公开(公告)号：US20100172653A1

公开(公告)日：2010-07-08

申请号：US12723210

申请日：2010-03-12

申请人： Kazushige Yonenaga ,  Mikio Yoneyama ,  Masahito Tomizawa ,  Akira Hirano ,  Shoichiro Kuwahara ,  Tomoyoshi Kataoka ,  Akihide Sano ,  Gentaro Funatsu

发明人： Kazushige Yonenaga ,  Mikio Yoneyama ,  Masahito Tomizawa ,  Akira Hirano ,  Shoichiro Kuwahara ,  Tomoyoshi Kataoka ,  Akihide Sano ,  Gentaro Funatsu

IPC分类号： H04B10/00

CPC分类号： H04B10/58 ,  H04B10/5051 ,  H04B10/5055 ,  H04B10/50575 ,  H04B10/54 ,  H04B10/66

摘要： An optical transmission system is provided in which the optimum operating point of a Mach-Zehnder interferometer, matched to the optical frequency of the light source on the transmitting side, can be set. The optical receiver (2) has an infinitesimal-modulated signal component detection circuit (222), which uses the signal train output from a balanced detection circuit (221) to detect the infinitesimal-modulated signal component applied to the phase adjustment terminal (201) of an MZI (200) by an infinitesimal-modulated signal oscillation circuit (224); a synchronous detection circuit (223), which synchronously detects the infinitesimal-modulated signals output from the infinitesimal-modulated signal component detection circuit (222) and infinitesimal-modulated signal oscillation circuit (224) and detects the error signal component arising from the shift between the optical signal carrier frequency and the optical frequency characteristic of the MZI (200); and a controller (207), which outputs a control signal to adjust the phase difference between two split optical signals output from the MZI (200) so as to correct the shift amount.

摘要翻译： 提供了一种光传输系统，其中可以设置与发射侧的光源的光频率相匹配的马赫 - 曾德干涉仪的最佳工作点。 光接收器（2）具有无穷小调制信号分量检测电路（222），其使用从平衡检测电路（221）输出的信号串来检测施加到相位调整端子（201）的无穷小调制信号分量， 通过无穷小调制信号振荡电路（224）的MZI（200）; 同步检测电路（223），其同步地检测从无穷小调制信号分量检测电路（222）和无穷小调制信号振荡电路（224）输出的无穷小调制信号，并检测由第二调制信号分量检测电路 MZI（200）的光信号载波频率和光频特性; 以及控制器（207），其输出控制信号以调整从MZI（200）输出的两个分离光信号之间的相位差，以校正偏移量。

公开(公告)号：US07734194B2

公开(公告)日：2010-06-08

申请号：US10555710

申请日：2005-03-17

申请人： Kazushige Yonenaga ,  Mikio Yoneyama ,  Masahito Tomizawa ,  Akira Hirano ,  Shoichiro Kuwahara ,  Tomoyoshi Kataoka ,  Akihide Sano ,  Gentaro Funatsu

发明人： Kazushige Yonenaga ,  Mikio Yoneyama ,  Masahito Tomizawa ,  Akira Hirano ,  Shoichiro Kuwahara ,  Tomoyoshi Kataoka ,  Akihide Sano ,  Gentaro Funatsu

IPC分类号： H04B10/06

CPC分类号： H04B10/58 ,  H04B10/5051 ,  H04B10/5055 ,  H04B10/50575 ,  H04B10/54 ,  H04B10/66

摘要： An optical transmission system is provided in which the optimum operating point of a Mach-Zehnder interferometer, matched to the optical frequency of the light source on the transmitting side, can be set. The optical receiver (2) has an infinitesimal-modulated signal component detection circuit (222), which uses the signal train output from a balanced detection circuit (221) to detect the infinitesimal-modulated signal component applied to the phase adjustment terminal (201) of an MZI (200) by an infinitesimal-modulated signal oscillation circuit (224); a synchronous detection circuit (223), which synchronously detects the infinitesimal-modulated signals output from the infinitesimal-modulated signal component detection circuit (222) and infinitesimal-modulated signal oscillation circuit (224) and detects the error signal component arising from the shift between the optical signal carrier frequency and the optical frequency characteristic of the MZI (200); and a controller (207), which outputs a control signal to adjust the phase difference between two split optical signals output from the MZI (200) so as to correct the shift amount.

摘要翻译： 提供了一种光传输系统，其中可以设置与发射侧的光源的光频率相匹配的马赫 - 曾德干涉仪的最佳工作点。 光接收器（2）具有无穷小调制信号分量检测电路（222），其使用从平衡检测电路（221）输出的信号串来检测施加到相位调整端子（201）的无穷小调制信号分量， 通过无穷小调制信号振荡电路（224）的MZI（200）; 同步检测电路（223），其同步地检测从无穷小调制信号分量检测电路（222）和无穷小调制信号振荡电路（224）输出的无穷小调制信号，并检测由 MZI（200）的光信号载波频率和光频特性; 以及控制器（207），其输出控制信号以调整从MZI（200）输出的两个分离光信号之间的相位差，以校正偏移量。

