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1. 发明授权

US07200328B2 Method and system for determining origin of optical signal quality degradation 有权
标题翻译：确定光信号质量下降原因的方法和系统
公开(公告)号：US07200328B2
公开(公告)日：2007-04-03
申请号：US10173752
申请日：2002-06-19
申请人： Ippei Shake , Hidehiko Takara , Kentaro Uchiyama
发明人： Ippei Shake , Hidehiko Takara , Kentaro Uchiyama
IPC分类号： H04B10/08
CPC分类号： H04B10/07951 , H04B10/07953
摘要： A monitoring system includes first and second evaluation sections for obtaining an averaged Q-factor parameter and a waveform distortion parameter from an optical signal amplitude histogram collected from optical signals under measurement. The monitoring system further includes a third evaluation section for determining both averaged Q-factor parameter and waveform distortion parameter, and for making a decision as to whether the main factor of the optical signal quality degradation is waveform distortion or not by comparing the averaged Q-factor parameter and waveform distortion parameter with their initial values or initial characteristics which are obtained when no optical signal quality degradation is present.
摘要翻译：监视系统包括第一和第二评估部分，用于从根据测量的光信号收集的光信号幅度直方图获得平均的Q因子参数和波形失真参数。监视系统还包括第三评估部分，用于确定平均Q因子参数和波形失真参数，并且通过将平均的Q-因子参数和波形失真参数进行比较来判断光信号质量劣化的主要因素是否是波形失真，因子参数和波形失真参数及其初始值或初始特性，当没有光信号质量下降时获得。

2. 发明授权

US06587242B1 Optical transmission system 失效
标题翻译：光传输系统
公开(公告)号：US06587242B1
公开(公告)日：2003-07-01
申请号：US09422726
申请日：1999-10-22
申请人： Ippei Shake , Hidehiko Takara , Yoshiaki Yamabayashi , Osamu Kamatani , Koji Nonaka , Kentaro Uchiyama
发明人： Ippei Shake , Hidehiko Takara , Yoshiaki Yamabayashi , Osamu Kamatani , Koji Nonaka , Kentaro Uchiyama
IPC分类号： H04J1408
CPC分类号： H04B10/25133 , H04B10/0775 , H04B2210/072 , H04B2210/078 , H04B2210/252 , H04B2210/258 , H04J14/08
摘要： It is the object of the present invention to provide a transmission system that transmits a control signal corresponding to the overhead accommodating time division multiplexing information at a frequency that is the same (or nearly the same) as that of the main signal. In order to attain this object, an optical transmitter broadens in a time range the optical waveform of the OTDM signal having a wavelength &lgr;0 and the control light having a wavelength &lgr;1(≈&lgr;0), and multiplexes the signal light having an optical peak intensity set low compared to the OTDM signal peak intensity and sending this to an optical transmission fiber. An optical receiver provides a light splitting means that splits into two parts the transmitted OTDM signal and the control light and outputs one part thereof to an optical time division multiplexing means, and at the same time restores the control light included in the other part of the light to the original optical pulse train, and extracts the control information by converting this to an electric signal.
摘要翻译：本发明的目的是提供一种传输系统，其以与主信号相同（或接近相同）的频率发送对应于开销容纳时分复用信息的控制信号。为了实现该目的，光发射机在时间范围内扩大了具有波长lambd0的OTDM信号的光波形和具有波长lambd1（≈lambd0）的控制光，并且复用具有光峰值强度集合的信号光与OTDM信号峰值强度相比较低，并将其发送到光传输光纤。光接收器提供一种分光装置，其将发射的OTDM信号和控制光分成两部分，并将其一部分输出到光时分多路复用装置，并且同时恢复包含在其中的控制光对原始光脉冲序列进行光照射，并通过将其转换为电信号来提取控制信息。

