公开(公告)号：US07860408B2

公开(公告)日：2010-12-28

申请号：US11651591

申请日：2007-01-10

申请人： Akihiko Isomura ,  Jens Rasmussen ,  Takafumi Terahara ,  Kentaro Nakamura ,  Takeshi Hoshida ,  George Ishikawa ,  Hiroshi Onaka ,  Morio Wada ,  Hiroyuki Matsuura ,  Akira Miura ,  Yasuyuki Suzuki ,  Hideaki Arai ,  Satoshi Takasugi

发明人： Akihiko Isomura ,  Jens Rasmussen ,  Takafumi Terahara ,  Kentaro Nakamura ,  Takeshi Hoshida ,  George Ishikawa ,  Hiroshi Onaka ,  Morio Wada ,  Hiroyuki Matsuura ,  Akira Miura ,  Yasuyuki Suzuki ,  Hideaki Arai ,  Satoshi Takasugi

IPC分类号： H04B10/06

CPC分类号： G02F1/225 ,  G02F2203/21 ,  H04L1/0047 ,  H04L27/223

摘要： An interferometer for demodulating a differential M-phase shift keying signal includes a PLC type interferometer main body, a heating portion that heats the PLC type interferometer main body, and an intermediate member having a higher stiffness than that of the PLC type interferometer main body, for bonding the PLC type interferometer main body and the heating portion with each other while being sandwiched therebetween. A linear expansion coefficient difference between the PLC type interferometer main body and the intermediate member is equal to or smaller than 4.5×10−6/° C., and a thermal conductivity difference between the PLC type interferometer main body and the intermediate member is equal to or larger than 10 W/mK. A phase of an optical signal flowing through the interferometer is adjusted by using the heating portion and a second heating portion.

摘要翻译： 用于解调差分M相移键控信号的干涉仪包括PLC型干涉仪主体，加热PLC型干涉仪主体的加热部分和具有比PLC型干涉仪主体更高刚度的中间部件， 用于将PLC型干涉仪主体和加热部分夹在两者之间彼此粘合。 PLC型干涉仪主体与中间构件之间的线膨胀系数差等于或小于4.5×10-6 /℃，PLC型干涉仪主体与中间构件之间的热导率差相等 至10W / mK以上。 通过使用加热部和第二加热部来调节流过干涉仪的光信号的相位。

公开(公告)号：US07848659B2

公开(公告)日：2010-12-07

申请号：US11298892

申请日：2005-12-12

申请人： Akira Miura ,  Kentaro Nakamura ,  Hiroshi Onaka ,  Yuichi Akiyama ,  Hiroki Ooi ,  Jens Rasmussen ,  Takeshi Hoshida

发明人： Akira Miura ,  Kentaro Nakamura ,  Hiroshi Onaka ,  Yuichi Akiyama ,  Hiroki Ooi ,  Jens Rasmussen ,  Takeshi Hoshida

IPC分类号： H04B10/04

CPC分类号： G02F1/0123 ,  G02F1/2255 ,  H04B10/505 ,  H04B10/5051 ,  H04B10/5053 ,  H04B10/50575 ,  H04B10/50577 ,  H04B10/50597 ,  H04B10/58

摘要： A data modulator unit generates a DQPSK optical signal in accordance with a data signal. A phase shift unit provides a phase difference of π/2 between a pair of arms. A photodetector converts an output signal of the data modulator unit into an electrical signal. A filter is a low-pass filter with a cut-off frequency lower than a symbol frequency, and filters an output signal of the photodetector. A monitor unit detects power of an output signal of the filter. A phase difference control unit adjusts the amount of phase shift in the phase shift unit so as to minimize power of an output signal of the filter.

摘要翻译： 数据调制器单元根据数据信号产生DQPSK光信号。 相移单元在一对臂之间提供＆pgr / / 2的相位差。 光电检测器将数据调制器单元的输出信号转换为电信号。 滤波器是具有低于符号频率的截止频率的低通滤波器，并对光电检测器的输出信号进行滤波。 监视器单元检测滤波器的输出信号的功率。 相位差控制单元调整相移单元中的相移量，以使滤波器的输出信号的功率最小化。

