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1. 发明专利

JP2007064860A Photoelectric field waveform observation device 有权
标题翻译：光电场波形观测装置
公开(公告)号：JP2007064860A
公开(公告)日：2007-03-15
申请号：JP2005252978
申请日：2005-09-01
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： KIKUCHI NOBUHIKO
IPC分类号： G01J11/00 , H04B10/07 , H04B10/079 , H04B10/25 , H04B10/524 , H04B10/54 , H04B10/556 , H04B10/58
CPC分类号： G01J9/02 , G01J11/00
摘要： PROBLEM TO BE SOLVED: To solve a problem wherein a light phase modulation waveform is difficult to be measured precisely, in particular, interference between codes is difficult to be acquired, because of a noise on a signal or an influence of phase fluctuation in a light source.
SOLUTION: An output light from a laser beam source 101 is branched. One is modulated by a light modulator 108, the other is delayed by a delay line by the same quantity, and is input thereafter into a phase diversity circuit 113 to construct a homodyne interferometer. A light input sampling oscilloscope 120-1 stabilizes a variable light phase shifter 110 to bring a light phase at a specified time into a fixed value, using a pattern synchronization signal 109 as a reference, a light input sampling oscilloscope 120-2 acquires a light waveforms to be averaged repeatedly, and a CPU 122 displays three-dimensionally a photoelectric field waveform from which the noise is removed.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题为了解决难以精确地测量光相位调制波形的问题，特别是由于信号上的噪声或相位波动的影响，难以获得代码之间的干扰在光源中。解决方案：来自激光束源101的输出光被分支。一个由光调制器108调制，另一个被延迟线延迟相同的量，然后输入到相位分集电路113中以构成零差干涉仪。光输入采样示波器120-1使可变光移相器110使用图案同步信号109作为参考，将指定时间的光相位固定为固定值，光输入采样示波器120-2获取光波形被重复平均，并且CPU 122三维地显示去除噪声的光电场波形。版权所有（C）2007，JPO＆INPIT

2. 发明专利

JP2006339760A Optical transmission apparatus and integrated circuit device 有权
标题翻译：光传输设备和集成电路设备
公开(公告)号：JP2006339760A
公开(公告)日：2006-12-14
申请号：JP2005158926
申请日：2005-05-31
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： KIKUCHI NOBUHIKO
IPC分类号： H04B10/40 , H04B10/07 , H04B10/50 , H04B10/516 , H04B10/524 , H04B10/54 , H04B10/556 , H04B10/60 , H04B10/61 , H04B10/67 , H04B10/69 , H04J14/00 , H04J14/02 , H04L27/34
CPC分类号： H04B10/5051 , H04B10/5053 , H04B10/5055 , H04B10/5161 , H04B10/541 , H04B10/5561 , H04B10/66 , H04L27/2096 , H04L27/223
摘要： PROBLEM TO BE SOLVED: To provide an optical transmission apparatus electrically adjusting a delay time difference of a plurality of digital signal paths to be connected to a multi-value optical modulation section or a demodulation section. SOLUTION: The optical transmission apparatus is provided with a delay control section that is located in the electric digital signal paths needing a signal delay, controls a delay of parallel low speed digital signals in N bits in the unit of a bit time of a high speed serial digital signal sequence and fine-adjusts a delay of the high speed serial digital signal sequence within 1 bit time with an output timing control of each bit of the high speed serial digital signal sequence output from a multiplexer circuit. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种光学传输装置，其电调节要连接到多值光调制部分或解调部分的多个数字信号路径的延迟时间差。解决方案：光传输设备设置有延迟控制部分，其位于需要信号延迟的电数字信号路径中，以比特时间为单位的N位中的并行低速数字信号的延迟进行控制高速串行数字信号序列，并且在1位时间内对来自多路复用器电路输出的高速串行数字信号序列的每个位的输出定时控制精细调整高速串行数字信号序列的延迟。版权所有（C）2007，JPO＆INPIT