3. 发明授权

US06697395B2 Sum frequency light generation method and sum frequency light generation apparatus adapatble for wide-band wavelength conversion 有权
标题翻译：求和频率光产生方法和和频光发生装置适用于宽带波长转换
公开(公告)号：US06697395B2
公开(公告)日：2004-02-24
申请号：US10096037
申请日：2002-03-12
申请人： Akihito Otani , Toshinobu Otsubo , Hidehiko Takara , Ippei Shake , Satoki Kawanishi
发明人： Akihito Otani , Toshinobu Otsubo , Hidehiko Takara , Ippei Shake , Satoki Kawanishi
IPC分类号： H01S310
CPC分类号： G02F1/3534 , G02F1/3544 , G02F2203/07
摘要： A nonlinear optical crystal allowing type 2 phase matching multiplexes a fixed wavelength light having an angular frequency &ohgr;D and a variable wavelength light having an angular frequency &ohgr;S, with the polarization directions thereof being perpendicular to each other, so as to produce a sum frequency light having an angular frequency &ohgr;D+&ohgr;S. When multiplexing the fixed wavelength light and the variable wavelength light through the nonlinear optical crystal, a controlling section controls the polarization direction of the fixed wavelength light so as to be parallel to a predetermined reference axis within a plane vertical to a phase matching direction of the nonlinear optical crystal. Even when the wavelength of inputted light is changed, the predetermined reference axis is a single axis which maintains parallelism with the crystal axis of the nonlinear optical crystal.
摘要翻译：允许2型相位匹配的非线性光学晶体复用具有角频率ωD的固定波长光和具有角频率ωs的可变波长光，其偏振方向彼此垂直，以便产生具有角频率ω+ D +ω。当通过非线性光学晶体复用固定波长光和可变波长光时，控制部分将固定波长的光的偏振方向控制在垂直于垂直于相位匹配方向的平面内的预定基准轴上非线性光学晶体。即使输入光的波长发生变化，规定的基准轴也是与非线性光学晶体的晶轴平行的单轴。

4. 发明授权

US07684697B2 Optical signal quality monitoring circuit and optical signal quality monitoring method 有权
标题翻译：光信号质量监控电路和光信号质量监控方法
公开(公告)号：US07684697B2
公开(公告)日：2010-03-23
申请号：US10585532
申请日：2005-06-03
申请人： Ippei Shake , Hidehiko Takara , Atsushi Taniguchi
发明人： Ippei Shake , Hidehiko Takara , Atsushi Taniguchi
IPC分类号： H04B10/08
CPC分类号： H04L1/20 , H04B10/07953
摘要： The present invention provides an optical signal quality monitoring circuit and an optical signal quality monitoring method for measuring correct optical signal quality parameters when a signal bit rate is changed. The optical signal quality monitoring circuit which samples and converts an electrical signal converted from an optical signal with a given repeated frequency f1 to digital sampling data through an analog to digital conversion, thereafter, evaluates an optical signal quality parameter of the optical signal by subjecting sampling data to electrical signal processing in an integrated circuit in which a signal processing function is programmed, receives a control signal notifying that the bit rate of the optical signal is changed, or detects that the bit rate of the optical signal is changed to correct optical the signal quality parameter of the optical signal corresponding to the signal bit rate of the optical signal which is changed.
摘要翻译：本发明提供一种光信号质量监测电路和光信号质量监测方法，用于在信号比特率改变时测量正确的光信号质量参数。光信号质量监测电路对从具有给定重复频率f1的光信号转换成的电信号通过模数转换进行数字采样数据进行采样和转换，此后通过对采样信号进行采样来评估光信号的光信号质量参数在其中对信号处理功能进行编程的集成电路中的电信号处理的数据接收通知光信号的比特率改变的控制信号，或者检测到光信号的比特率被改变以校正光信号对应于改变的光信号的信号比特率的光信号的信号质量参数。

5. 发明申请

US20080285970A1 Optical Signal Quality Monitoring Circuit and Optical Signal Quality Monitoring Method 有权
标题翻译：光信号质量监测电路和光信号质量监测方法
公开(公告)号：US20080285970A1
公开(公告)日：2008-11-20
申请号：US10585532
申请日：2005-06-03
申请人： Ippei Shake , Hidehiko Takara , Atsushi Taniguchi
发明人： Ippei Shake , Hidehiko Takara , Atsushi Taniguchi
IPC分类号： H04B10/08 , H04B10/00 , H04B17/00
CPC分类号： H04L1/20 , H04B10/07953
摘要： The present invention provides an optical signal quality monitoring circuit and an optical signal quality monitoring method for measuring correct optical signal quality parameters when a signal bit rate is changed. The optical signal quality monitoring circuit which samples and converts an electrical signal converted from an optical signal with a given repeated frequency f1 to digital sampling data through an analog to digital conversion, thereafter, evaluates an optical signal quality parameter of the optical signal by subjecting sampling data to electrical signal processing in an integrated circuit in which a signal processing function is programmed, receives a control signal notifying that the bit rate of the optical signal is changed, or detects that the bit rate of the optical signal is changed to correct optical the signal quality parameter of the optical signal corresponding to the signal bit rate of the optical signal which is changed.
摘要翻译：本发明提供一种光信号质量监测电路和光信号质量监测方法，用于在信号比特率改变时测量正确的光信号质量参数。此后，光信号质量监测电路通过模/数转换将具有给定重复频率f 1的光信号转换的电信号进行采样和转换为数字采样数据，此后评估光信号质量通过对其中对信号处理功能进行编程的集成电路中的采样数据进行电信号处理的光信号的参数，接收通知光信号的比特率改变的控制信号，或者检测到光信号被改变以校正对应于改变的光信号的信号比特率的光信号的信号质量参数。

