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71. 发明申请

US20180219354A1 Method for Control of Optical Intensity and Extinction Ratio of Laser Modulation in an Optical Transmitter 审中-公开
公开(公告)号：US20180219354A1
公开(公告)日：2018-08-02
申请号：US15883443
申请日：2018-01-30
申请人： Hilight Semiconductor Limited
发明人： William REDMAN-WHITE , Dominique COUE , Colin WHITFIELD , Christian ROOKES , Derek HUTCHINS , George BROCKLEHURST
IPC分类号： H01S5/0683 , H04B10/50
CPC分类号： H01S5/0683 , H01S5/042 , H01S5/06832 , H04B10/505 , H04B10/50572 , H04B10/50575
摘要： A system for controlling an optical intensity and modulation of an optical data transmitter which includes current driver circuitry configured to provide a drive current to a laser diode wherein said current comprises a fixed component and a modulated component, said modulated component having a magnitude related to an input data stream. The monitor circuitry contains a photodiode and a first transimpedance amplifier coupled to said photodiode, said monitor circuitry configured to provide an output signal related to an optical intensity of said laser diode. The system further includes replica monitor circuitry containing a replica capacitor with a replica capacitance and a second transimpedance amplifier configured to be substantially identical in construction to said first transimpedance amplifier, said second transimpedance amplifier coupled to said replica capacitor. The system further includes replica capacitance control circuitry configured to control said replica capacitance of said replica capacitor to match a capacitance associated with said photodiode.

72. 发明申请

US20180212682A1 RING-RESONATOR MODULATION OF AN OPTICAL SIGNAL 审中-公开
公开(公告)号：US20180212682A1
公开(公告)日：2018-07-26
申请号：US15745709
申请日：2015-07-21
申请人： HEWLETT PACKARD ENTERPRISE DEVELOPMENT LP
发明人： Janet CHEN , Cheng LI , Marco FIORENTINO , Raymond G BEAUSOLEIL
IPC分类号： H04B10/50 , H04B10/2575
CPC分类号： H04B10/50572 , G02B6/29338 , G02B6/29395 , G02F1/0121 , G02F1/025 , G02F2201/58 , G02F2203/15 , H04B10/0799 , H04B10/25755 , H04B10/5051 , H04B10/506 , H04B10/675 , H04B10/801
摘要： One example includes an optical transmitter system. The system includes a waveguide to receive and propagate an optical signal. The system also includes a ring modulation system comprising a ring resonator that is optically coupled to the waveguide and is to resonate a given wavelength of the optical signal in response to an input data signal that is provided to a modulation amplifier to provide carrier injection to change a refractive index of the ring resonator to resonate the given wavelength of the optical signal to modulate the optical signal. The system further includes a tuning controller associated with the ring modulation system. The tuning controller can implement iterative feedback tuning of the ring modulation system based on a relative amplitude of an optical intensity of the given wavelength in the ring resonator and a variable reference amplitude to substantially stabilize the ring resonator with respect to the given wavelength.

73. 发明授权

US09729244B2 Apparatus and method for monitoring signal quality of a modulated optical signal 有权
公开(公告)号：US09729244B2
公开(公告)日：2017-08-08
申请号：US14518262
申请日：2014-10-20
申请人： ADVA Optical Networking SE
发明人： Mohammad Alfiad , Sorin Tibuleac
IPC分类号： H04B10/588 , H04B10/50 , H04B10/61
CPC分类号： H04B10/50572 , H04B10/50575 , H04B10/50593 , H04B10/50595 , H04B10/588 , H04B10/615
摘要： A transmitter with at least one optical modulator adapted to modulate the optical signal output by a laser source to generate a modulated optical signal, wherein the optical signal output by the laser source is tapped and supplied to a monitoring circuit comprising an optical front end configured to select signal components of the tapped modulated optical signal and to convert the selected signal components of the tapped modulated optical signal into analog signals, and comprising at least one analog-to-digital converter, ADC, adapted to perform equivalent-time sampling of the analog signals to provide digital signals processed by a processing unit to monitor signal quality of the modulated optical signal.

74. 发明申请

US20170033871A1 OPTICAL TRANSMITTER AND METHOD OF CONTROLLING OPTICAL MODULATOR 审中-公开
标题翻译：光学发射器和控制光学调制器的方法
公开(公告)号：US20170033871A1
公开(公告)日：2017-02-02
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： H04B10/516 , H04L5/00 , H04B10/564
CPC分类号： H04L5/0048 , H04B10/5053 , H04B10/50572 , H04B10/50575 , H04B2210/075 , H04L5/0008 , H04L27/0008 , H04L27/18 , H04L27/2096 , H04L27/36
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.
摘要翻译：一种光发射机具有一个具有马赫 - 策德尔干涉仪的光学调制器，一个导频信号发生器，被配置为产生一个导频信号，该导频信号叠加在用于驱动该光学调制器的驱动信号上或一个衬底偏置电压上，控制器，其被配置为检测包含在从所述光调制器输出的光的导频分量和直流分量之间的比率，并且控制所述驱动信号的幅度和所述衬底偏置电压的电平中的至少一个，使得所述比率变为恒定值。

