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11. 发明授权

EP1848128B1 Optical communication device and quantum key distribution system using the same 有权
标题翻译：光通信装置和量子密钥分配系统
公开(公告)号：EP1848128B1
公开(公告)日：2010-10-27
申请号：EP07090078.2
申请日：2007-04-20
申请人： NEC Corporation
发明人： Tanaka, Akihiro , Tajima, Akio , Takahashi, Seigo , Maeda, Wakako
IPC分类号： H04B10/155 , H04L9/08 , H04B10/30
CPC分类号： H04B10/5051 , H04B10/505 , H04B10/54 , H04B10/548 , H04B10/70 , H04L9/0858

12. 发明公开

EP1808761A2 Circuit and method for controlling quality of random numbers 有权
标题翻译： Schaltung und Verfahren zur Kontrolle derQualitätvon Zufallszahlen
公开(公告)号：EP1808761A2
公开(公告)日：2007-07-18
申请号：EP07100257.0
申请日：2007-01-09
申请人： NEC CORPORATION
发明人： Tanaka, Akihiro , Tajima, Akio , Takahashi, Seigo , Maeda, Wakako
IPC分类号： G06F7/58
CPC分类号： H04L9/0852 , G06F7/58 , H04L9/0838
摘要： A random number quality control circuit capable of fast control of the level of random number quality is present. When a "0" output section and a "1" output section generate random numbers by individually receiving a random number signal, a random number quality monitor monitors an unbalance between the numbers of "0"s and "1"s. If a deviation from a desired ratio is found, a drive controller controls the reception characteristics of the "0" output section and "1" output section individually so that the deviation will be compensated for. The amount of information intercepted between a sender and a receiver can be reduced by maintaining the mark ratio of shared random numbers at 50%.
摘要翻译：存在能够快速控制随机数量级别的随机数质量控制电路。当“0”输出部分和“1”输出部分通过分别接收随机数信号产生随机数时，随机数质量监视器监视“0”和“1”之间的不平衡。如果发现与期望比率的偏差，则驱动控制器分别控制“0”输出部分和“1”输出部分的接收特性，以便补偿偏差。通过将共享随机数的标记比维持在50％，可以减少发送方和接收方之间所拦截的信息量。

13. 发明公开

EP0923263A3 Optical packet exchange system and optical switch 有权
标题翻译： Vermittlungssystemfüroptische Pakete und optisches Koppelfeld
公开(公告)号：EP0923263A3
公开(公告)日：2007-01-03
申请号：EP98123440.4
申请日：1998-12-11
申请人： NEC CORPORATION
发明人： Araki, Soichiro , Suemura, Yoshihiko , Tajima, Akio , Takahashi, Seigo , Maeno, Yoshiharu , Henmi, Naoya
IPC分类号： H04Q11/00 , H04L12/56
CPC分类号： H04Q11/0001 , H04L49/25 , H04L49/30 , H04L49/50 , H04Q2011/0024 , H04Q2011/0039 , H04Q2011/0045 , H04Q2011/005
摘要： An optical packet exchange apparatus and an optical switch in which search for a connection pattern between an input unit devoid of a packet to be transmitted and an output unit devoid of a packet to be received is reduced to enable fast switch control even in cases wherein the number of channels of the exchange apparatus is increased or network speed is higher. A plurality of input units, a plurality of output units and an optical switch are provided. Each input unit includes an input buffer unit, a parallel/serial conversion unit, an electrical/optical conversion unit, and a dummy packet insertion unit for sending a dummy packet if there is no packet to be transmitted. Each output unit includes an exchange counterpart contention resolution unit for controlling the exchange counterpart, an optical/electrical conversion unit, a serial/parallel conversion unit, and a packet eliminating unit. The exchange counterpart contention resolution unit controls the packet eliminating unit to eliminate a dummy packet.
摘要翻译：一种光分组交换装置和光开关，其中，在没有要发送的分组的输入单元和不具有要接收的分组的输出单元之间的连接模式的搜索被减少以便能够快速切换控制，即使在交换装置的信道数量增加或网络速度较高。提供多个输入单元，多个输出单元和光学开关。每个输入单元包括输入缓冲器单元，并行/串行转换单元，电/光转换单元和用于在不存在要发送的分组的情况下发送虚拟分组的虚拟分组插入单元。每个输出单元包括用于控制交换对方的交换对方争用解决单元，光/电转换单元，串行/并行转换单元和分组消除单元。交换对手争用解决单元控制分组消除单元以消除虚拟分组。