公开(公告)号：US07995930B2

公开(公告)日：2011-08-09

申请号：US12092031

申请日：2006-05-19

申请人： Mikio Yoneyama ,  Fumiaki Saitou ,  Shigeru Ono ,  Yosuke Takeuchi ,  Kazushige Yonenaga ,  Shoichiro Kuwahara ,  Eiji Yoshida ,  Yutaka Miyamoto ,  Hiroto Kawakami

发明人： Mikio Yoneyama ,  Fumiaki Saitou ,  Shigeru Ono ,  Yosuke Takeuchi ,  Kazushige Yonenaga ,  Shoichiro Kuwahara ,  Eiji Yoshida ,  Yutaka Miyamoto ,  Hiroto Kawakami

IPC分类号： H04B10/06

CPC分类号： H04L27/2071 ,  G02F1/0327 ,  H04B10/677 ,  H04L27/223

摘要： The present invention relates to an optical receiver, in which the transmittance of a Mach-Zehnder interferometer can be locked at a normal operation point in a simple structure and control. A transmittance detecting circuit and a minute modulation signal detecting circuit are provided in parallel after a balanced optical receiver, and a switch is selectively connectable either a minute modulation signal detecting circuit and a transmittance detecting circuit. In the initial stage of frequency pull-in, the switch is set to connect the transmittance detecting circuit to the synchronous detection circuit. If the transmittance detecting circuit detects that the transmittance of the Mach-Zehnder interferometer at the carrier frequency becomes a desired transmittance, the connection of the switch is switched from the transmittance detecting circuit to the minute modulation signal detecting circuit.

摘要翻译： 光接收机技术领域本发明涉及一种光接收机，其中可以以简单的结构和控制将马赫 - 曾德干涉仪的透射率锁定在正常操作点。 在平衡光接收器之后并联设置透射检测电路和微调信号检测电路，并且开关可选择性地连接微调制信号检测电路和透射检测电路。 在频率拉入的初始阶段，开关被设置为将透射检测电路连接到同步检测电路。 如果透射检测电路检测到载波频率下的马赫 - 策德尔干涉仪的透射率变为期望的透射率，则将开关的连接从透射检测电路切换到微调制信号检测电路。

公开(公告)号：US07536108B2

公开(公告)日：2009-05-19

申请号：US10185486

申请日：2002-06-26

申请人： Akira Hirano ,  Yutaka Miyamoto ,  Masahito Tomizawa ,  Shoichiro Kuwahara ,  Hiroshi Takahashi ,  Yasuyuki Inoue

发明人： Akira Hirano ,  Yutaka Miyamoto ,  Masahito Tomizawa ,  Shoichiro Kuwahara ,  Hiroshi Takahashi ,  Yasuyuki Inoue

IPC分类号： H04B10/12

CPC分类号： H04B10/25133 ,  H04B10/25137

摘要： The present invention relates to an automatic dispersion compensating optical link system. Carrier suppressed RZ encoded optical signals generated using carrier suppressing means and binary NRZ code or partial response code, or carrier suppressed clock signals generated using carrier suppressing means and clock signals are transmitted on an optical transmission line. Two bands of the carrier suppressed RZ encoded optical signals or carrier suppressed clock signals transmitted on the optical transmission line are each divided into bands and are received. Phase information of the respective basebands is extracted from the binary NRZ code components or partial response code components or clock signals in each band and the relative phase difference thereof is detected. The chromatic dispersion value of the optical transmission line is then calculated from the relative phase difference.

摘要翻译： 本发明涉及自动色散补偿光链路系统。 载波抑制使用载波抑制装置产生的RZ编码光信号和二进制NRZ码或部分响应码，或者使用载波抑制装置和时钟信号产生的载波抑制时钟信号在光传输线路上传输。 载波抑制RZ编码的光信号的两个频带或在光传输线路上传输的载波抑制时钟信号各自被分成频带并被接收。 从每个频带中的二进制NRZ码分量或部分响应码分量或时钟信号中提取各个基带的相位信息，并检测其相对相位差。 然后从相对相位差计算光传输线的色散值。

公开(公告)号：US20090097867A1

公开(公告)日：2009-04-16

申请号：US12092031

申请日：2006-05-19

申请人： Mikio Yoneyama ,  Fumiaki Saitou ,  Shigeru Ono ,  Yosuke Takeuchi ,  Kazushige Yonenaga ,  Shoichiro Kuwahara ,  Eiji Yoshida ,  Yutaka Miyamoto ,  Hiroto Kawakami

发明人： Mikio Yoneyama ,  Fumiaki Saitou ,  Shigeru Ono ,  Yosuke Takeuchi ,  Kazushige Yonenaga ,  Shoichiro Kuwahara ,  Eiji Yoshida ,  Yutaka Miyamoto ,  Hiroto Kawakami

IPC分类号： H04B10/06

CPC分类号： H04L27/2071 ,  G02F1/0327 ,  H04B10/677 ,  H04L27/223

摘要： The present invention relates to an optical receiver, in which the transmittance of a Mach-Zehnder interferometer can be locked at a normal operation point in a simple structure and control.A transmittance detecting circuit and a minute modulation signal detecting circuit are provided in parallel after a balanced optical receiver, and a switch is selectively connectable either a minute modulation signal detecting circuit and a transmittance detecting circuit. In the initial stage of frequency pull-in, the switch is set to connect the transmittance detecting circuit to the synchronous detection circuit. If the transmittance detecting circuit detects that the transmittance of the Mach-Zehnder interferometer at the carrier frequency becomes a desired transmittance, the connection of the switch is switched from the transmittance detecting circuit to the minute modulation signal detecting circuit.

