation component, that is, there is a modulation frequency becoming continuous light. The wavelength dispersion of the dispersion medium is precisely and directly derived from the value of the modulation frequency. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够精确地测量波长色散而不受α参数，调制指数以及调制器的测量系统中的损耗的波长色散测量装置，它们都是增加一个原因测量误差。解决方案：在通过相位调制器12将可选调制指数的相位调制应用于从光源10输出的连续光后，光入射到分散介质13上。相位调制器12通过从频率可变振荡器11输出的正弦波信号。通过光接收器14将分散介质13的输出光转换为电信号，并通过频谱分析仪15观察电信号的交流分量。相位调制强度调制转换发生在色散介质13中，当相位调制频率被扫描时，分散介质13的输出光的时间波形不具有强度调制分量，即调制频率变为连续光线分散介质的波长色散由调制频率的值精确而直接得出。版权所有（C）2010，JPO＆INPIT

9. 发明专利

JP2009260715A Cross-point detection circuit of receiving optical signal and optical receiving apparatus using the same 有权
标题翻译：接收光信号的交叉点检测电路和使用该光信号的光接收装置
公开(公告)号：JP2009260715A
公开(公告)日：2009-11-05
申请号：JP2008107988
申请日：2008-04-17
申请人： Nippon Telegr & Teleph Corp , Ntt Electornics Corp , Nttエレクトロニクス株式会社 , 日本電信電話株式会社
发明人： YONENAGA KAZUSHIGE , SUZUKI KAZUNOBU , YAMAMOTO TAKASHI , KANDA ATSUSHI , NAKAMURA MAKOTO , TOBAYASHI MASATOSHI , ENDO MASAHIRO
IPC分类号： H04B10/2507 , H04B3/06 , H04B10/07 , H04B10/2513 , H04B10/2525 , H04B10/28 , H04B10/40 , H04B10/50 , H04B10/60 , H04B10/67 , H04B10/69
摘要： PROBLEM TO BE SOLVED: To provide a cross-point detection circuit for easily detecting a cross-point of a receiving optical signal and also provide an optical receiving apparatus for optimum control of an electrical waveform equalizing circuit and an optical variable dispersion compensating circuit of the optical receiving apparatus using the detected cross-point value.
SOLUTION: A bias voltage is superimposed to a signal from which the DC element is cut off through AC coupling of an electrical signal photoelectrically converted from the receiving optical signal. The signal to which the bias voltage is superimposed is amplified with an automatic gain control amplifying circuit to detect an average voltage of output signal of this circuit. Moreover, a tap coefficient of the electrical waveform equalizing circuit is optimum-controlled using the detected average voltage value.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于容易地检测接收光信号的交叉点的交叉点检测电路，并且还提供用于最佳控制电波形均衡电路和光可变色散补偿的光接收装置使用所检测的交叉点值的光接收装置的电路。解决方案：通过从接收光信号光电转换的电信号的AC耦合，将偏置电压叠加到DC元件被切断的信号上。叠加偏置电压的信号用自动增益控制放大电路放大，以检测该电路的输出信号的平均电压。此外，使用检测到的平均电压值对电波形均衡电路的抽头系数进行最佳控制。版权所有（C）2010，JPO＆INPIT

10. 发明专利

JP2009115945A Multi-wavelength light source device 有权
标题翻译：多波长光源设备
公开(公告)号：JP2009115945A
公开(公告)日：2009-05-28
申请号：JP2007287143
申请日：2007-11-05
申请人： Nippon Telegr & Teleph Corp , 日本電信電話株式会社
发明人： YAMAMOTO TAKASHI , KUROKAWA KENJI , SAKAMOTO YASUSHI
IPC分类号： G02F1/01
摘要： PROBLEM TO BE SOLVED: To provide a multi-wavelength light source device, which can increase the wavelength number at remarkably higher efficiency as compared with the number of modulators while keeping the input electric signal intensity to a phase modulator smaller than the input limit of the modulator.
SOLUTION: The multi-wavelength light source device includes a CW laser light source 10, two Mach-Zehnder intensity modulators 21, 22, and two phase modulators 31, 32, wherein the Mach-Zehnder intensity modulators 21, 22, and the phase modulators 31, 32 are serially-connected to the laser light source 10 in an optional order, and two kinds of electric signals generated by two synthesizers 41, 42 generating two kinds of frequencies f1, f2 satisfying the relationship expressed by f1=n×f2, respectively, are used as modulation signals for performing intensity modulation of the Mach-Zehnder intensity modulators 21, 22 and the phase modulation of the phase modulators 31, 32 to thereby generate multi-wavelength light.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供一种多波长光源装置，其能够将调制器的数量与调制器的数量相比显着提高，同时将输入的电信号强度保持在小于输入的相位调制器调制器的极限。解决方案：多波长光源装置包括CW激光光源10，两个马赫 - 曾德尔强度调制器21,22和两个相位调制器31,32，其中马赫 - 曾德尔强度调制器21,22和相位调制器31,32以可选顺序串联连接到激光光源10，并且由两个合成器41,42产生的两种电信号产生满足由f1 = n表示的关系的两种频率f1，f2 ×f2分别用作用于执行马赫 - 曾德尔强度调制器21,22的强度调制和相位调制器31,32的相位调制的调制信号，从而产生多波长光。版权所有（C）2009，JPO＆INPIT

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