3. 发明专利

JP2004356742A Signal waveform deterioration compensating apparatus 有权
公开(公告)号：JP2004356742A
公开(公告)日：2004-12-16
申请号：JP2003149513
申请日：2003-05-27
申请人： Hitachi Communication Technologies Ltd , Hitachi Ltd , 株式会社日立コミュニケーションテクノロジー , 株式会社日立製作所
发明人： KIKUCHI NOBUHIKO , HAYASE SHIGENORI
IPC分类号： H04B10/2507 , H04B10/07 , H04B10/2525 , H04B10/2569 , H04B10/29 , H04B10/556 , H04J14/00 , H04J14/02 , H04B10/02 , H04B10/18
CPC分类号： H04B10/2507
摘要： PROBLEM TO BE SOLVED: To provide a signal waveform deterioration compensating apparatus capable of extending a detection range of waveform deterioration and being compatible with multi bit rates.
SOLUTION: A wavelength dispersion compensation apparatus (or polarized wave dispersion compensating apparatus) 102 receives an NRZ optical signal received from an input fiber 101 and whose waveform is deteriorated to compensate the signal. On the other hand, a photodetector 106 receives part of output light and a sampling circuit (A/D converter) 107 applies asynchronous sampling to a received waveform strength. A control circuit 103 calculates an N-th power even number moment (N is four or over) on the basis of a frequency distribution of obtained waveform amplitudes and controls the value to be minimized.
COPYRIGHT: (C)2005,JPO&NCIPI

4. 发明专利

JP2009055212A Optical transmission system and signal speed converter 有权
标题翻译：光传输系统和信号速度转换器
公开(公告)号：JP2009055212A
公开(公告)日：2009-03-12
申请号：JP2007218704
申请日：2007-08-24
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： KIKUCHI NOBUHIKO , FUKUSHIMA TAKAO , SAKAKIDA NAOHIRO , NAKANO HIROYUKI
IPC分类号： H04L29/00 , H04J3/00 , H04J14/00 , H04J14/02
CPC分类号： H04J14/02 , H04L1/0057 , H04L1/0071 , H04L69/08
摘要： PROBLEM TO BE SOLVED: To provide a signal speed converter which is logically independent of a wavelength multiplex transmission terminal station. SOLUTION: The signal speed converter includes: a first optical interface connected to a first optical line group; a plurality of second optical interfaces connected to a second optical line group; and a speed conversion part, wherein the first optical interface has a first framer which terminates a frame of a first format received from the first optical line group and outputs an information signal extracted from the received frame as a serial or parallel signal string, the speed conversion part cyclically distributes an output signal from the first framer to a plurality of internal lines to convert the output signal into a plurality of transmission signals including an interleave communication frame, each of the second optical interfaces has a second framer which converts the communication frame received from the internal line into an information frame of a second format to be transmitted to the second optical line group, and a management information insertion means for individually inserting management information which is to be communicated with the opposite device into transmission signal strings on the respective internal lines between the first and second optical interfaces. COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供在逻辑上独立于波长多路传输终端站的信号速度转换器。解决方案：信号速度转换器包括：连接到第一光线路组的第一光学接口; 连接到第二光线路组的多个第二光学接口; 以及速度转换部，其中，所述第一光学接口具有终止从所述第一光线路组接收的第一格式的帧的第一成帧器，并将从所接收的帧提取的信息信号作为串行或并行信号串输出，所述速度转换部分将来自第一成帧器的输出信号循环地分配到多个内部线路，以将输出信号转换成包括交织通信帧的多个传输信号，每个第二光学接口具有第二成帧器，其转换所接收的通信帧从内线进入要发送到第二光线路组的第二格式的信息帧;以及管理信息插入装置，用于将要与对方设备通信的管理信息单独插入到相应内部的传输信号串中第一和第二光学接口之间的线。版权所有（C）2009，JPO＆INPIT