6. 发明授权

US07079765B2 Optical wavelength division multiplex signal monitoring apparatus 有权
公开(公告)号：US07079765B2
公开(公告)日：2006-07-18
申请号：US10091575
申请日：2002-03-07
申请人： Ippei Shake , Hidehiko Takara
发明人： Ippei Shake , Hidehiko Takara
IPC分类号： H04B10/08 , H04B17/00
CPC分类号： H04J14/02 , H04B10/07953 , H04L7/0075
摘要： An optical signal quality degradation monitoring apparatus for monitoring an optical wavelength division multiplex signal is implemented in a small size. To monitor the optical signal quality degradation in the optical wavelength division multiplex signal by a configuration as simple as possible, the following configurations are used: A configuration using an optical wavelength division demultiplexer and a sampling clock generator to make one an electric signal processor; A configuration using an optical sampling pulse train generator, an optical multiplexer, a nonlinear optical medium, and an optical wavelength division demultiplexer to make one an electric signal processor; or a configuration using a selection wavelength control section, an optical wavelength selecting section, and a sampling clock generator to make one electric signal.

7. 发明授权

US06720548B2 Optical sampling waveform measuring apparatus aiming at achieving wider band 有权
标题翻译：光采样波形测量装置旨在实现更宽的频带
公开(公告)号：US06720548B2
公开(公告)日：2004-04-13
申请号：US10095982
申请日：2002-03-12
申请人： Akihito Otani , Toshinobu Otsubo , Hidehiko Takara , Ippei Shake , Satoki Kawanishi
发明人： Akihito Otani , Toshinobu Otsubo , Hidehiko Takara , Ippei Shake , Satoki Kawanishi
IPC分类号： G02F101
CPC分类号： G01J11/00 , G02F1/3534
摘要： A nonlinear optical crystal is composed of 2-adamantyl-5-nitorpyridine (AANP) allowing the type 2 phase matching to the sampling light and a measuring object light, emitting a sum frequency light of the measuring object light and the sampling light, with the polarization directions thereof being perpendicular to each other, when the sampling light and measuring object light multiplexed by a multiplexer are entered. When the sum frequency light is emitted through the nonlinear optical crystal, a control portion controls the polarization direction of the sampling light so as to be parallel to a predetermined reference axis located within a plane perpendicular to a phase matching direction of the nonlinear optical crystal. The predetermined reference axis is a single axis maintaining parallelism with the crystal axis of the nonlinear optical crystal even if the wavelength of the inputted light is changed.
摘要翻译：非线性光学晶体由允许与采样光进行2相匹配的2-金刚烷基-5-硝基吡啶（AANP）和测量对象光组成，发射测量对象光和采样光的和频光，与当由多路复用器复用的采样光和测量对象光进入时，其极化方向彼此垂直。当通过非线性光学晶体发射和频光时，控制部分将采样光的偏振方向控制成与位于垂直于非线性光学晶体的相位匹配方向的平面内的预定参考轴平行。即使输入光的波长发生变化，预定的基准轴也是与非线性光学晶体的晶轴保持平行的单轴。

8. 发明授权

US07190752B2 Data signal quality evaluation method and apparatus using high speed sampling 有权
标题翻译：数据信号质量评估方法和装置采用高速采样
公开(公告)号：US07190752B2
公开(公告)日：2007-03-13
申请号：US10434840
申请日：2003-05-09
申请人： Ippei Shake , Hidehiko Takara
发明人： Ippei Shake , Hidehiko Takara
IPC分类号： H04L7/00
CPC分类号： H04L1/24 , H04B10/07953
摘要： The scale and complexity of an apparatus is reduced by omitting a clock extraction section. The apparatus includes: a sampling pulse train generation device which generates an optical or electrical sampling pulse train, independently of an input optical or electrical data signal with a bit rate f0(bit/s), and which has a repetition frequency f1(Hz); a data signal sampling device which samples the data signal in accordance with the sampling pulse train to obtain a sampled signal; a voltage retaining device which converts the sampled signal, and stores pieces of electrical digital data; an electrical signal processing device which reads the digital data at once or sequentially to obtain a signal eye-diagram and evaluates optical data signal quality parameters; and a trigger signal generation device which applies triggers indicating the start/finish of data acquisition and data read to the voltage retaining device and the electrical signal processing device, respectively.
摘要翻译：通过省略时钟提取部分减少了装置的规模和复杂性。该装置包括：采样脉冲串产生装置，其独立于具有位速率f 0（bit / s）的输入光学或电气数据信号产生光学或电采样脉冲串，以及哪个具有重复频率f 1（Hz）; 数据信号采样装置，其根据采样脉冲串对数据信号进行采样以获得采样信号; 电压保持装置，其转换采样信号，并存储电子数字数据; 电信号处理装置，其一次或顺序读取数字数据以获得信号眼图，并评估光数据信号质量参数; 触发信号生成装置，分别对电压保持装置和电信号处理装置施加指示数据采集和数据读取的开始/结束的触发信号。