摘要翻译： 光接收机技术领域本发明涉及一种光接收机，其中可以以简单的结构和控制将马赫 - 曾德干涉仪的透射率锁定在正常操作点。 在平衡光接收器之后并联设置透射检测电路和微调信号检测电路，并且开关可选择性地连接微调制信号检测电路和透射检测电路。 在频率拉入的初始阶段，开关被设置为将透射检测电路连接到同步检测电路。 如果透射检测电路检测到载波频率下的马赫 - 策德尔干涉仪的透射率变为期望的透射率，则将开关的连接从透射检测电路切换到微调制信号检测电路。

公开(公告)号：US07116917B2

公开(公告)日：2006-10-03

申请号：US10185407

申请日：2002-06-26

申请人： Yutaka Miyamoto ,  Akira Hirano ,  Shoichiro Kuwahara ,  Masahito Tomizawa

发明人： Yutaka Miyamoto ,  Akira Hirano ,  Shoichiro Kuwahara ,  Masahito Tomizawa

IPC分类号： H04B10/12

CPC分类号： H04B10/5561 ,  H04B10/5051 ,  H04B10/5055 ,  H04B10/516 ,  H04B10/5162 ,  H04B10/677 ,  H04B2210/517 ,  H04J14/0227 ,  H04J14/0246 ,  H04J14/0279

摘要： The present invention suppresses to a minimum the degradation of the transmission quality caused by chromatic dispersion characteristic of an optical transmission medium, and the interplay between the chromatic dispersion and non-linear optical effects in dense WDM transport systems. A baseband input data signal is pre-coded in advance by a pre-coding unit, phase modulation is carried out using a pre-coded signal by the optical phase modulating unit, and the phase modulated optical signal is converted to an RZ intensity modulated signal by the optical filter unit that performs phase-shift-keying to amplitude-shift-keying conversion. For example, an optical phase modulating unit generates an encoded DPSK phase modulated signal using a differential phase shirt keying (DPSK) format, and a phase modulated signal is converted to an RZ intensity modulated signal by the optical filter unit disposed downstream of the optical phase modulating unit.

公开(公告)号：US08005374B2

公开(公告)日：2011-08-23

申请号：US12723210

申请日：2010-03-12

申请人： Kazushige Yonenaga ,  Mikio Yoneyama ,  Masahito Tomizawa ,  Akira Hirano ,  Shoichiro Kuwahara ,  Tomoyoshi Kataoka ,  Akihide Sano ,  Gentaro Funatsu

发明人： Kazushige Yonenaga ,  Mikio Yoneyama ,  Masahito Tomizawa ,  Akira Hirano ,  Shoichiro Kuwahara ,  Tomoyoshi Kataoka ,  Akihide Sano ,  Gentaro Funatsu

IPC分类号： H04B10/06

CPC分类号： H04B10/58 ,  H04B10/5051 ,  H04B10/5055 ,  H04B10/50575 ,  H04B10/54 ,  H04B10/66

摘要： An optical transmission system is provided in which the optimum operating point of a Mach-Zehnder interferometer, matched to the optical frequency of the light source on the transmitting side, can be set. The optical receiver (2) has an infinitesimal-modulated signal component detection circuit (222), which uses the signal train output from a balanced detection circuit (221) to detect the infinitesimal-modulated signal component applied to the phase adjustment terminal (201) of an MZI (200) by an infinitesimal-modulated signal oscillation circuit (224); a synchronous detection circuit (223), which synchronously detects the infinitesimal-modulated signals output from the infinitesimal-modulated signal component detection circuit (222) and infinitesimal-modulated signal oscillation circuit (224) and detects the error signal component arising from the shift between the optical signal carrier frequency and the optical frequency characteristic of the MZI (200); and a controller (207), which outputs a control signal to adjust the phase difference between two split optical signals output from the MZI (200) so as to correct the shift amount.

摘要翻译： 提供了一种光传输系统，其中可以设置与发射侧的光源的光频率相匹配的马赫 - 曾德干涉仪的最佳工作点。 光接收器（2）具有无穷小调制信号分量检测电路（222），其使用从平衡检测电路（221）输出的信号串来检测施加到相位调整端子（201）的无穷小调制信号分量， 通过无穷小调制信号振荡电路（224）的MZI（200）; 同步检测电路（223），其同步地检测从无穷小调制信号分量检测电路（222）和无穷小调制信号振荡电路（224）输出的无穷小调制信号，并检测由第二调制信号分量检测电路 MZI（200）的光信号载波频率和光频特性; 以及控制器（207），其输出控制信号以调整从MZI（200）输出的两个分离光信号之间的相位差，以校正偏移量。