5. 发明专利

JP2006217010A Optical wavelength add/drop module and optical network employing the same 有权
标题翻译：光学波长增加模块和使用其的光网络
公开(公告)号：JP2006217010A
公开(公告)日：2006-08-17
申请号：JP2005024840
申请日：2005-02-01
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： KIKUCHI NOBUHIKO
IPC分类号： H04B10/03 , H04B10/032 , H04B10/27 , H04B10/275 , H04B10/29 , H04J14/00 , H04J14/02
CPC分类号： H04J14/0295 , H04J14/0206 , H04J14/0212 , H04J14/0227 , H04J14/0246 , H04J14/025 , H04J14/0283 , H04J14/0284 , H04J14/0286 , H04J14/0294
摘要： PROBLEM TO BE SOLVED: To provide a simple optical protection system in an optical wavelength add/drop module for solving a problem, wherein the cost and mounting space are increased and service-in is delayed, because an optical switch or an optical switch control circuit is required to be arranged individually in the front and the rear of an optical transmitter/receiver performing optical protection. SOLUTION: Optical protection is realized by making possible to control add switches 105-1 to 105-N and optical drop switches 103-1 to 103-N for the optical signal of respective wavelengths in an optical wavelength add/drop module 100 independently, and switching the add switch and drop switch of the optical wavelength add/drop devices on the operating side and the stand-by side for detouring faults, by means of optical switch control circuits 106-1 to 106-N. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了提供光波长分插模块中的简单的光学保护系统，用于解决问题，其中成本和安装空间增加并且服务延迟，因为光学开关或光学开关控制电路需要分别布置在执行光学保护的光发射机/接收机的前后。解决方案：通过使光波长分插模块100中的各波长的光信号的加法开关105-1至105-N和光降开关103-1至103-N可以实现光保护通过光开关控制电路106-1至106-N独立地切换操作侧和待机侧的光波长分插装置的添加开关和下拉开关，以使迂回故障发生。版权所有（C）2006，JPO＆NCIPI

6. 发明专利

JP2006180417A Optical transmission apparatus 审中-公开
标题翻译：光传输装置
公开(公告)号：JP2006180417A
公开(公告)日：2006-07-06
申请号：JP2004374130
申请日：2004-12-24
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： HASEGAWA CHIE , SEKINE KENRO , KIKUCHI NOBUHIKO
IPC分类号： H04B10/11 , H04B10/07 , H04B10/112 , H04B10/293 , H04B10/564 , H04B10/572 , H04J14/00 , H04J14/02
摘要： PROBLEM TO BE SOLVED: To suppress a power level of a wavelength multiplexed signal other than a wavelength allocated for branch insertion, from being varied if any fault occurs on an optical spatial transmission line in a network node coupling an optical add-drop device and an optical spatial transmission device. SOLUTION: An optical transmission apparatus transmits, to an external space, a signal light split from a wavelength multiplexed signal by a light splitting means inside the optical add-drop device and inserts a signal light received from the outside into the wavelength multiplexed signal by a light inserting means inside the optical add-drop device, and the optical transmission apparatus comprises an optical amplifier for keeping constant a power level of the signal received from the outside. Furthermore, the optical transmission apparatus includes an optical switch for loop-back for looping back the signal light split from the wavelength multiplexed signal by the light splitting means and inserting the signal light into the wavelength multiplexed signal by the light inserting means if the signal light from the outside is turned into signal interruption state. COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了抑制分配给分支插入的波长复用信号以外的波长复用信号的功率电平，如果在耦合光学分插的网络节点中的光空间传输线上发生任何故障，则变化设备和光学空间传输设备。解决方案：光传输装置通过光分插装置内的光分离装置向外部空间发送从波长多路复用信号分离的信号光，并将从外部接收的信号光插入波长多路复用信号通过光插入装置内的光插入装置，并且光传输装置包括用于保持从外部接收的信号的功率电平恒定的光放大器。此外，光传输装置包括用于环回的光开关，用于使由分光装置从波长多路复用信号分离的信号光环回，并且如果信号光线将信号光插入到波长多路复用信号中从外部变成信号中断状态。版权所有（C）2006，JPO＆NCIPI