9. 发明授权

US06842565B2 Optical modulation/multiplexing circuit 失效
标题翻译：光调制/复用电路
公开(公告)号：US06842565B2
公开(公告)日：2005-01-11
申请号：US10437586
申请日：2003-05-14
申请人： Takuya Ohara , Hidehiko Takara , Ippei Shake , Satoki Kawanishi
发明人： Takuya Ohara , Hidehiko Takara , Ippei Shake , Satoki Kawanishi
IPC分类号： G02F1/39 , G02F1/377 , H04J14/08 , H04L7/00 , G02B6/28
CPC分类号： H04J14/08 , H04L7/0075
摘要： An optical modulation/multiplexing circuit can fabricate a plurality of nonlinear optical waveguide devices and silica optical waveguides through a small number of processes, and achieve the simplification of the fabrication process and stabilization of the operation by hybrid integration with reduced connection loss. It employs lithium niobate domain inversion optical waveguides as nonlinear optical switches, and implements functions necessary for modulation and multiplexing such as input, splitting, multiplexing and timing adjustment of optical modulation signals and an optical clock signal by connecting glass waveguides to the input and output terminals of the domain inversion optical waveguides. Nonlinear optical media generate a second harmonic light beam of the optical clock signal, and at the same time produces a light beam with a frequency corresponding to the difference frequency of the two high frequency signals, the second harmonic light beam and the signal pulses.
摘要翻译：光调制/复用电路可以通过少量工艺制造多个非线性光波导器件和二氧化硅光波导，并通过混合集成实现简化制造工艺和稳定操作，减少连接损耗。它采用铌酸铌畴反射光波导作为非线性光开关，通过将玻璃波导连接到输入和输出端，实现调制和复用所必需的功能，如光调制信号的输入，分离，复用和时序调整以及光时钟信号的域反转光波导。非线性光学介质产生光时钟信号的二次谐波光束，并且同时产生具有对应于两个高频信号，二次谐波光束和信号脉冲的差频的频率的光束。

10. 发明授权

US06396601B1 System for monitoring quality of optical signals having different bit rates 有权
标题翻译：用于监视具有不同比特率的光信号质量的系统
公开(公告)号：US06396601B1
公开(公告)日：2002-05-28
申请号：US09204001
申请日：1998-12-01
申请人： Hidehiko Takara , Yoshiaki Yamabayashi , Ippei Shake
发明人： Hidehiko Takara , Yoshiaki Yamabayashi , Ippei Shake
IPC分类号： H04B1008
CPC分类号： H04B10/07953
摘要： An optical signal quality monitoring system is provided, by which the quality of optical signals can be examined using a single monitoring system, not depending on the bit rate of each signal. In the system, an optical signal having a bit rate N·f0, that is, N times as much as basic clock frequency f0, is sampled by using a pulse repetition frequency f0/n1−&Dgr;f or f0/n1+&Dgr;f where n1 is a predetermined natural number and the pulse repetition frequency slightly differs from f0/n1 by &Dgr;f, and an amplitude histogram of the optical signal is determined based on results of the sampling. Regarding the sampling points which constitute the histogram, a set of higher-level points and a set of lower-level points are extracted and a ratio of a difference between an average level of the set of higher-level points within a predetermined period and an average level of the set of lower-level points within a predetermined period, to the sum of standard deviations of both sets within each predetermined period is calculated as a coefficient of the S/N, and the quality of the optical signal is examined based on the coefficient. By performing optical sampling, quality of optical signals having bit rates of a few dozen Gbit/s or more can be monitored.
摘要翻译：提供了一种光信号质量监测系统，通过该光信号质量监测系统，可以使用单个监控系统检查光信号的质量，而不依赖于每个信号的比特率。在该系统中，通过使用脉冲重复频率f0 / n1-DELTAf或f0 / n1 + DELTAf对具有比特率N.f0，即基本时钟频率f0的N倍的光信号进行采样，其中n1是预定的自然数，脉冲重复频率与f0 / n1与DELTAf略有不同，根据采样结果确定光信号的振幅直方图。关于构成直方图的采样点，提取一组较高级别点和一组较低级别点，并且在预定时间段内的上一级点的平均电平和将预定时间段内的下一级集合的平均电平相对于每个预定周期内的两组的标准偏差之和计算为S / N的系数，并且基于系数。通过进行光采样，可以监视具有几十Gbit / s以上的比特率的光信号的质量。

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