14. 发明公开

EP0923263A2 Optical packet exchange system and optical switch 有权
标题翻译： Kopplungssystemfüroptische Pakete und optisches Koppelfeld
公开(公告)号：EP0923263A2
公开(公告)日：1999-06-16
申请号：EP98123440.4
申请日：1998-12-11
申请人： NEC CORPORATION
发明人： Araki, Soichiro , Suemura, Yoshihiko , Tajima, Akio , Takahashi, Seigo , Maeno, Yoshiharu , Henmi, Naoya
IPC分类号： H04Q11/00
CPC分类号： H04Q11/0001 , H04L49/25 , H04L49/30 , H04L49/50 , H04Q2011/0024 , H04Q2011/0039 , H04Q2011/0045 , H04Q2011/005
摘要： An optical packet exchange apparatus and an optical switch in which search for a connection pattern between an input unit devoid of a packet to be transmitted and an output unit devoid of a packet to be received is reduced to enable fast switch control even in cases wherein the number of channels of the exchange apparatus is increased or network speed is higher. A plurality of input units, a plurality of output units and an optical switch are provided. Each input unit includes an input buffer unit, a parallel/serial conversion unit, an electrical/optical conversion unit, and a dummy packet insertion unit for sending a dummy packet if there is no packet to be transmitted. Each output unit includes an exchange counterpart contention resolution unit for controlling the exchange counterpart, an optical/electrical conversion unit, a serial/parallel conversion unit, and a packet eliminating unit. The exchange counterpart contention resolution unit controls the packet eliminating unit to eliminate a dummy packet.
摘要翻译：一种光分组交换装置和光开关，其中，在没有要发送的分组的输入单元和不具有要接收的分组的输出单元之间的连接模式的搜索被减少以便能够快速切换控制，即使在交换装置的信道数量增加或网络速度较高。提供多个输入单元，多个输出单元和光学开关。每个输入单元包括输入缓冲器单元，并行/串行转换单元，电/光转换单元和用于在不存在要发送的分组的情况下发送虚拟分组的虚拟分组插入单元。每个输出单元包括用于控制交换对方的交换对方争用解决单元，光/电转换单元，串行/并行转换单元和分组消除单元。交换对手争用解决单元控制分组消除单元以消除虚拟分组。

15. 发明公开

EP1848142A3 Secret communications system and channel control method 有权
标题翻译：系统，用于保密通信和信道控制方法
公开(公告)号：EP1848142A3
公开(公告)日：2014-07-02
申请号：EP07007732.6
申请日：2007-04-16
申请人： NEC Corporation
发明人： Tajima, Akio , Tanaka, Akihiro , Maeda, Wakako , Takahashi, Seigo
IPC分类号： H04L9/08
CPC分类号： H04L9/0852 , H04L9/0855
摘要： A secret communications system realizes point-to-multipoint or multipoint-to-multipoint connections of both quantum channels and classical channels. Multiple remote nodes are individually connected to a center node through optical fiber, and random-number strings K1 to KN are individually generated and shared between the respective remote nodes and the center node. Encrypted communication is performed between each remote node and the center node by using the corresponding one of the shared random-number strings K1 to KN as a cryptographic key. The center node is provided with a switch section for quantum channels and a switch section for classical channels. Switching control on each of these switch sections is performed independently of the other by a controller.