7. 发明专利

JP2005229165A Optical branch insertion multiplexing apparatus 有权
标题翻译：光分路插入式多路复用器
公开(公告)号：JP2005229165A
公开(公告)日：2005-08-25
申请号：JP2004033151
申请日：2004-02-10
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： SASAKI SHINYA , KIKUCHI NOBUHIKO , SEKINE KENRO
IPC分类号： H04B10/00 , H04B10/27 , H04B10/29 , H04J14/00 , H04J14/02 , H04B10/02
CPC分类号： H04J14/0216 , H04J14/0212 , H04J14/0217
摘要： PROBLEM TO BE SOLVED: To solve the problem that a plurality of optical branch insertion multiplexing apparatus to be provided in a communication node are required for each direction and this causes increase in communication cost, in an optical communication system for performing bidirectional transmission between communication nodes by a wavelength multiplexed signal.
SOLUTION: An optical circulator or an optical coupler is disposed on an input/output port of an optical branch insertion multiplexing apparatus to put together signals optical-wavelength multiplexed for each direction, thereby handling signals to be bidirectionally transmitted with a single optical branch insertion multiplexing apparatus.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：解决的问题为了解决在每个方向上需要设置在通信节点中的多个光分支插入复用装置的问题，并且这导致通信成本的增加，在用于执行双向传输的光通信系统中在通信节点之间通过波长复用信号。解决方案：光循环器或光耦合器设置在光分路插入多路复用装置的输入/输出端口上，以将每个方向光波长多路复用的信号组合在一起，从而处理使用单个光学双向传输的信号分支插入复用装置。版权所有（C）2005，JPO＆NCIPI

8. 发明专利

JP2010028795A Balanced compensation type optical balanced receiver and optical iq receiver 有权
标题翻译：平衡补偿型光平衡接收器和光接收器
公开(公告)号：JP2010028795A
公开(公告)日：2010-02-04
申请号：JP2009096048
申请日：2009-04-10
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： BANDAI KOHEI , KIKUCHI NOBUHIKO
IPC分类号： H04B10/516 , H04B10/548 , H04B10/58 , H04B10/61
CPC分类号： H04B10/677 , H04B10/60
摘要： PROBLEM TO BE SOLVED: To compensate for deterioration in a received signal due to a difference of a loss or that of a delay on different paths from two output terminals of an optical coupler to a difference device in an optical balanced receiver. SOLUTION: An optical coupler 101 makes an optical information signal to be input interfere in an optical reference signal and outputs two interfering light beams whose phases are opposite to each other. Photodetectors 102, 103 output detection signals obtained by converting intensities of the interfering light beams into electrical signals. A balanced compensation type difference device 131 compensates for differences in amplitude and delay between two detection signals 205, 206 in accordance a control signal to be input, and outputs a compensated difference signal of the two detection signals. A control circuit 132 generates the control signal by inputting an observation signal 225 from the balanced compensation type difference device 131 and outputs it to the balanced compensation type difference device 131. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：为了补偿光耦合器的两个输出端子到光学平衡接收器中的差分器件的不同路径上的损耗差或延迟的差异导致的接收信号的劣化。解决方案：光耦合器101使光信息信号输入干涉光参考信号，并输出相位彼此相反的两个干涉光束。光检测器102,103输出通过将干扰光束的强度转换为电信号而获得的检测信号。平衡补偿型差分装置131根据要输入的控制信号补偿两个检测信号205,206之间的幅度和延迟的差异，并输出两个检测信号的补偿差分信号。控制电路132通过从平衡补偿型差分装置131输入观察信号225而产生控制信号，并将其输出到平衡补偿型差分装置131.版权所有（C）2010，JPO＆INPIT