75. 发明授权

US09525480B2 Optical communication module, optical network unit, and method of controlling light-emitting element 有权
标题翻译：光通信模块，光网络单元和控制发光元件的方法
公开(公告)号：US09525480B2
公开(公告)日：2016-12-20
申请号：US14423451
申请日：2013-08-07
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Shuitsu Yuda , Naruto Tanaka
IPC分类号： H04B10/077 , H04B10/50 , H04B10/54 , H04B10/27 , H01S5/042 , H01S5/0683
CPC分类号： H04B10/0775 , H01S5/0427 , H01S5/06832 , H04B10/0773 , H04B10/27 , H04B10/272 , H04B10/502 , H04B10/504 , H04B10/50572 , H04B10/541
摘要： An optical communication module includes a modulation current supply circuit for supplying to a light-emitting element for transmitting a burst optical signal, a modulation current having magnitude in accordance with a logical value of data to be transmitted, a light-receiving element for monitoring, for outputting a current in accordance with intensity of light received from the light-emitting element, a measurement unit for measuring an output current from the light-receiving element for monitoring at set measurement timing, an adjustment unit for adjusting magnitude of the modulation current based on a result of measurement of the output current by the measurement unit, and a measurement timing setting unit for setting measurement timing based on a control signal for controlling transmission of the burst optical signal.
摘要翻译：光通信模块包括：调制电流供给电路，用于向发送突发光信号的发光元件提供调制电流，调制电流根据要发送的数据的逻辑值，用于监视的光接收元件，用于根据从发光元件接收的光的强度输出电流;测量单元，用于测量来自用于在设定的测量定时监视的光接收元件的输出电流;调节单元，用于调整基于调制电流的幅度基于由测量单元测量输出电流的结果;以及测量定时设置单元，用于基于用于控制突发光信号的传输的控制信号来设置测量定时。

76. 发明申请

US20160218801A1 CONTROL APPARATUS AND METHOD FOR MONITORING OPTICAL FIBER LINK 有权
标题翻译：用于监控光纤链路的控制装置和方法
公开(公告)号：US20160218801A1
公开(公告)日：2016-07-28
申请号：US15007739
申请日：2016-01-27
申请人： ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
发明人： Hwan Seok CHUNG , Seung Hyun CHO , Jong Hyun LEE , Sang Soo LEE , Chan Gyo HAN
IPC分类号： H04B10/079 , H04B10/2575
CPC分类号： H04B10/07953 , H04B10/25759 , H04B10/50572 , H04B10/50575 , H04B10/564
摘要： An optical fiber cable of a mobile fronthaul system based on a radio over fiber (RoF), which includes a control apparatus for monitoring an analog optical link according to an exemplary embodiment, may be monitored. The monitoring control apparatus may include an optical signal monitor to monitor an optical signal passing through an optical fiber cable, and a system controller to control the optical signal based on a result of the monitoring. The optical signal monitor may calculate an average optical power, carrier-to-noise ratio (CNR), and a size of a nonlinear component from an electrical signal, which has been acquired from the optical signal. Then, the optical signal monitor may control the calculated average optical power, CNR, and nonlinear component.
摘要翻译：可以监视基于无线电光纤（RoF）的移动前端系统的光纤电缆，其包括用于监视根据示例性实施例的模拟光链路的控制装置。监视控制装置可以包括用于监视通过光纤电缆的光信号的光信号监视器，以及基于监视结果来控制光信号的系统控制器。光信号监视器可以根据从光信号获得的电信号计算平均光功率，载波噪声比（CNR）和非线性分量的大小。然后，光信号监视器可以控制计算的平均光功率CNR和非线性分量。