16. 发明公开

EP1848128A1 Optical communication device and quantum key distribution system using the same 有权
标题翻译： Optische Kommunikationsvorrichtung undQuantenschlüsselverteilungssystem
公开(公告)号：EP1848128A1
公开(公告)日：2007-10-24
申请号：EP07090078.2
申请日：2007-04-20
申请人： NEC Corporation
发明人： Tanaka, Akihiro , Tajima, Akio , Takahashi, Seigo , Maeda, Wakako
IPC分类号： H04B10/155 , H04L9/08 , H04B10/30
CPC分类号： H04B10/5051 , H04B10/505 , H04B10/54 , H04B10/548 , H04B10/70 , H04L9/0858
摘要： An optical communication apparatus that can perform stable intensity and phase modulation on an optical pulse at high speed is provided, as well as a quantum key distribution system using the apparatus. Using multilevel signals for the electric signals (RF1, RF2) to be applied to two arms of a two-electrode Mach-Zehnder modulator, phase modulation is performed on an optical pulse in accordance with the average of the levels of the signals (RF1, RF2), and intensity modulation is performed on the optical pulse in accordance with the voltage difference between the signals (RF1, RF2), whereby stable high-speed multilevel modulation can be realized. The cryptographic key generation rate in a decoy quantum key distribution system is enhanced.
摘要翻译：提供了可以对光脉冲高速执行稳定的强度和相位调制的光通信装置，以及使用该装置的量子密钥分发系统。使用多电平信号将电信号（RF1，RF2）施加到两电极马赫 - 策德尔调制器的两个臂上，根据信号电平（RF1，RF2）的平均值对光脉冲进行相位调制， RF2），并且根据信号（RF1，RF2）之间的电压差对光脉冲执行强度调制，从而可以实现稳定的高速多电平调制。诱饵量子密钥分发系统中的加密密钥生成率得到提高。

17. 发明公开

EP1780912A1 Method and apparatus for measuring optical power of very weak light, and optical communication system using the same 审中-公开
标题翻译：对于具有相同测量非常弱的光传输系统的光功率的方法和设备
公开(公告)号：EP1780912A1
公开(公告)日：2007-05-02
申请号：EP06022726.1
申请日：2006-10-31
申请人： NEC CORPORATION
发明人： Maeda, Wakako , Tajima, Akio , Tanaka, Akihiro , Takahashi, Seigo
IPC分类号： H04B10/158 , H04L9/08
CPC分类号： H04B10/66 , H04L9/0852
摘要： A method and apparatus for measuring the optical power of very weak light arriving at a receiver, by using a photon detector, are provided. A photon detector detects the presence or absence of the arrival of a photon in accordance with bias application timing. For a train of optical pulses coming in at an arbitrary timing in respective time slots, the bias application timing is sequentially shifted within the range of a time slot. Each time a shift is made, the number of photons detected is counted by a photon counter. Based on this number of photons, the optical power of the train of the optical pulses is measured.
摘要翻译：一种用于测量非常弱的光到达接收器的光功率的方法和设备，通过使用光子检测器，提供了。光子检测器检测光子的雅舞蹈到达与偏压施加定时的存在或不存在。用于光学脉冲序列在未来中在任意的定时中respectivement时隙，偏压施加时序被顺序地一个时隙的范围内移动。每一个移位由时间，检测到的光子的数目由一个光子计数器计数。在此基础上光子数，光脉冲串的光功率被测量。

18. 发明公开

EP1742408A2 Communication system and synchronization control method 有权
标题翻译： Kommunikationssystem und Vorrichtung zur同步Steuerung
公开(公告)号：EP1742408A2
公开(公告)日：2007-01-10
申请号：EP06014154.6
申请日：2006-07-07
申请人： NEC Corporation
发明人： Tanaka, Akihiro , Tajima, Akio , Takahashi, Seigo , Maeda, Wakako
IPC分类号： H04L9/08
CPC分类号： H04L9/0852
摘要： A sender transmits to a receiver an optical signal that is phase-modulated in accordance with source data and a basis stored in a memory. The receiver phase-modulates the received optical signal in accordance with a basis, obtains detection data through interference, and stores the detection data in a memory. An inter-device address difference (G D ) and an intra-device address difference (D I ) are provisionally set. The detection data are checked against the source data while sequentially changing the values of G D and D I within a predetermined adjustment range. Based on the result of this checking, G D and D I are determined.
摘要翻译：发送方向接收机发送根据源数据和存储在存储器中的基础进行相位调制的光信号。接收机根据基础对接收到的光信号进行相位调制，通过干扰获得检测数据，并将检测数据存储在存储器中。临时设置设备间地址差（G D）和设备内地址差（D I）。根据源数据检查检测数据，同时在预定调整范围内依次改变G D和D I的值。根据该检查的结果，确定G D和D I。

