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1. 发明授权

US07236703B1 Optical wavelength division multiplexing device 有权
标题翻译：光波分复用装置
公开(公告)号：US07236703B1
公开(公告)日：2007-06-26
申请号：US10088503
申请日：2000-07-31
申请人： Shigeo Yamanaka , Takashi Mizuochi , Katsuhiro Shimizu , Koji Goto , Shinichi Nakagawa , Eiichi Shibano , Tadami Yasuda
发明人： Shigeo Yamanaka , Takashi Mizuochi , Katsuhiro Shimizu , Koji Goto , Shinichi Nakagawa , Eiichi Shibano , Tadami Yasuda
IPC分类号： H04J14/02
CPC分类号： H04B10/50 , G02B6/266 , G02B6/29376 , H04J14/02 , H04J14/0221
摘要： As is described above, an optical wavelength division multiplexing and transmission apparatus according to the present invention has the configuration in which a plurality of slave racks coupling to a master rack can be additionally installed one after another with the master rack. Therefore, in cases where it is desired to expand a function of a transmitter and a function of a receiver due to the increase of a quality of information to be transmitted, the additional installation of the slave rack can be performed without exerting influence on a communication means installed in advance and currently used. Accordingly, it can be expected that the optical wavelength division multiplexing and transmission apparatus is adapted for the optical communication service which is more and more increased in the future.
摘要翻译：如上所述，根据本发明的光波分复用和发送装置具有这样的配置，其中可以与主机架一个接一个地附加地安装耦合到主机架的多个从机架。因此，在由于要发送的信息的质量的增加而期望扩展发射机的功能和接收机的功能的情况下，可以执行从机架的附加安装而不对通信产生影响意味着事先安装，目前使用。因此，可以预期光波分复用和发送装置适用于将来越来越多的光通信业务。

2. 发明授权

US07239673B2 Optical reception apparatus 有权
标题翻译：光接收装置
公开(公告)号：US07239673B2
公开(公告)日：2007-07-03
申请号：US10416550
申请日：2002-09-12
申请人： Kazushige Sawada , Kazuo Kubo , Takashi Mizuochi , Hideo Yoshida , Hachiro Fujita , Katsuhiro Shimizu , Junichi Abe
发明人： Kazushige Sawada , Kazuo Kubo , Takashi Mizuochi , Hideo Yoshida , Hachiro Fujita , Katsuhiro Shimizu , Junichi Abe
IPC分类号： H03K9/00 , H04L27/00
CPC分类号： H03M13/6325 , G11B20/1833 , H04B10/695 , H04L1/004 , H04L25/063 , H04L25/067
摘要： An optical receiver includes a soft-decision deciding unit (7) for deciding an electric received signal according to a plurality of decision levels to output a multivalued decision signal, a demultiplexing unit (5) for serial-to-parallel converting the multivalued decision signal to output a multivalued parallel signal, a soft-decision error correction decoding unit (8) for correcting the multivalued parallel signal based on reliability information to output an error-corrected parallel received signal and decision results indicating the decision of the electric received signal according to the plurality of decision levels, a probability density distribution estimation unit (9) for estimating probability density distributions based on distributions of the decision results, and a decision level control unit (10) for controlling the plurality of decision levels based on the probability density distributions, thereby improving the transmission quality.
摘要翻译：一种光接收机包括：软判决决定单元，用于根据多个判决电平决定电接收信号以输出多值判定信号;解复用单元，用于串并转换多值判定信号; 输出多值并行信号;软判决纠错解码单元，用于根据可靠性信息校正多值并行信号，以输出纠错后的并行接收信号;以及判定结果，其指示电接收信号根据所述多个判定级别，基于所述判定结果的分布来估计概率密度分布的概率密度分布估计单元（9），以及用于基于所述概率密度分布来控制所述多个判定级别的判定级别控制单元（10），从而提高传输质量。

