专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明申请

US20180219631A1 OPTICAL COMMUNICATION APPARATUS AND OPTICAL COMMUNICATION SYSTEM 审中-公开
公开(公告)号：US20180219631A1
公开(公告)日：2018-08-02
申请号：US15876701
申请日：2018-01-22
申请人： FUJITSU LIMITED
发明人： Takashi Shiraishi
IPC分类号： H04B10/50 , H01S3/067 , H01S3/094
CPC分类号： H04B10/50577 , H01S3/06779 , H01S3/094042 , H04B10/504 , H04B10/50572 , H04B10/564
摘要： An optical communication apparatus includes: a light-receiving device that receives an optical signal transmitted from another optical communication apparatus through an optical fiber and converts the optical signal into an electrical signal; a first measurement circuit that measures an average power and a modulation power of the optical signal based on the electrical signal; a light-emitting device that transmits the optical signal to the another optical communication apparatus by emitting light in accordance with a driving current; a driver that causes the light-emitting device to transmit the optical signal according to a transmission signal by controlling the driving current based on the transmission signal; and a processor that adjusts the driving current based on the average power and the modulation power.

2. 发明授权

US10038516B2 Spectral inversion detection for polarization-division multiplexed optical transmission 有权
公开(公告)号：US10038516B2
公开(公告)日：2018-07-31
申请号：US15529027
申请日：2015-12-02
申请人： Xieon Networks S.à.r.l.
发明人： Stefano Calabro , Bernhard Spinnler
IPC分类号： H04B10/00 , H04J14/06 , G02F1/225 , H04B10/50 , G02F1/21
CPC分类号： H04J14/06 , G02F1/0123 , G02F1/2255 , G02F2001/212 , G02F2201/58 , G02F2203/07 , H04B10/5053 , H04B10/50572
摘要： Disclosed herein is a modulator (50) for polarization-division multiplexing (PDM) transmission. The modulator (50) comprises first and second DP-MZMs (12, 28) associated with first and second polarizations, each DP-MZM (12, 28) having an input for an in-phase and a quadrature driving signal for modulating the in-phase and quadrature components of an optical signal according to respective transfer functions, and a detector (58) suitable for detecting light comprising at least a portion of the light outputted by the first DP-MZM (12) and a portion of the light outputted by the second DP-MZM (28). The modulator (50) is adapted to superimpose a first pilot signal on one of the in-phase and quadrature driving signals of the first DP-MZM (12) and on one of the in-phase and quadrature driving signals of the second DP-MZM (28), and a second pilot signal on the respective other of the in-phase and quadrature driving signals of the first and second DP-MZMs (12, 28). Further, the first and second pilot signals are chosen such that the signal detected by said detector (58) is indicative as to whether the slopes of the transfer functions are different for the in-phase and quadrature components of one of the first and second DP-MZMs (12, 28) and identical for the other of the first and second DP-MZMs (12, 28).

3. 发明授权

US09941970B2 Adaptive mach zehnder modulator linearization 有权
公开(公告)号：US09941970B2
公开(公告)日：2018-04-10
申请号：US15223724
申请日：2016-07-29
申请人： INPHI CORPORATION
发明人： Hari Shankar
IPC分类号： H04B10/516 , H04B10/588 , H04B10/2575 , H04B10/50
CPC分类号： H04B10/516 , H04B10/2575 , H04B10/50572 , H04B10/50593 , H04B10/588
摘要： The present invention is directed to optical communication systems and methods thereof. In various embodiments, the present invention provides method for linearizing Mach Zehnder modulators by digital pre-compensation and adjusting the gain of the driver and/or the modulation index. The pre-compensation can be implemented as a digital pre-compensation algorithm, which is a part of an adaptive feedback loop. There are other embodiments as well.

4. 发明授权

US09787395B2 Control apparatus and method for monitoring optical fiber link 有权
公开(公告)号：US09787395B2
公开(公告)日：2017-10-10
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 , H04B10/50 , H04B10/564
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.

5. 发明申请

US20170264389A1 SPECTRAL INVERSION DETECTION FOR POLARIZATION-DIVISION MULTIPLEXED OPTICAL TRANSMISSION 审中-公开
公开(公告)号：US20170264389A1
公开(公告)日：2017-09-14
申请号：US15529027
申请日：2015-12-02
申请人： Xieon Networks S.à.r.l.
发明人： Stefano CALABRO , Bernhard SPINNLER
IPC分类号： H04J14/06 , H04B10/50 , G02F1/225
CPC分类号： H04J14/06 , G02F1/0123 , G02F1/2255 , G02F2001/212 , G02F2201/58 , G02F2203/07 , H04B10/5053 , H04B10/50572
摘要： Disclosed herein is a modulator (50) for polarization-division multiplexing (PDM) transmission. The modulator (50) comprises first and second DP-MZMs (12, 28) associated with first and second polarizations, each DP-MZM (12, 28) having an input for an in-phase and a quadrature driving signal for modulating the in-phase and quadrature components of an optical signal according to respective transfer functions, and a detector (58) suitable for detecting light comprising at least a portion of the light outputted by the first DP-MZM (12) and a portion of the light outputted by the second DP-MZM (28). The modulator (50) is adapted to superimpose a first pilot signal on one of the in-phase and quadrature driving signals of the first DP-MZM (12) and on one of the in-phase and quadrature driving signals of the second DP-MZM (28), and a second pilot signal on the respective other of the in-phase and quadrature driving signals of the first and second DP-MZMs (12, 28). Further, the first and second pilot signals are chosen such that the signal detected by said detector (58) is indicative as to whether the slopes of the transfer functions are different for the in-phase and quadrature components of one of the first and second DP-MZMs (12, 28) and identical for the other of the first and second DP-MZMs (12, 28).