77. 发明申请

US20160156416A1 OPTICAL TRANSMITTER AND BIAS CONTROL METHOD FOR OPTICAL MODULATOR 有权
标题翻译：光学调制器的光学发射器和偏置控制方法
公开(公告)号：US20160156416A1
公开(公告)日：2016-06-02
申请号：US14934263
申请日：2015-11-06
申请人： Fujitsu Optical Components Limited
发明人： Iori SHIRAKAWA
IPC分类号： H04B10/516 , H04B10/40 , H04B10/564
CPC分类号： H04B10/5161 , H04B10/0799 , H04B10/40 , H04B10/5053 , H04B10/50572 , H04B10/50575 , H04B10/564
摘要： An optical transmitter has an optical modulator having Mach-Zehnder interferometers, modulator drivers configured to drive the optical modulator by a drive signal, a low frequency generator configured to generated a low frequency signal that changes a ratio of a driving amplitude with respect to a half-wave voltage of the optical modulator, a photodetector configured to detect a portion of output light of the optical modulator, a detector configured to detect a low frequency component contained in a detected signal from the photodetector using the low frequency signal, and a bias voltage controller configured to control a bias voltage for the optical modulator such that the detected low frequency component becomes the maximum and in-phase with the superimposed low frequency signal.
摘要翻译：光发射机具有光调制器，其具有马赫 - 策德尔（Mach-Zehnder）干涉仪，调制器驱动器被配置为通过驱动信号驱动光调制器，低频发生器被配置为产生一个低频信号，该低频信号改变驱动幅度相对于一半光调制器的波电压，被配置为检测所述光调制器的输出光的一部分的光电检测器，被配置为使用所述低频信号检测来自所述光检测器的检测信号中包含的低频分量的检测器，以及偏置电压控制器被配置为控制光调制器的偏置电压，使得检测到的低频分量变得与叠加的低频信号最大和同相。

78. 发明申请

US20160036532A1 OPTICAL MODULATOR, OPTICAL TRANSMITTER, OPTICAL TRANSMISSION/RECEPTION SYSTEM, AND CONTROL METHOD FOR OPTICAL MODULATOR 审中-公开
标题翻译：光学调制器，光学发射器，光传输/接收系统和光学调制器的控制方法
公开(公告)号：US20160036532A1
公开(公告)日：2016-02-04
申请号：US14775831
申请日：2013-11-25
申请人： NEC CORPORATION
发明人： Hidemi NOGUCHI
IPC分类号： H04B10/556 , H04B10/564 , H04B10/079
CPC分类号： H04B10/5561 , G02F2001/212 , G02F2203/50 , H04B10/07955 , H04B10/50572 , H04B10/564
摘要： To correct and uniform phase shift at each phase modulation area in an optical modulator in operation. An optical modulation unit outputs a four-level modulated optical signal. A signal distribution circuit outputs signals based on an input digital signal. A drive circuit outputs drive signals from drivers and a calibration driver connected to phase modulation areas and calibration phase modulation areas. A control circuit calibrates amplitudes of the drive signals output from the drivers to coincide with phase shifts by the calibration phase modulation areas according to light intensity of the optical signal.
摘要翻译：在操作中的光调制器中的每个相位调制区域校正和均匀的相移。光调制单元输出四电平调制光信号。信号分配电路根据输入的数字信号输出信号。驱动电路输出来自驱动器的驱动信号和连接到相位调制区域和校准相位调制区域的校准驱动器。控制电路根据光信号的光强度校准从驱动器输出的驱动信号的幅度与由校准相位调制区域相移的相移。

79. 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。

80. 发明授权

US09002145B2 Optical frequency comb generating device and optical pulse generating device using same, and optical frequency comb generating method and optical pulse generating method using same 有权
标题翻译：光频梳发生装置和使用其的光脉冲发生装置，以及光频梳发生方法和使用其的光脉冲产生方法
公开(公告)号：US09002145B2
公开(公告)日：2015-04-07
申请号：US13581364
申请日：2011-02-21
申请人： Masaaki Sudo , Masahito Mure
发明人： Masaaki Sudo , Masahito Mure
IPC分类号： G02F1/035 , H04B10/548 , G02F1/01 , H04B10/50 , G02F1/225 , G02F1/21
CPC分类号： G02F1/0123 , G02F1/2255 , G02F2001/212 , G02F2203/56 , H04B10/5053 , H04B10/50572 , H04B10/50575 , H04B10/50577
摘要： The optical frequency comb generating device having two optical modulation parts 41 and 42 independently modulating optical waves propagating in two branch waveguides and a phase regulator 43 controlling a phase difference between the optical waves includes amplitude adjusting means 22 for adjusting a voltage amplitude of the RF signal supplied to at least one of the optical modulation parts, monitoring means 21 for monitoring the intensity Pout of the output light beam, and a bias control circuit 20 that controls the amplitude adjusting means to change a difference in voltage amplitude between the RF signals supplied to each optical modulation part, that detects a variation of the output light beam corresponding to the variation of the difference in voltage amplitude from the output signal of the monitoring means, and that controls the phase regulator on the basis of the detection result to adjust the phase difference.
摘要翻译：具有独立地调制在两个分支波导中传播的光波的两个光调制部分41和42的光频率梳发生装置和控制光波相位差的相位调节器43包括用于调节RF信号的电压振幅的振幅调节装置22 提供给至少一个光调制部分的监视装置21，用于监视输出光束的强度Pout;以及偏置控制电路20，其控制幅度调整装置，以改变提供给每个光调制部分，其根据监视装置的输出信号检测与电压振幅差异的变化相对应的输出光束的变化，并根据检测结果控制相位调节器，以调整相位区别。

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