公开(公告)号：US07822204B2

公开(公告)日：2010-10-26

申请号：US11525164

申请日：2006-09-22

申请人： Setsuo Yoshida ,  Osamu Hirota ,  Hiroshi Onaka

发明人： Setsuo Yoshida ,  Osamu Hirota ,  Hiroshi Onaka

IPC分类号： H04K1/00 ,  H04L9/00 ,  H04L9/28

CPC分类号： H04L1/0045 ,  H04L9/0662 ,  H04L9/0852 ,  H04L9/12 ,  H04L25/4917 ,  H04L2209/127

摘要： An encryption technique allowing use of classic Y-00 scheme performed using classic physical random numbers instead of quantum fluctuation in electrical communication and data storage in recording media, including a first modulation step for multilevel-modulating input data by associating with specific state pairs determined by physical random numbers, a second modulation step for outputting the output of the first step by irregularly associating with another signal by physical random numbers, and a channel coding step for channel-coding the output of the second step into desired codeword and outputting it as encrypted data, wherein the decoded signal obtained by channel-decoding the encrypted data can be discriminated which of specific state pairs the signal corresponds to and demodulated into the input data, and output by the first modulation by state pairs other than the specific state pairs and the second modulation by a physical random number different from the physical random number.

摘要翻译： 一种加密技术，允许使用经典的物理随机数而不是记录介质中的电气通信和数据存储中的量子波动执行的经典的Y-00方案，包括通过与通过与特定的状态对相关联的多电平调制输入数据的第一调制步骤 物理随机数，第二调制步骤，用于通过与物理随机数不同地与另一个信号相关联地输出第一步骤的输出;以及信道编码步骤，用于对第二步骤的输出进行信道编码为期望的码字，并将其输出为加密的 数据，其中通过对加密数据进行通道解码而获得的解码信号可以鉴别信号对应于哪个特定状态对并被解调成输入数据，并且通过除特定状态对之外的状态对通过第一调制输出， 通过与物理随机数不同的物理随机数进行二次调制 呃

公开(公告)号：US07769299B2

公开(公告)日：2010-08-03

申请号：US11475046

申请日：2006-06-27

申请人： Hiroki Ooi ,  Akira Miura ,  Hiroshi Onaka

发明人： Hiroki Ooi ,  Akira Miura ,  Hiroshi Onaka

IPC分类号： H04B10/12 ,  H04B10/00

CPC分类号： G01M11/333 ,  G01M11/338 ,  H04B10/07951 ,  H04B10/2513

摘要： A chromatic dispersion monitoring apparatus according to the present invention comprises: a photodetector which photo-electrically converts an optical signal; a low-pass filter which limits a frequency bandwidth of the photo-electrically converted electrical signal to be within a range set according to a modulation format of the optical signal and a bit rate thereof; a DC elimination circuit which eliminates a direct current component of the bandwidth limited electrical signal; and a power detector which detects the power of the bandwidth limited electrical signal to detect the residual dispersion of the optical signal. As a result, it becomes possible to easily realize the chromatic dispersion monitoring apparatus of low cost, which is also capable to be arranged on an in-line.

摘要翻译： 根据本发明的色散监视装置包括：光电转换光信号的光电检测器; 将光电转换电信号的频带宽度限制在根据光信号的调制格式及其比特率设定的范围内的低通滤波器; DC消除电路，其消除带宽受限电信号的直流分量; 以及功率检测器，其检测带宽受限电信号的功率，以检测光信号的残余色散。 结果，可以容易地实现也能够排列在一起的低成本的色散监视装置。

公开(公告)号：US20090136229A1

公开(公告)日：2009-05-28

申请号：US12359406

申请日：2009-01-26

申请人： Takeshi Hoshida ,  Hiroshi Onaka ,  Takafumi Terahara

发明人： Takeshi Hoshida ,  Hiroshi Onaka ,  Takafumi Terahara

IPC分类号： H04J14/00

CPC分类号： H04B10/2916 ,  H01S3/094011 ,  H01S3/302

摘要： A method and system for transmitting information in an optical communication system includes modulating a non-intensity characteristic of an optical carrier signal with a data signal to generate an optical information signal. The optical information signal is transmitted over an optical link. The optical information signal is amplified over a length of the optical link with a co-launched amplification signal traveling in the optical link in a same direction as the optical information signal.

