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：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：US20070053692A1

公开(公告)日：2007-03-08

申请号：US09853323

申请日：2001-05-10

申请人： Takeshi Hoshida ,  Hiroshi Onaka ,  Takafumi Terahara

发明人： Takeshi Hoshida ,  Hiroshi Onaka ,  Takafumi Terahara

IPC分类号： H04J14/02

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：US07483639B2

公开(公告)日：2009-01-27

申请号：US09853323

申请日：2001-05-10

申请人： Takeshi Hoshida ,  Hiroshi Onaka ,  Takafumi Terahara

发明人： Takeshi Hoshida ,  Hiroshi Onaka ,  Takafumi Terahara

IPC分类号： H04B10/00

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：US20070177151A1

公开(公告)日：2007-08-02

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 ,  Yasuyyki 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 ,  Yasuyyki Suzuki ,  Hideaki Arai ,  Satoshi Takasugi

IPC分类号： G01B9/02

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部件之间的线膨胀系数差等于或小于4.5×10 -6 /℃，PLC型干涉仪主体之间的热导率差 中间部件为10W / m·K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：US06654561B1

公开(公告)日：2003-11-25

申请号：US09699479

申请日：2000-10-31

申请人： Takafumi Terahara ,  Takeshi Sakamoto ,  Hiroaki Tomofuji ,  Motoyoshi Sekiya ,  Makoto Murakami ,  Kazuo Yamane ,  Hiroshi Onaka

发明人： Takafumi Terahara ,  Takeshi Sakamoto ,  Hiroaki Tomofuji ,  Motoyoshi Sekiya ,  Makoto Murakami ,  Kazuo Yamane ,  Hiroshi Onaka

IPC分类号： H04B1008

CPC分类号： H04B10/07953 ,  H04B10/0799

摘要： In a method of measuring an optical signal-to-noise ratio according to the present invention, a partial optical signal-to-noise ratio is defined, the partial optical signal-to-noise ratio is calculated from a predetermined physical quantity, the sum of inverse numbers of the partial optical signal-to-noise ratios is calculated, and further an inverse number of the sum is calculated to acquire an optical signal-to-noise ratio. The present invention makes it possible to measure optical SNR without directly measuring ASE in the optical signal. The present invention provides a measuring apparatus, a measuring circuit, a pre-emphasis method, an optical communication system, and a controlling apparatus each utilizing this method.

摘要翻译： 在根据本发明的测量光信噪比的方法中，定义部分光信噪比，从预定物理量计算部分光信噪比，总和 计算出部分光信噪比的逆数，并且进一步计算和的逆数以获得光信噪比。 本发明使得可以在光信号中不直接测量ASE来测量光信噪比。 本发明提供一种使用该方法的测量装置，测量电路，预加重方法，光通信系统和控制装置。

公开(公告)号：US5841557A

公开(公告)日：1998-11-24

申请号：US734605

申请日：1996-10-22

申请人： Kazue Otsuka ,  Hiroshi Onaka ,  Takafumi Terahara ,  Takao Naito

发明人： Kazue Otsuka ,  Hiroshi Onaka ,  Takafumi Terahara ,  Takao Naito

IPC分类号： H04J14/00 ,  G02B6/34 ,  H04B10/03 ,  H04B10/032 ,  H04B10/2537 ,  H04B10/2557 ,  H04B10/2563 ,  H04J14/02 ,  H04J14/04 ,  H04J14/06

CPC分类号： H04J14/02 ,  H04B10/2557 ,  H04B10/2563 ,  H04B10/532 ,  G02B6/2786 ,  H04J14/06

摘要： A method and apparatus for scrambling the polarization of signal lights combined into a wavelength division multiplexed signal light, to suppress non-linear optical effect and thereby improve transmission quality. For example, each signal light has a different polarization before being combined into a wavelength division multiplexed signal light. The polarization of the wavelength division multiplexed signal light can then be scrambled. Alternatively, the polarization of each signal light can be scrambled at a different scrambling frequency before being combined into the wavelength division multiplexed signal light.

摘要翻译： 一种将信号光的偏振加扰成波分复用信号光的方法和装置，以抑制非线性光学效应，从而提高传输质​​量。 例如，每个信号光在被组合成波分复用信号光之前具有不同的偏振。 波分复用信号光的偏振可以被加扰。 或者，每个信号光的偏振可以在被组合成波分复用信号光之前以不同的加扰频率被加扰。

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：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：US07035543B1

公开(公告)日：2006-04-25

申请号：US09853316

申请日：2001-05-10

申请人： Takeshi Hoshida ,  Hiroshi Onaka

发明人： Takeshi Hoshida ,  Hiroshi Onaka

IPC分类号： H04J14/02

CPC分类号： H04B10/69 ,  H04B10/677 ,  H04J14/02

摘要： A method and system for demultiplexing non-intensity modulated wavelength division multiplexed (WDM) signals includes receiving a WDM signal having a plurality of non-intensity modulated optical information signals. A plurality of the non-intensity modulated optical information signals are converted to intensity modulated signals while the plurality of non-intensity modulated optical information signals are multiplexed in at least a portion of the WDM signal.

摘要翻译： 用于解复用非强度调制波分复用（WDM）信号的方法和系统包括接收具有多个非强度调制光信息信号的WDM信号。 多个非强度调制光信息信号被转换为强度调制信号，而多个非强度调制光信息信号在WDM信号的至少一部分被复用。