3. 发明授权

US06445478B1 Optical pulse position detecting circuit and an optical pulse generating apparatus and their methods 有权
公开(公告)号：US06445478B1
公开(公告)日：2002-09-03
申请号：US09764271
申请日：2001-01-19
申请人： Katsuhiro Shimizu , Takashi Mizuochi , Takeshi Komiya , Kiwami Matsushita , Tadayoshi Kitayama , Masatoshi Suzuki , Hidenori Taga , Shu Yamamoto , Noboru Edagawa , Itsuro Morita
发明人： Katsuhiro Shimizu , Takashi Mizuochi , Takeshi Komiya , Kiwami Matsushita , Tadayoshi Kitayama , Masatoshi Suzuki , Hidenori Taga , Shu Yamamoto , Noboru Edagawa , Itsuro Morita
IPC分类号： H04B1004
摘要： Detection of an optical pulse position uses an optical pulse string with a determined repetitive ratio and an electric clock signal with a same frequency as the repetitive ratio of the optical pulse string. A phase of the electric clock signal oscillator is shifted and supplied to an optical modulator. The optical modulator modulates the optical pulse string based on the electric clock signal and outputs a modulated optical signal. A photo detector converts the modulated optical signal output from the optical modulator to an electric signal. The phase shift amount of the electric clock signal is controlled to maximize an output from the photo detector. Additionally, a dither signal may be used in the control of the phase shift, more than the optical modulator may be employed, and/or more than color light source may be employed. The use of at least one of feed forward and feedback control provided by maximizing an output of the photo detector allows an optical pulse having a short width to be realized.

4. 发明授权

US5455704A Optical-fiber light amplifier 失效
标题翻译：光纤光放大器
公开(公告)号：US5455704A
公开(公告)日：1995-10-03
申请号：US111378
申请日：1993-08-24
申请人： Takashi Mizuochi , Tadayoshi Kitayama , Katsuhiro Shimizu , Kiwami Matsushita , Nobuyuki Takemura , Eiichi Nakagawa
发明人： Takashi Mizuochi , Tadayoshi Kitayama , Katsuhiro Shimizu , Kiwami Matsushita , Nobuyuki Takemura , Eiichi Nakagawa
IPC分类号： H01S3/094 , H01S3/13 , H01S3/131 , H04B10/152 , H04B10/17 , H04B10/12 , H04B10/00
CPC分类号： H04B10/2912 , H01S3/094003 , H01S3/1301 , H04B10/291 , H04B10/2931 , H04B10/2935 , H01S3/06754 , H01S3/09408 , H04B2210/003
摘要： An optical-fiber light amplifier using rare-earth-doped optical fibers. The light amplifier combines first and second excitation light from first and second sources to form combined excitation light and divides the combined excitation light for inverted distribution to both two optical fibers. The light entered one optical fiber and that entered the other optical fiber are polarized so as to be perpendicular to each other so that fluctuation of output level is prevented without mutual interference. Alternatively the first excitation light and the second excitation light may have different wavelengths; also in this case, fluctuation of level is prevented without any interference.
摘要翻译：一种使用稀土掺杂光纤的光纤光放大器。光放大器组合来自第一和第二源的第一和第二激发光以形成组合的激发光，并将用于反向分配的组合的激发光分成两个光纤。光进入一根光纤，并且进入另一根光纤被极化以便彼此垂直，从而在没有相互干扰的情况下防止输出电平的波动。或者，第一激发光和第二激发光可以具有不同的波长; 在这种情况下，也可以防止水平的波动而不受干扰。