摘要翻译： 用于在光通信系统中发送信息的方法和系统包括用数据信号调制光载波信号的非强度特性以产生光信息信号。 光信息信号通过光链路传输。 光信息信号在光链路的长度上以与光信息信号相同的方向在光链路中行进的共同放大信号放大。

公开(公告)号：US20060280510A1

公开(公告)日：2006-12-14

申请号：US11397690

申请日：2006-04-05

申请人： Hiroshi Onaka ,  Takeshi Hoshida

发明人： Hiroshi Onaka ,  Takeshi Hoshida

IPC分类号： H04B10/04

CPC分类号： H04L27/223 ,  H04B10/60 ,  H04L27/2331

摘要： An optical receiver comprises branching units for branching and supplying the signal lights to be inputted to the first to fourth optical waveguides provided on a substrate, second to third optical waveguides for giving delay time differences corresponding to a symbol of the DMPSK modulated signal, a demodulating unit for demodulating two light signals through interference of signal lights between the first to second optical waveguides and between the third to fourth optical waveguides, two optical detectors for converting two light signals from the demodulating unit, and a light path length varying unit for identically varying each light path length of two optical waveguides being arranged through selection of combinations of the first and third optical waveguides, the first and fourth optical waveguides, and the second and third optical waveguides in one region when the wavelength of the signal light is varied.

公开(公告)号：US20060024063A1

公开(公告)日：2006-02-02

申请号：US10998064

申请日：2004-11-29

申请人： Miki Onaka ,  Etsuko Hayashi ,  Hiroshi Onaka

发明人： Miki Onaka ,  Etsuko Hayashi ,  Hiroshi Onaka

IPC分类号： H04B10/12

CPC分类号： H04B10/2941 ,  H01S3/06754 ,  H01S3/1305 ,  H04B10/071 ,  H04B10/07955

摘要： An optical amplifier of the present invention comprises: an optical amplifying circuit which amplifies a signal light; an optical reflection medium which is disposed on an optical fiber connected to the optical amplifying circuit and is capable of reflecting a noise light which exists in a predetermined wavelength range outside a signal band, among noise lights generated in said optical amplifying circuit, to radiate the reflected noise light to the outside of a core of the optical fiber; a light receiver which receives the noise light reflected to be radiated to the outside of the core of the optical fiber by the optical reflection medium, to detect the power of the noise light; and a computation circuit which computes the total power of the noise lights generated in the optical amplifying circuit based on the detection result of the light receiver. Thus, it is possible to provide at a low cost an optical amplifier provided with a monitoring function capable of detecting high accurately, with a simple optical circuit configuration, the noise light power and the like generated when the signal light is amplified.

摘要翻译： 本发明的光放大器包括：放大信号光的光放大电路; 光反射介质，其设置在与光放大电路连接的光纤上，并且能够反射存在于信号频带外的预定波长范围内的噪声光，在所述光放大电路中产生的噪声光中， 将反射的噪声光反射到光纤的核心的外部; 光接收器，其通过光反射介质接收被辐射到光纤的芯的外部的噪声光，以检测噪声光的功率; 以及计算电路，其基于所述光接收器的检测结果来计算在所述光放大电路中产生的噪声光的总功率。 因此，可以以低成本提供具有能够以简单的光电路结构高精度检测的监视功能的光放大器，当信号光被放大时产生的噪声光功率等。

公开(公告)号：US20050169633A1

公开(公告)日：2005-08-04

申请号：US11082958

申请日：2005-03-18

申请人： Goji Nakagawa ,  Hideyuki Miyata ,  Yutaka Kai ,  Hiroshi Onaka ,  Setsuo Yoshida ,  Kyosuke Sone ,  Tomohiro Ueno

发明人： Goji Nakagawa ,  Hideyuki Miyata ,  Yutaka Kai ,  Hiroshi Onaka ,  Setsuo Yoshida ,  Kyosuke Sone ,  Tomohiro Ueno

IPC分类号： H04B10/27 ,  G02F1/125 ,  H01L31/12 ,  H01S5/0687 ,  H04B10/07 ,  H04B10/275 ,  H04B10/29 ,  H04J14/00 ,  H04J14/02

CPC分类号： H04B10/572 ,  H04J14/0204 ,  H04J14/0209 ,  H04J14/021 ,  H04J14/0213 ,  H04J14/022 ,  H04J14/0227

摘要： An optical transmission device improved in quality and reliability of OADM function and permitting configuration of highly-flexible, economical OADM networks. A wavelength tunable filter variably selects a wavelength according to a control frequency. A filter controller applies the control frequency to the filter while scanning wavelength over an entire signal bandwidth, to detect, from a reference wavelength monitor signal supplied thereto, a reference control frequency which permits the filter to select a reference wavelength and according to which wavelength is matched. On receiving a wavelength selection request, the controller obtains a target control frequency from the reference control frequency and the position of a target wavelength relative to the reference wavelength, and applies the obtained frequency to the filter. A reference wavelength filter transmits the reference wavelength therethrough. A light-receiving element monitors the transmitted reference wavelength to generate the monitor signal.

