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1. 发明授权

US10122467B2 Optical transmitter and control method for optical transmitter 有权
公开(公告)号：US10122467B2
公开(公告)日：2018-11-06
申请号：US15409731
申请日：2017-01-19
申请人： Fujitsu Optical Components Limited
发明人： Hiroshi Nishimoto
IPC分类号： H04B10/00 , H04B10/516 , G08C23/04 , H04B10/532 , H04B10/572
摘要： An optical transmitter that transmits an optical signal includes a dither superimposing circuit configured to generate a dither signal, the dither signal being used to control an operation of the optical transmitter to output the optical signal, and a control circuit configured to control intermittent superimposition of the dither signal onto a target to be controlled.

2. 发明授权

US10122507B2 Optical transmitter and method of controlling optical modulator 有权
公开(公告)号：US10122507B2
公开(公告)日：2018-11-06
申请号：US15172289
申请日：2016-06-03
申请人： Fujitsu Optical Components Limited
发明人： Hiroshi Nishimoto
IPC分类号： H04B10/10 , H04B10/08 , H04B10/516 , H04B10/564 , H04L5/00 , H04B10/50 , H04L27/00 , H04L27/20 , H04L27/36 , H04L27/18
摘要： An optical transmitter has an optical modulator with a Mach-Zehnder interferometer, a pilot signal generator configured to generate a pilot signal to be superimposed on a drive signal for driving the optical modulator or on a substrate bias voltage applied to the optical modulator, and a controller configured to detect a ratio between a pilot component and a direct current component contained in a light output from the optical modulator and control at least one of an amplitude of the drive signal and a level of the substrate bias voltage such that the ratio becomes a constant value.

3. 发明授权

US09069224B2 Optical modulator and optical modulation control method 有权
标题翻译：光调制器和光调制控制方法
公开(公告)号：US09069224B2
公开(公告)日：2015-06-30
申请号：US14541897
申请日：2014-11-14
申请人： FUJITSU OPTICAL COMPONENTS LIMITED
发明人： Hiroshi Nishimoto , Hiroshi Kuwahara
IPC分类号： H04J14/02 , H04B10/04 , H04J14/08 , H04B10/02 , H04J14/06 , G02F1/295 , G02F1/225 , H04B10/50 , G02F1/01 , G02F1/21
CPC分类号： G02F1/2257 , G02F1/0123 , G02F2001/212 , H04B10/50572 , H04B10/50575
摘要： An optical modulator includes: a modulator including an optical waveguide provided in a semiconductor substrate having an electro-optical effect and an electrode to apply an electric field depending on a bias voltage and a modulation signal to the optical waveguide; a driver circuit to generate a modulation signal in accordance with an input signal; a superimposer to superimpose a reference signal on the bias voltage, the reference signal having lower frequency than the modulation signal; and a controller to control a bias voltage in a direction orthogonal to a modulation direction of the modulator based on the frequency component of the reference signal extracted from a modulated optical signal generated by the modulator.
摘要翻译：光调制器包括：调制器，包括设置在具有电光效应的半导体衬底中的光波导和电极，以根据偏置电压和调制信号向光波导施加电场; 驱动电路，用于根据输入信号产生调制信号; 叠加器，用于将参考信号叠加在所述偏置电压上，所述参考信号的频率低于所述调制信号; 以及控制器，用于基于从调制器生成的调制光信号中提取的参考信号的频率分量来控制与调制器的调制方向正交的方向上的偏置电压。

4. 发明授权

US09448458B2 Optical communication device and method of controlling optical modulator 有权
标题翻译：光通信装置及光调制器的控制方法
公开(公告)号：US09448458B2
公开(公告)日：2016-09-20
申请号：US14950198
申请日：2015-11-24
申请人： Fujitsu Optical Components Limited
发明人： Hiroshi Nishimoto , Akihiro Toya
IPC分类号： G02F1/035 , G02F1/225 , G02F1/01 , G02F1/21
CPC分类号： G02F1/2255 , G02F1/0123 , G02F1/2257 , G02F2001/212 , H04B10/50575
摘要： An optical communication device has a pair of Mach-Zehnder optical modulators; a voltage monitor configured to monitor a voltage component acquired by optical-to-electric conversion of combined light output from the Mach-Zehnder optical modulators; a power monitor configured to monitor a power component acquired by square law detection of the optical-to-electric converted combined light from the Mach-Zehnder optical modulators; a first controller configured to control a substrate bias voltage or a driving amplitude applied to one of two waveguides of each of the Mach-Zehnder optical modulators based upon an output of the power monitor, and a second controller configured to control the substrate bias voltage or the driving amplitude applied to the other of the two waveguides of each of the Mach-Zehnder optical modulator based upon an output of the voltage monitor.
摘要翻译：光通信装置具有一对马赫 - 策德尔光学调制器; 电压监视器，被配置为监视从马赫 - 策德尔光调制器输出的组合光的光电转换获得的电压分量; 功率监视器，被配置为监视通过来自马赫 - 策德尔光学调制器的光电转换组合光的平方律检测获得的功率分量; 第一控制器，被配置为基于功率监视器的输出来控制施加到每个马赫 - 曾德尔光学调制器的两个波导中的一个波导的衬底偏置电压或驱动振幅;以及第二控制器，被配置为控制衬底偏置电压或基于电压监视器的输出，驱动振幅施加到每个Mach-Zehnder光学调制器的两个波导中的另一个的另一个。