5. 发明申请

US20130039643A1 OPTICAL COMMUNICATION SYSTEM 审中-公开
标题翻译：光通信系统
公开(公告)号：US20130039643A1
公开(公告)日：2013-02-14
申请号：US13642723
申请日：2010-04-23
申请人： Toshiyuki Tokura , Katsuhiro Shimizu , Kazuyuki Ishida , Takashi Mizuochi
发明人： Toshiyuki Tokura , Katsuhiro Shimizu , Kazuyuki Ishida , Takashi Mizuochi
IPC分类号： H04J14/02
CPC分类号： H04J14/0297 , H04B10/032 , H04J14/0295
摘要： An optical communication system including optical transmission systems each includes a transmission processing unit and a receiving processing unit, wherein the transmission processing unit includes an optical transmission unit that converts electric signals into optical signals, an auxiliary optical transmission unit that converts a part of the electric signals into an optical signal having a wavelength other than wavelengths of the optical signals generated by the optical transmission unit, and outputs the generated optical signal to a different transmission processing unit, and a wavelength multiplexing unit, and the receiving processing unit includes a wavelength demultiplexing unit, an optical receiving unit that converts the optical signals having the wavelengths of the optical signals generated by the optical transmission unit into electric signals, respectively, and an auxiliary optical receiving unit that converts the optical signal having the wavelength of the optical signal generated by the auxiliary optical transmission unit.
摘要翻译：包括光传输系统的光通信系统各自包括传输处理单元和接收处理单元，其中传输处理单元包括将电信号转换为光信号的光传输单元，将一部分电信号转换成具有由光传输单元生成的光信号的波长以外的波长的光信号，并将生成的光信号输出到不同的发送处理单元和波长复用单元，并且接收处理单元包括波长解复用单元，光接收单元，其将具有由光传输单元生成的光信号的波长的光信号分别转换为电信号;以及辅助光接收单元，其将具有光信号波长的光信号由辅助光传输单元产生。

6. 发明授权

US6028695A Optical modulating apparatus 失效
标题翻译：光调制装置
公开(公告)号：US6028695A
公开(公告)日：2000-02-22
申请号：US124993
申请日：1998-07-30
申请人： Aritomo Uemura , Takashi Mizuochi , Katsuhiro Shimizu , Kiwami Matsushita , Tadayoshi Kitayama , Masatoshi Suzuki , Hidenori Taga , Shu Yamamoto
发明人： Aritomo Uemura , Takashi Mizuochi , Katsuhiro Shimizu , Kiwami Matsushita , Tadayoshi Kitayama , Masatoshi Suzuki , Hidenori Taga , Shu Yamamoto
IPC分类号： G02F1/03 , H04B10/07 , H04B10/516 , H04B10/54 , H04B10/548 , H04B10/58 , H04B10/61 , G02F1/035 , G02F1/055
CPC分类号： G02F1/0327 , G02F2203/25
摘要： When an intensity modulating operation and a phase modulating operation are carried out by employing a 2-electrode MachZehnder type optical modulator preferably a LN-MZ type optical modulator, a drive signal of this 2-electrode LN-MZ type optical modulator is produced from an intensity modulation signal and a phase modulation signal with a low loss and a simple arrangement. A optical modulating apparatus includes a splitter/combiner structured to split an intensity modulation signal inputted into a first input terminal into a first electric signal having an in-phase relationship with that of the intensity modulation signal and second electric signal having an inverse phase relationship therewith, split a phase modulation signal inputted into a second input terminal into a third electric signal having an in-phase relationship with that of the phase modulation signal an also a fourth electric signal having an in-phase relationship therewith, combine the first electric signal with the fourth electric signal to thereby output a first combined signal, and combine the second electric signal with the third electric signal to thereby output a second combined signal; and an optical modulating means structured to split a light carrier wave entered from a light source into two light carrier waves, and to optically modulate the two sets of the split light carrier waves by using the first combined signal and the second combined signal derived from the splitter/combiner, and combine the two phase-modulated above said light carrier waves to output an optical modulation signal.
摘要翻译：当通过使用优选为LN-MZ型光调制器的2电极MachZehnder型光学调制器进行强度调制操作和相位调制操作时，该2电极LN-MZ型光调制器的驱动信号由强度调制信号和具有低损耗和简单布置的相位调制信号。光调制装置包括：分离器/组合器，被构造成将输入到第一输入端的强度调制信号分成与强度调制信号的同相关系的第一电信号和与其相反的相位关系的第二电信号将输入到第二输入端子的相位调制信号分别成为与相位调制信号同相的同步关系的第三电信号，以及与其同相关系的第四电信号，将第一电信号与第四电信号，从而输出第一组合信号，并将第二电信号与第三电信号组合，从而输出第二组合信号; 以及光调制装置，被构造成将从光源进入的光载波分成两个光载波，并且通过使用从第二组合信号导出的第一组合信号和第二组合信号对两组分裂光载波进行光学调制分离器/组合器，并且组合在所述轻载波上的两个相位调制以输出光调制信号。

