公开(公告)号：US07024122B2

公开(公告)日：2006-04-04

申请号：US10285525

申请日：2002-11-01

申请人： Kentaro Uchiyama ,  Hidehiko Takara ,  Eiichi Yamada ,  Etsu Hashimoto ,  Toshio Morioka

发明人： Kentaro Uchiyama ,  Hidehiko Takara ,  Eiichi Yamada ,  Etsu Hashimoto ,  Toshio Morioka

IPC分类号： H04B10/00

CPC分类号： H03L7/18 ,  H03L7/08 ,  H03L2207/10 ,  H04J14/02 ,  H04L7/0075 ,  H04L7/033 ,  H04L29/12018 ,  H04L29/12207 ,  H04L61/10 ,  H04L61/20

摘要： In an ultrahigh-speed clock extraction circuit wherein a local pulse generating light source 22 for generating a local optical pulse stream synchronized in bit phase with an input optical signal pulse stream is placed in a phase-locked loop, when repetition frequencies of the input optical signal pulse stream and the local optical pulse stream bear a particular relationship, a frequency demultiplier 32 and multipliers 43 and 52 are set so that the frequency of a modulation signal for an optical modulator 41 and a frequency which is a natural-number multiple of the modulation signal frequency, and the frequency of a down-converted version of an optical pulse stream output from a photodetector 42 differ from each other.

公开(公告)号：US6023360A

公开(公告)日：2000-02-08

申请号：US892474

申请日：1997-07-14

申请人： Toshio Morioka ,  Hidehiko Takara ,  Masatoshi Saruwatari

发明人： Toshio Morioka ,  Hidehiko Takara ,  Masatoshi Saruwatari

IPC分类号： G02F1/35 ,  H04J14/02 ,  H04J14/08 ,  H04Q11/00

CPC分类号： H04Q11/0005 ,  H04J14/0223 ,  H04J14/08 ,  H04Q11/0003 ,  G02F1/3519 ,  G02F1/3536 ,  H04Q2011/0009 ,  H04Q2011/0011 ,  H04Q2011/0013 ,  H04Q2011/0015 ,  H04Q2011/002 ,  H04Q2011/0022 ,  H04Q2011/0026 ,  H04Q2011/0033 ,  H04Q2011/0035 ,  H04Q2011/0041

摘要： A multiple-channel all-optical TDM-WDM converter and multiple-channel all-optical TDM demultiplexer which is able to simultaneously and spatially separate optical signal pulse trains of each channel from a TDM optical signal pulse train is structured without using a multistage-structure constitution. A control optical source 10 generates a control optical pulse train containing N optical frequencies, which is synchronous with optical signal pulse trains of N channels which are to be divided from a TDM optical signal pulse train wherein optical signal pulse trains of N channels have been multiplexed in time series. An optical wavelength multiplexer 11 combines the time-division-multiplexed optical signal pulse train and the control optical pulse train. The light output from an optical wavelength multiplexer 11 is input to a nonlinear material 12, which induces a four-wave mixing effect between the control optical pulse stream having the N optical frequencies and optical signal pulse trains of N channels, and outputs a frequency-converted optical pulse train which is the combination of N optical pulse trains having different optical frequencies. An optical wavelength demultiplexer 13 spatially divides the N types of optical pulse trains according to each optical frequency from the frequency-converted optical pulse train.

摘要翻译： 能够同时和空间上分离每个信道的光信号脉冲串与TDM光信号脉冲串的多通道全光TDM-WDM转换器和多通道全光TDM解复用器，而不使用多级结构 宪法。 控制光源10产生包含N个光频的控制光脉冲串，其与从N G信道的光信号脉冲串已复用的TDM光信号脉冲串划分的N个信道的光信号脉冲串同步 在时间序列。 光波长多路复用器11组合时分多路复用光信号脉冲串和控制光脉冲串。 从光学波长多路复用器11输出的光被输入到非线性材料12，其引起具有N个光学频率的控制光脉冲流和N个通道的光信号脉冲串之间的四波混频效应， 作为具有不同光频率的N个光脉冲串的组合的转换光脉冲串。 光波长解复用器13根据每个光学频率根据频率转换的光脉冲列空间地划分N种类型的光脉冲串。

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。

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。

公开(公告)号：US09065243B2

公开(公告)日：2015-06-23

申请号：US13980756

申请日：2012-01-20

申请人： Masaki Asobe ,  Takeshi Umeki ,  Kouji Enbutsu ,  Akio Tokura ,  Yutaka Miyamoto ,  Hidehiko Takara ,  Hirokazu Takenouchi ,  Isao Tomita

发明人： Masaki Asobe ,  Takeshi Umeki ,  Kouji Enbutsu ,  Akio Tokura ,  Yutaka Miyamoto ,  Hidehiko Takara ,  Hirokazu Takenouchi ,  Isao Tomita