5. 发明授权

US09450679B2 Optical transmitter, optical receiver and optical transceiver 有权
标题翻译：光发射机，光接收机和光收发器
公开(公告)号：US09450679B2
公开(公告)日：2016-09-20
申请号：US14283699
申请日：2014-05-21
申请人： Fujitsu Optical Components Limited
发明人： Hiroshi Nishimoto
IPC分类号： H04J3/04 , H04B10/61 , H04B10/40
CPC分类号： H04B10/616 , H04B10/40
摘要： An optical receiver includes: an optical receiving device configured to generate an analog received signal that represents a received modulated optical signal; an A/D converter configured to generate a digital received signal from the analog received signal; an E/O circuit configured to generate an optical digital signal from the digital received signal; an O/E circuit configured to generate an electric digital signal from the optical digital signal; and a digital signal processor configured to recover a data signal from the electric digital signal.
摘要翻译：光接收器包括：光接收装置，被配置为产生表示接收到的调制光信号的模拟接收信号; A / D转换器，被配置为从模拟接收信号产生数字接收信号; 被配置为从数字接收信号产生光学数字信号的E / O电路; O / E电路，被配置为从光学数字信号产生电数字信号; 以及配置成从电数字信号中恢复数据信号的数字信号处理器。

6. 发明申请

US20160147129A1 OPTICAL COMMUNICATION DEVICE AND METHOD OF CONTROLLING OPTICAL MODULATOR 有权
标题翻译：光通信设备和控制光调制器的方法
公开(公告)号：US20160147129A1
公开(公告)日：2016-05-26
申请号：US14950198
申请日：2015-11-24
申请人： Fujitsu Optical Components Limited
发明人： Hiroshi Nishimoto , AKIHIRO TOYA
IPC分类号： G02F1/225 , G02F1/01
CPC分类号： G02F1/2255 , G02F1/0123 , G02F1/2257 , G02F2001/212 , H04B10/50575
摘要： An optical communication device has a pair of Mach-Zehnder optical modulators; a voltage monitor configured to monitor a voltage component acquired by optical-to-electric conversion of combined light output from the Mach-Zehnder optical modulators; a power monitor configured to monitor a power component acquired by square law detection of the optical-to-electric converted combined light from the Mach-Zehnder optical modulators; a first controller configured to control a substrate bias voltage or a driving amplitude applied to one of two waveguides of each of the Mach-Zehnder optical modulators based upon an output of the power monitor, and a second controller configured to control the substrate bias voltage or the driving amplitude applied to the other of the two waveguides of each of the Mach-Zehnder optical modulator based upon an output of the voltage monitor.
摘要翻译：光通信装置具有一对马赫 - 策德尔光学调制器; 电压监视器，被配置为监视从马赫 - 策德尔光调制器输出的组合光的光电转换获得的电压分量; 功率监视器，被配置为监视通过来自马赫 - 策德尔光学调制器的光电转换组合光的平方律检测获得的功率分量; 第一控制器，被配置为基于功率监视器的输出来控制施加到每个马赫 - 曾德尔光学调制器的两个波导中的一个波导的衬底偏置电压或驱动振幅;以及第二控制器，被配置为控制衬底偏置电压或基于电压监视器的输出，驱动振幅施加到每个Mach-Zehnder光学调制器的两个波导中的另一个的另一个。

7. 发明授权

US09244328B2 Optical modulator and optical modulation control method 有权
公开(公告)号：US09244328B2
公开(公告)日：2016-01-26
申请号：US14541864
申请日：2014-11-14
申请人： FUJITSU OPTICAL COMPONENTS LIMITED
发明人： Hiroshi Nishimoto , Hiroshi Kuwahara
IPC分类号： H04J14/02 , H04B10/04 , H04J14/08 , H04B10/02 , G02F1/295 , G02F1/225 , H04B10/50 , G02F1/01 , G02F1/21
CPC分类号： G02F1/2257 , G02F1/0123 , G02F2001/212 , H04B10/50572 , H04B10/50575
摘要： An optical modulator includes: a modulator including an optical waveguide provided in a semiconductor substrate having an electro-optical effect and an electrode to apply an electric field depending on a bias voltage and a modulation signal to the optical waveguide; a driver circuit to generate a modulation signal in accordance with an input signal; a superimposer to superimpose a reference signal on the bias voltage, the reference signal having lower frequency than the modulation signal; and a controller to control a bias voltage in a direction orthogonal to a modulation direction of the modulator based on the frequency component of the reference signal extracted from a modulated optical signal generated by the modulator.

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