7. 发明授权

US06236488B1 Optical pulse position detecting circuit and an optical pulse generating apparatus and their methods 失效
标题翻译：光脉冲位置检测电路及光脉冲发生装置及其方法
公开(公告)号：US06236488B1
公开(公告)日：2001-05-22
申请号：US09052072
申请日：1998-03-31
申请人： Katsuhiro Shimizu , Takashi Mizuochi , Takeshi Komiya , Kiwami Matsushita , Tadayoshi Kitayama , Masatoshi Suzuki , Hidenori Taga , Shu Yamamoto , Noboru Edagawa , Itsuro Morita
发明人： Katsuhiro Shimizu , Takashi Mizuochi , Takeshi Komiya , Kiwami Matsushita , Tadayoshi Kitayama , Masatoshi Suzuki , Hidenori Taga , Shu Yamamoto , Noboru Edagawa , Itsuro Morita
IPC分类号： H04B1004
CPC分类号： G02F1/0327 , G01J11/00 , G02F2203/26 , H04J14/08
摘要： Detection of an optical pulse position uses an optical pulse string with a determined repetitive ratio and an electric clock signal with a same frequency as the repetitive ratio of the optical pulse string. A phase of the electric clock signal oscillator is shifted and supplied to an optical modulator. The optical modulator modulates the optical pulse string based on the electric clock signal and outputs a modulated optical signal. A photo detector converts the modulated optical signal output from the optical modulator to an electric signal. The phase shift amount of the electric clock signal is controlled to maximize an output from the photo detector. Additionally, a dither signal may be used in the control of the phase shift, more than the optical modulator may be employed, and/or more than color light source may be employed. The use of at least one of feed forward and feedback control provided by maximizing an output of the photo detector allows an optical pulse having a short width to be realized.
摘要翻译：光脉冲位置的检测使用具有确定的重复比率的光脉冲串和具有与光脉冲串的重复比相同频率的电时钟信号。电时钟信号振荡器的相位移位并提供给光调制器。光调制器基于电时钟信号调制光脉冲串，并输出调制光信号。光检测器将从光调制器输出的调制光信号转换为电信号。控制电时钟信号的相移量使光检测器的输出最大化。另外，抖动信号可以用于相移的控制，可以采用多于光调制器，和/或多于彩色光源。使用通过使光检测器的输出最大化而提供的前馈和反馈控制中的至少一个允许实现具有短宽度的光脉冲。

8. 发明授权

US5506724A Gain controllable optical amplifier and applications thereof 失效
标题翻译：增益可控光放大器及其应用
公开(公告)号：US5506724A
公开(公告)日：1996-04-09
申请号：US309921
申请日：1994-09-21
申请人： Katsuhiro Shimizu , Takashi Mizuochi , Kuniaki Motoshima , Tadayoshi Kitayama
发明人： Katsuhiro Shimizu , Takashi Mizuochi , Kuniaki Motoshima , Tadayoshi Kitayama
IPC分类号： G02F1/35 , H01S3/094 , H01S3/13 , H04B10/07 , H04B10/293 , H04B10/294 , H04B10/564 , H04B10/572 , H04J14/00 , H04J14/02 , H01S3/00
CPC分类号： H04B10/296 , H01S3/094003 , H01S3/1301 , H01S2301/06 , H01S3/094011 , H01S3/094023
摘要： An optical fiber which amplifies an input signal by a pump source, a compensation-signal source which injects a compensation-signal propagating contra-directionally with respect to the input signal Into the optical fiber, a gain detector which measures a spontaneous emission light of the pump source at an input side of the optical fiber and a compensation-signal source controller which controls output of the compensation-signal source based on output of the gain detector are provided. In addition, a coupler and a wavelength selective reflector which reflects a light of the same wavelength as the compensation-signal selectively, are provided at the input side of the optical fiber.
摘要翻译：一种通过泵浦源放大输入信号的光纤，将与输入信号相反方向传播的补偿信号注入到光纤中的补偿信号源，测量自发发射光的增益检测器，提供了在光纤的输入侧的泵浦源，以及基于增益检测器的输出来控制补偿信号源的输出的补偿信号源控制器。此外，在光纤的输入侧设置耦合器和选择性地反射与补偿信号相同波长的光的波长选择性反射器。