IPC分类号： H01S3/067 ,  G02F1/39 ,  G02F1/35 ,  H01S3/00 ,  H01S3/108 ,  G02F1/37 ,  H01S3/23

CPC分类号： H01S3/06754 ,  G02F1/3532 ,  G02F1/3534 ,  G02F1/3536 ,  G02F1/3544 ,  G02F1/37 ,  G02F1/39 ,  G02F2001/392 ,  H01S3/0092 ,  H01S3/1083 ,  H01S3/2391

摘要： The phase sensitive amplifier according to the present invention is a phase sensitive amplifier that uses the optical mixing using a nonlinear optical effect to amplify the signal light. The phase sensitive amplifier according to the present invention includes: the first second-order nonlinear optical element; and the second second-order nonlinear optical element. The first second-order nonlinear optical element causes the fundamental wave light to generate second harmonic light used as pump light and separates only the second harmonic light. The second second-order nonlinear optical element includes a multiplexer to multiplex the signal light with the second harmonic light and spectrally separates only the amplified signal light. The multiplexed signal light and second harmonic light are used subjected to parametric amplification.

摘要翻译： 根据本发明的相位敏感放大器是使用非线性光学效应的光学混合放大信号光的相位敏感放大器。 根据本发明的相位敏感放大器包括：第一二阶非线性光学元件; 和第二二阶非线性光学元件。 第一二阶非线性光学元件使得基波光产生用作泵浦光的二次谐波，并且仅分离二次谐波光。 第二二阶非线性光学元件包括多路复用器，用于将信号光与第二谐波光进行多路复用，并且仅对放大的信号光进行光谱分离。 复用的信号光和二次谐波光被使用进行参数放大。

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。

公开(公告)号：US5999548A

公开(公告)日：1999-12-07

申请号：US98323

申请日：1998-06-16

申请人： Kunihiko Mori ,  Hidehiko Takara ,  Satoki Kawanishi ,  Masatoshi Saruwatari

发明人： Kunihiko Mori ,  Hidehiko Takara ,  Satoki Kawanishi ,  Masatoshi Saruwatari

IPC分类号： G02F1/365 ,  H01S3/10

CPC分类号： G02F1/365 ,  G02F2001/3528 ,  H01S3/0078 ,  H01S3/1305 ,  Y10S372/703

摘要： The present invention relates to a white pulse source that produces spectrally shaped white pulses of a constant optical output power over a wide wavelength range. The white pulse source includes a pump pulse source for generating pump pulses with a center wavelength .lambda.0 and a waveguided nonlinear optical medium with a length L. The waveguided nonlinear optical medium is characterized by two properties: the first property is that chromatic dispersion D(.lambda.0,z) at the center wavelength of pump pulses in ps/nm/km is positive at an input end of said waveguided nonlinear optical medium, where z=0, and decreases towards an output end. The second property is that said chromatic dispersion D(.lambda., z) has a maximum value D(.lambda.p(z), z) at a peak wavelength .lambda.p(z) within a range of propagation distance given by L1.ltoreq.z.ltoreq.L where 0.ltoreq.L1

摘要翻译： 白色脉冲源技术领域本发明涉及在宽波长范围内产生恒定光输出功率的光谱形白脉冲的白脉冲源。 白色脉冲源包括用于产生具有中心波长λ0的泵浦脉冲的泵浦脉冲源和具有长度L的波导非线性光学介质。波导非线性光学介质的特征在于两个性质：第一特性是色散D（ 在所述波导非线性光学介质的输入端，在ps / nm / km的泵浦脉冲的中心波长处的λ0，z z为正，其中z = 0，并且朝向输出端减小。 第二个特征是所述色散D（λ，z）在由L1

公开(公告)号：US5590143A

公开(公告)日：1996-12-31

申请号：US398177

申请日：1995-03-02

申请人： Hidehiko Takara ,  Satoki Kawanishi ,  Masatoshi Saruwatari

发明人： Hidehiko Takara ,  Satoki Kawanishi ,  Masatoshi Saruwatari

IPC分类号： H01S3/083 ,  H01S3/098 ,  H01S3/107 ,  H01S3/10

CPC分类号： H01S3/1109 ,  H01S3/107 ,  H01S3/083 ,  H01S3/2383

摘要： A multiple-frequency-modulation mode-locked laser device which generates high-speed optical pulse trains and can be used as a high-speed optical pulse source in the fields of optical communications and optical measurement is presented, wherein the repetition frequency F.sub.rep and the pulse width .DELTA.t are able to be controlled independently with only the laser itself.A drive signal generation means is provided which generates a frequency-mixed drive signal mixed from at least two different frequencies f.sub.1 (=N.sub.1 f.sub.r), f.sub.2 (=N.sub.2 f.sub.r), . . . , which are integral multiples of the frequency spacing f.sub.r (=c/R) of the longitudinal modes of either a ring cavity or a Fabry-Perot cavity. This frequency-mixed drive signal is supplied to an optical modulation means of the cavity.