摘要翻译： 一种光传输设备改进了OADM功能的质量和可靠性，并允许配置高度灵活，经济的OADM网络。 波长可调滤波器根据控制频率可变地选择波长。 滤波器控制器在整个信号带宽上扫描波长时将滤波器的控制频率施加到滤波器，从提供给其的参考波长监测信号中检测出允许滤波器选择参考波长的参考控制频率，根据哪个波长是 匹配。 在接收到波长选择请求时，控制器从参考控制频率和目标波长相对于参考波长的位置获得目标控制频率，并将获得的频率应用于滤波器。 参考波长滤波器透过参考波长。 光接收元件监测发射的参考波长以产生监测信号。

公开(公告)号：US06782017B1

公开(公告)日：2004-08-24

申请号：US09560151

申请日：2000-04-28

申请人： Yutaka Kai ,  Hideyuki Miyata ,  Hiroshi Onaka

发明人： Yutaka Kai ,  Hideyuki Miyata ,  Hiroshi Onaka

IPC分类号： H01S313

CPC分类号： H04B10/572 ,  H01S5/0078 ,  H01S5/0687 ,  H04B10/506

摘要： An object of the invention is to provide a wavelength locker which has a wider locking range than that of the wavelength locker in the prior art and which can cope with a plurality of wavelengths. The aforementioned objects are achieved by a wavelength locker, which comprises a periodic filter, a detecting part for detecting the intensity of a laser beam through the periodic filter, and a controlling part for controlling the wavelength of the laser beam to a desired wavelength in accordance with the output of the detecting part. In this wavelength locker, the FSR of the periodical filter is controlled according to space between the wavelengths, and refers to the number of wavelength to be locked, so that the characteristics corresponding to output wavelengths that vary in every period twice the space of wavelengths and are complementary to each other, can be obtained, and the locking range will become wider.

摘要翻译： 本发明的目的是提供一种具有比现有技术中的波长锁定器更宽的锁定范围并且可以应付多个波长的波长锁定器。 上述目的通过一种波长锁定器实现，该波长锁定器包括周期滤波器，用于检测通过周期滤波器的激光束的强度的检测部分，以及用于将激光束的波长控制为所需波长的控制部分 与检测部分的输出。 在该波长锁定器中，周期滤波器的FSR根据波长之间的空间来控制，并且是指要锁定的波长的数量，使得对应于输出波长的特性在每个周期中变化是波长空间的两倍， 互补，可以获得，锁定范围将变宽。

公开(公告)号：US06717713B2

公开(公告)日：2004-04-06

申请号：US10411139

申请日：2003-04-11

申请人： Hiroshi Onaka ,  Nobuhiro Fukushima

发明人： Hiroshi Onaka ,  Nobuhiro Fukushima

IPC分类号： G02F109

CPC分类号： G02F1/09 ,  G02F1/093 ,  G02F2203/48

摘要： An apparatus which attenuates a light signal polarized in a first direction. The apparatus includes a polarization rotation unit and an output unit. The polarization rotation unit rotates the polarization of the light signal to produce a polarization rotated light signal having a polarization component in the first direction and a polarization component in a second direction which is substantially 90 degrees with respect to the first direction. The output unit passes, as an output signal, the polarization component in the second direction of the polarization rotated light signal and blocks the polarization component in the first direction. The polarization rotation unit includes an electromagnet and a permanent magnet which apply magnetic fields in specific directions with respect to the light path. Various yoke constructions are provided for the electromagnet and the permanent magnet. A control circuit maintains the output power of the output signal at a constant level, or maintains a constant ratio between the power level of the output signal and the power level of he light signal before the polarization is rotated. The apparatus can have a wavelength dependent attenuation which compensates for the wavelength dependent gain of an optical amplifier.

摘要翻译： 一种衰减在第一方向上偏振的光信号的装置。 该装置包括偏振旋转单元和输出单元。 偏振旋转单元旋转光信号的偏振，以产生具有第一方向的偏振分量和相对于第一方向基本上为90度的第二方向的偏振分量的偏振旋转光信号。 输出单元将偏振旋转光信号的第二方向上的偏振分量作为输出信号传递，并阻止第一方向的偏振分量。 偏振旋转单元包括在相对于光路在特定方向上施加磁场的电磁体和永磁体。 为电磁铁和永久磁铁提供各种轭结构。 控制电路将输出信号的输出功率维持在恒定水平，或者在偏振旋转之前保持输出信号的功率电平与光信号的功率电平之间的恒定比率。 该装置可以具有波长相关的衰减，其补偿光放大器的与波长相关的增益。