9. 发明授权

US07016614B1 Optical wavelength division multiplexing transmission suppressing four-wave mixing and SPM-GVD effects 失效
标题翻译：光波分复用传输抑制四波混频和SPM-GVD效应
公开(公告)号：US07016614B1
公开(公告)日：2006-03-21
申请号：US09723292
申请日：2000-11-28
申请人： Satoshi Kajiya , Katsuhiro Shimizu , Yukio Kobayashi , Takashi Mizuochi
发明人： Satoshi Kajiya , Katsuhiro Shimizu , Yukio Kobayashi , Takashi Mizuochi
IPC分类号： H04B10/00
CPC分类号： H04J14/0227 , H04B10/291
摘要： An optical repeater is provided between a first optical fiber transmission path and a second optical fiber transmission path having a zero-dispersion wavelength different from the first optical fiber transmission path. This optical repeater wave-converts a wavelength division multiplex signal input from the first optical fiber transmission path with respect to respective wavelengths thereof, and outputs the wave-converted signal to the second optical fiber transmission path.
摘要翻译：在第一光纤传输路径和具有不同于第一光纤传输路径的零色散波长的第二光纤传输路径之间提供光中继器。该光中继器相对于其波长对从第一光纤传输路径输入的波分复用信号进行波变换，并将该波转换信号输出到第二光纤传输路径。

10. 发明授权

US5367587A Optical amplifier 失效
标题翻译：光放大器
公开(公告)号：US5367587A
公开(公告)日：1994-11-22
申请号：US193721
申请日：1994-02-09
申请人： Takashi Mizuochi , Tadayoshi Kitayama , Katsuhiro Shimizu , Kiwami Matsushita , Nobuyuki Takemura , Eiichi Nakagawa
发明人： Takashi Mizuochi , Tadayoshi Kitayama , Katsuhiro Shimizu , Kiwami Matsushita , Nobuyuki Takemura , Eiichi Nakagawa
IPC分类号： H01S3/094 , H01S3/13 , H01S3/131 , H04B10/293 , H04B10/50 , H04B10/66 , G02B6/26 , H01S3/00
CPC分类号： H04B10/66 , H01S3/094003 , H01S3/1301 , H04B10/2935 , H04B10/503 , H01S3/06754 , H01S3/09408 , H01S3/094096 , H04B2210/003
摘要： An optical-fiber light amplifier using rare-earth-doped optical fibers. The light amplifier combines first and second excitation light from first and second sources to form combined excitation light and divides the combined excitation light for inverted distribution to both two optical fibers. The light entered one optical fiber and that entered the other optical fiber are polarized so as to be perpendicular to each other so that fluctuation of output level is prevented without mutual interference. Alternatively the first excitation light and the second excitation light may have different wavelengths; also in this case, fluctuation of level is prevented without any interference.
摘要翻译：一种使用稀土掺杂光纤的光纤光放大器。光放大器组合来自第一和第二源的第一和第二激发光以形成组合的激发光，并将用于反向分配的组合的激发光分成两个光纤。光进入一根光纤，并且进入另一根光纤被极化以便彼此垂直，从而在没有相互干扰的情况下防止输出电平的波动。或者，第一激发光和第二激发光可以具有不同的波长; 在这种情况下，也可以防止水平的波动而不受干扰。

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