摘要翻译： 提出了一种生成高速光脉冲串并可用作光通信和光学测量领域的高速光脉冲源的多频调制锁模激光装置，其中重复频率Frep和 脉冲宽度DELTA t只能用激光本身独立控制。 提供了一种驱动信号产生装置，其产生从至少两个不同频率f1（= N1fr），f2（= N2fr）混合的频率混合驱动信号。 。 。 ，它们是环腔或法布里 - 珀罗腔的纵向模式的频率间隔fr（= c / R）的整数倍。 该频率混合驱动信号被提供给空腔的光调制装置。

公开(公告)号：US08964581B2

公开(公告)日：2015-02-24

申请号：US13395747

申请日：2010-09-13

申请人： Hidehiko Takara ,  Masahiko Jinno ,  Atsushi Watanabe ,  Kozicki Bartlomiej ,  Yoshiaki Sone ,  Akira Hirano ,  Takafumi Tanaka

发明人： Hidehiko Takara ,  Masahiko Jinno ,  Atsushi Watanabe ,  Kozicki Bartlomiej ,  Yoshiaki Sone ,  Akira Hirano ,  Takafumi Tanaka

IPC分类号： H04B10/079 ,  H04L12/42 ,  H04J14/02 ,  H04L12/437

CPC分类号： H04L12/42 ,  H04B10/0793 ,  H04B10/07953 ,  H04J14/02 ,  H04J14/0204 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0217 ,  H04J14/0221 ,  H04J14/0224 ,  H04J14/0254 ,  H04J14/0257 ,  H04J14/026 ,  H04J14/0267 ,  H04J14/0268 ,  H04J14/0269 ,  H04J14/0295 ,  H04L12/437

摘要： A bandwidth variable communication method is provided that enables effective use of frequency bandwidths in which the bit rate is constant in every optical path. The bandwidth variable communication method includes, when a network management apparatus sets or changes an optical path that passes through plural communication apparatuses, measuring or obtaining an optical signal quality deterioration amount in a route of the optical path; selecting a modulation format in which a spectrum bandwidth is the narrowest from among modulation formats by which transmission is available on conditions of the optical signal quality deterioration amount and a desired bit rate B (bit/s); and exchanging control information between the network management apparatus and a control unit of each communication apparatus on the optical path route. A bandwidth variable communication apparatus receives the control information, and changes a passband based on the received control information.

摘要翻译： 提供了一种带宽可变通信方法，其能够有效地使用其中每个光路中的比特率是恒定的频率带宽。 带宽可变通信方法包括：当网络管理装置设置或改变通过多个通信装置的光路时，测量或获得光路中的光信号质量恶化量; 在光信号质量恶化量和期望比特率B（比特/秒）的条件下，从调制格式中选择其中频谱带宽最窄的调制格式。 并且在光路径上的网络管理装置与各通信装置的控制单元之间交换控制信息。 带宽可变通信装置接收控制信息，并根据接收到的控制信息改变通带。

公开(公告)号：US20140270776A1

公开(公告)日：2014-09-18

申请号：US14009264

申请日：2012-04-26

申请人： Masahiko Jinno ,  Hidehiko Takara ,  Kazushige Yonenaga ,  Akira Hirano ,  Yoshiaki Sone

发明人： Masahiko Jinno ,  Hidehiko Takara ,  Kazushige Yonenaga ,  Akira Hirano ,  Yoshiaki Sone

IPC分类号： H04J14/02 ,  H04Q11/00

CPC分类号： H04J14/0238 ,  H04J14/0204 ,  H04J14/0209 ,  H04J14/0212 ,  H04J14/0213 ,  H04J14/0217 ,  H04L27/2697 ,  H04Q11/0067 ,  H04Q2011/0086

摘要： An optical communication apparatus, in the sending side, distributes client signals according to destinations and a communication capacity of each destination, electrical-to-optical converts the distributed signals to optical signals having different center frequencies, and multiplexes the optical signals to output, and in the receiving side, the optical communication apparatus divides the wavelength division multiplexed signal to each wavelength (for each sending source), optical-to-electrical converts the divided optical signals to electrical signals, and multiplexes the electrical signals to output. An add/drop port of an optical route switching apparatus includes an input/output port to the optical communication apparatus, and an optical frequency bandwidth is variable according to an optical spectrum width of the optical signal. A network is constructed by using the optical communication apparatus and the optical route switching apparatus.

摘要翻译： 发送侧的光通信装置根据目的地和每个目的地的通信容量分配客户端信号，将分布式信号进行电光转换为具有不同中心频率的光信号，并将光信号复用输出，以及 在接收侧，光通信装置将波分多路复用信号划分为每个波长（对于每个发送源），光对电转换成电信号，并将电信号多路复用为输出。 光路由交换装置的分插口包括到光通信装置的输入/输出端口，并且光频带宽根据光信号的光谱宽度是可变的。 通过使用光通信装置和光路转换装置构成网络。