9. 发明专利

JP2007171548A Optical modulator, optical transmitter and optical transmitting device 有权
标题翻译：光学调制器，光发射机和光传输设备
公开(公告)号：JP2007171548A
公开(公告)日：2007-07-05
申请号：JP2005369010
申请日：2005-12-22
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： KIKUCHI NOBUHIKO
IPC分类号： G02F1/03 , H04B10/00 , H04B10/516 , H04B10/61
CPC分类号： G02F1/0123 , G02F1/025 , G02F2001/212 , G02F2201/127 , H04B10/505 , H04B10/5051 , H04B10/50575
摘要： PROBLEM TO BE SOLVED: To provide an optical modulator adopting a control circuit of bias voltage of an optical modulator, which is inexpensive, applicable in a wide range and hardly influenced by change of optical modulation waveform.
SOLUTION: In the optical modulator 100 which applies CSRZ optical modulation to emitted light from a light source 101, the controlled light input from a controlled light input path 105 is input in an LN-MZ optical modulator 102 having progress wave type modulation electrode from the direction opposite to that of a signal light and average light intensity is detected by a photodetector 108. The bias voltage Vb is generated so that the optical intensity is minimized, and impressed to a bias input terminal 111 to perform automatic bias stabilization control.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种光调制器，该光调制器采用廉价的光调制器的偏置电压控制电路，可广泛应用并且几乎不受光调制波形变化的影响。解决方案：在对来自光源101的发射光进行CSRZ光调制的光调制器100中，从受控光输入路径105输入的受控光被输入到具有进行波型调制的LN-MZ光调制器102中电极从与信号光的方向相反的方向和平均光强度被光电检测器108检测。产生偏置电压Vb，使得光强度最小化，并且将其施加到偏置输入端子111以执行自动偏置稳定控制。版权所有（C）2007，JPO＆INPIT

10. 发明专利

JP2009231881A Pre-distortion transmitter and pre-distortion transmission system 有权
标题翻译：预失真发射机和预失真传输系统
公开(公告)号：JP2009231881A
公开(公告)日：2009-10-08
申请号：JP2008071260
申请日：2008-03-19
申请人： Hitachi Communication Technologies Ltd , 株式会社日立コミュニケーションテクノロジー
发明人： KIKUCHI NOBUHIKO
IPC分类号： H04B10/2507 , H04B10/2513 , H04B10/2525 , H04B10/516 , H04B10/61
CPC分类号： H04B10/25137 , H04B10/5055 , H04B2210/254
摘要： PROBLEM TO BE SOLVED: To eliminate the degradation in transmission characteristics of a one-sample/bit optical duobinary system. SOLUTION: The pre-distortion transmitter includes: a laser light source; a duobinary encoding circuit; a pre-distortion circuit which applies an inverse function of wavelength dispersion; two or more DA converters; and an optical electric field modulator having two or more electric signal input terminals. The pre-distortion transmitter converts a digital information signal of predetermined symbol time to be transmitted into a digital complex signal including one sample point for each symbol by the duobinary encoding circuit, equalizes transmission degradation of the digital complex signal by the pre-distortion circuit, converts the equalized digital complex signal into an analog signal by the DA converters and suppresses a signal leaking exceeding a Nyquist bandwidth among converted analog signal by ≥23 dB, and modulates light output from the laser light source into an optical electric field signal using the analog signal by the optical electric field modulator and transmits the modulated optical electric field signal. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：消除单样本/位光学双二进制系统的传输特性的降低。解决方案：预失真发射机包括：激光源; 双二进制编码电路; 施加波长色散的反函数的预失真电路; 两个或多个DA转换器; 以及具有两个以上的电信号输入端子的光电调制器。预失真发送器将预定符号时间的数字信息信号通过双二进制编码电路转换为包含每个符号的一个采样点的数字复合信号，均衡由预失真电路产生的数字复信号的传输劣化，通过DA转换器将均衡的数字复合信号转换为模拟信号，并且将转换的模拟信号之间的超过奈奎斯特带宽的信号抑制≥23dB，并且使用模拟信号将激光源的光输出调制为光电信号信号由光电调制器发射并传输调制的光电信号。版权所有（C）2010，JPO＆INPIT

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