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    OPTICAL COMMUNICATION SYSTEM
    1.
    发明申请
    OPTICAL COMMUNICATION SYSTEM 审中-公开
    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。

    Optical modulating apparatus
    4.
    发明授权
    Optical modulating apparatus 失效
    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。

    Optical transmission system and repeater
    5.
    发明授权
    Optical transmission system and repeater 有权
    光传输系统和中继器

    公开(公告)号：US08320771B2

    公开(公告)日：2012-11-27

    申请号：US12812367

    申请日：2008-01-22

    申请人： Tsuyoshi Yoshida ,  Toshiyuki Tokura ,  Takashi Sugihara ,  Katsuhiro Shimizu ,  Aritomo Uemura ,  Hiroki Shima ,  Kiyoshi Onohara

    发明人： Tsuyoshi Yoshida ,  Toshiyuki Tokura ,  Takashi Sugihara ,  Katsuhiro Shimizu ,  Aritomo Uemura ,  Hiroki Shima ,  Kiyoshi Onohara

    IPC分类号： H04B10/00

    CPC分类号： H04J14/0221

    摘要： A repeater includes a variable optical attenuating unit that collectively attenuates WDM optical signal input, an optical-attenuation adjusting unit that adjusts attenuation in the variable optical attenuating unit, and an optical amplifying unit that collectively amplifies and outputs the WDM optical signal collectively attenuated, to a downstream side. An optical-attenuation adjusting unit includes an input level detector; an output level detector; an output-level transmitting unit that receives information of a signal level of WDM optical signal output by a repeater at an upstream side and transmits information of a signal level of the WDM optical signal detected by the output level detector to a repeater at a downstream side; and an attenuation amount controller that controls the variable optical attenuating unit by calculating an attenuation amount thereof based on information of a signal level detected by the input level detector and a signal level received by the output-level transmitting unit.

    摘要翻译： 中继器包括共同衰减WDM光信号输入的可变光衰减单元，调整可变光衰减单元中的衰减的光衰减调整单元和共同放大并输出共同衰减的WDM光信号的光放大单元， 下游侧。 光衰减调整单元包括输入电平检测器; 输出电平检测器; 输出级发送单元，其接收由上游侧的中继器输出的WDM光信号的信号电平的信息，并将由输出电平检测器检测出的WDM光信号的信号电平的信息发送到下游侧的中继器 ; 以及衰减量控制器，其通过基于由输入电平检测器检测到的信号电平的信息和由输出电平发送单元接收的信号电平来计算其衰减量来控制可变光衰减单元。

    OPTICAL TRANSMISSION SYSTEM AND REPEATER
    6.
    发明申请
    OPTICAL TRANSMISSION SYSTEM AND REPEATER 有权
    光传输系统和复用器

    公开(公告)号：US20100284694A1

    公开(公告)日：2010-11-11

    申请号：US12812367

    申请日：2008-01-22

    申请人： Tsuyoshi Yoshida ,  Toshiyuki Tokura ,  Takashi Sugihara ,  Katsuhiro Shimizu ,  Aritomo Uemura ,  Hiroki Shima ,  Kiyoshi Onohara

    发明人： Tsuyoshi Yoshida ,  Toshiyuki Tokura ,  Takashi Sugihara ,  Katsuhiro Shimizu ,  Aritomo Uemura ,  Hiroki Shima ,  Kiyoshi Onohara

    IPC分类号： H04J14/02

    CPC分类号： H04J14/0221

    摘要： A repeater includes a variable optical attenuating unit that collectively attenuates WDM optical signal input, an optical-attenuation adjusting unit that adjusts attenuation in the variable optical attenuating unit, and an optical amplifying unit that collectively amplifies and outputs the WDM optical signal collectively attenuated, to a downstream side. An optical-attenuation adjusting unit includes an input level detector; an output level detector; an output-level transmitting unit that receives information of a signal level of WDM optical signal output by a repeater at an upstream side and transmits information of a signal level of the WDM optical signal detected by the output level detector to a repeater at a downstream side; and an attenuation amount controller that controls the variable optical attenuating unit by calculating an attenuation amount thereof based on information of a signal level detected by the input level detector and a signal level received by the output-level transmitting unit.

    摘要翻译： 中继器包括共同衰减WDM光信号输入的可变光衰减单元，调整可变光衰减单元中的衰减的光衰减调整单元和共同放大并输出共同衰减的WDM光信号的光放大单元， 下游侧。 光衰减调整单元包括输入电平检测器; 输出电平检测器; 输出级发送单元，其接收由上游侧的中继器输出的WDM光信号的信号电平的信息，并将由输出电平检测器检测出的WDM光信号的信号电平的信息发送到下游侧的中继器 ; 以及衰减量控制器，其通过基于由输入电平检测器检测到的信号电平的信息和由输出电平发送单元接收的信号电平来计算其衰减量来控制可变光衰减单元。

    Optical pulse position detecting circuit and an optical pulse generating apparatus and their methods
    9.
    发明授权
    Optical pulse position detecting circuit and an optical pulse generating apparatus and their methods 失效
    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。