19. 发明公开

EP0914015A2 Optical switch, optical amplifier and optical power controller as well as optical add-drop multiplexer 有权
标题翻译：光开关，光放大器和光功率控制器以及光分插复用器
公开(公告)号：EP0914015A2
公开(公告)日：1999-05-06
申请号：EP98120406.8
申请日：1998-10-28
申请人： NEC CORPORATION
发明人： Shimomura, Hirofumi , Takahashi, Seigo , Henmi, Naoya
IPC分类号： H04Q11/00 , H04J14/02
CPC分类号： H04Q11/0001 , H01S3/06754 , H01S3/06758 , H01S3/094061 , H01S3/10007 , H01S3/1608 , H04J14/0204 , H04J14/0206 , H04J14/0212 , H04J14/0213 , H04J14/0221
摘要： The first present invention provides a optical switch including the following elements. At least a plurality of optical transmission lines are provided for transmissions of optical signals. Each of the at least plurality of optical transmission lines have at least an impurity doped fiber. At least an excitation light source is provided for emitting an excitation light. At least a excitation light switch is provided which is connected to the excitation light source and also connected to the at least plurality of optical transmission lines for individual switching operations to supply the excitation light to the at least plurality of optical transmission lines to feed the excitation light to the impurity doped fiber on the at least plurality of optical transmission lines, thereby causing an excitation of the impurity doped fiber on selected one of the at least plurality of optical transmission lines so as to permit a transmission of the optical signal through the excited impurity doped fiber, whilst unselected one of the impurity doped fibers is unexcited whereby the optical signals are absorbed into the unselected one of the impurity doped fibers thereby to discontinue transmission of the optical signal by the unselected one of the impurity doped fibers.
摘要翻译：本发明的第一个目的是提供一种包括以下元件的光开关。提供至少多个光学传输线用于传输光信号。至少多个光学传输线中的每一个至少具有掺杂杂质的光纤。至少提供用于发射激发光的激发光源。提供至少一个激励光开关，其被连接到激励光源并且还被连接到至少多个光学传输线用于单独的切换操作以将激励光提供给至少多个光学传输线以馈送激励光照射到所述至少多个光学传输线上的杂质掺杂光纤，从而引起所述至少多个光学传输线中选定的一个光学传输线上的掺杂光纤的激励，从而允许光学信号通过激发的传输杂质掺杂光纤，而未被选择的掺杂光纤之一是未激励的，由此光信号被吸收到未选中的一个杂质掺杂光纤中，从而停止未选中一个杂质掺杂光纤传输光信号。

20. 发明授权

EP1742408B1 COMMUNICATION SYSTEM AND SYNCHRONIZATION CONTROL METHOD 有权
标题翻译：通信系统和同步控制方法
公开(公告)号：EP1742408B1
公开(公告)日：2018-03-07
申请号：EP06014154.6
申请日：2006-07-07
申请人： NEC Corporation
发明人： Tanaka, Akihiro , Tajima, Akio , Takahashi, Seigo , Maeda, Wakako
IPC分类号： H04L9/08
CPC分类号： H04L9/0852
摘要： A sender transmits to a receiver an optical signal that is phase-modulated in accordance with source data and a basis stored in a memory. The receiver phase-modulates the received optical signal in accordance with a basis, obtains detection data through interference, and stores the detection data in a memory. An inter-device address difference (G D ) and an intra-device address difference (D I ) are provisionally set. The detection data are checked against the source data while sequentially changing the values of G D and D I within a predetermined adjustment range. Based on the result of this checking, G D and D I are determined.

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