6. 发明申请

US20160112139A1 OPTICAL SIGNAL PROCESSING APPARATUS, OPTICAL SIGNAL PROCESSING METHOD, AND RECORDING MEDIUM 有权
标题翻译：光信号处理装置，光信号处理方法和记录介质
公开(公告)号：US20160112139A1
公开(公告)日：2016-04-21
申请号：US14982058
申请日：2015-12-29
申请人： FUJITSU LIMITED
发明人： Toshiki Tanaka , Tomoo Takahara , MASATO NISHIHARA
IPC分类号： H04B10/516 , H04L27/26
CPC分类号： H04B10/516 , H03F1/32 , H04B10/0779 , H04B10/504 , H04B10/50572 , H04B10/50575 , H04B10/548 , H04L25/03343 , H04L27/26 , H04L27/2601 , H04L27/2602
摘要： An optical transmitter includes a discrete multi-tone (DMT) modulation unit that modulates a carrier signal having a specific frequency with an information signal and a carrier signal having a frequency different from the specific frequency with a monitor signal, to generate a DMT modulation signal that multiplexes the information signal and the monitor signal. The optical transmitter includes a laser diode (LD) unit that optically converts the DMT modulation signal to a corresponding optical DMT modulation signal, a frequency extraction unit that extracts a harmonic distortion component of the monitor signal from the optical DMT modulation signal, and a frequency analysis unit. The optical transmitter includes a bias control unit that controls a bias supply unit that adjusts a bias value to be supplied to the LD unit such that the extracted harmonic distortion component of the monitor signal is reduced.
摘要翻译：一种光发射机包括一个离散多音调（DMT）调制单元，用一个信号信号和一个具有与特定频率不同的频率的载波信号用监视信号调制具有特定频率的载波信号，以产生一个DMT调制信号信号信号和监视信号进行复用。光发射机包括激光二极管（LD）单元，其将DMT调制信号光学地转换成相应的光DMT调制信号，频率提取单元，从光DMT调制信号中提取监视信号的谐波失真分量，频率分析单位。光发射机包括偏置控制单元，其控制偏置电源单元，该偏置电源单元调节要提供给LD单元的偏置值，使得监视信号的提取的谐波失真分量减小。

7. 发明申请

US20160105244A1 OPTICAL TRANSMITTER, METHOD FOR CONTROLLING OPTICAL MODULATOR, AND CONTROLLER FOR OPTICAL MODULATOR 有权
标题翻译：光学发射器，光学调制器控制方法和光调制器控制器
公开(公告)号：US20160105244A1
公开(公告)日：2016-04-14
申请号：US14877047
申请日：2015-10-07
申请人： FUJITSU LIMITED
发明人： YUICHI AKIYAMA
IPC分类号： H04B10/54
CPC分类号： H04B10/50572 , G02F1/01 , G02F1/225 , H04B10/5053 , H04B10/588
摘要： An optical transmitter includes an optical modulator that is driven by a driving signal, an acquisition part, and a controller. The acquisition part obtains a relationship between a fluctuation of a parameter to adjust the driving signal and a fluctuation of a state of output light from the optical modulator due to the fluctuation of the parameter. The controller controls an amplitude of the driving signal on the basis of the obtained relationship.
摘要翻译：光发射机包括由驱动信号驱动的光调制器，采集部分和控制器。获取部分由于参数的波动而获得用于调节驱动信号的参数的波动和来自光调制器的输出光的状态的波动之间的关系。控制器根据获得的关系控制驱动信号的幅度。

8. 发明授权

US09300405B2 Closed loop optical modulation amplitude control 有权
标题翻译：闭环光调制幅度控制
公开(公告)号：US09300405B2
公开(公告)日：2016-03-29
申请号：US14011022
申请日：2013-08-27
申请人： Semtech Corporation
发明人： Jonah Nuttgens
IPC分类号： H04B10/50 , H01S5/00 , H04B10/564
CPC分类号： H04B10/50572 , H04B10/504 , H04B10/564
摘要： Systems and methods are provided for a low frequency AC comparison circuit. The low frequency AC comparison circuit includes circuitry configured to receive a monitoring signal generated by an optical detector, the monitoring signal being proportional to an amount of light generated by an optical transmission device that transmits based on a data signal that is received by an optical driver. The comparison circuit is further configured to generate a modulation current control signal that is transmitted to the optical driver based on a comparison of a low frequency AC component of the monitoring signal and a correlated low frequency AC component of the data signal.
摘要翻译：为低频AC比较电路提供系统和方法。所述低频AC比较电路包括被配置为接收由光学检测器产生的监视信号的电路，所述监视信号与由基于由光学驱动器接收的数据信号发送的光传输设备产生的光量成比例。比较电路还被配置为基于监视信号的低频AC分量与数据信号的相关的低频AC分量的比较，生成被发送到光驱动器的调制电流控制信号。

9. 发明授权

US09217908B2 Optical modulator 有权
标题翻译：光调制器
公开(公告)号：US09217908B2
公开(公告)日：2015-12-22
申请号：US14250636
申请日：2014-04-11
申请人： SUMITOMO ELECTRIC INDUSTRIES, LTD.
发明人： Naoya Kono
IPC分类号： G02F1/035 , G02F1/225 , G02F1/21
CPC分类号： G02F1/225 , G02F1/2255 , G02F1/2257 , G02F2001/212 , G02F2203/19 , G02F2203/20 , G02F2203/25 , H04B10/5053 , H04B10/50572 , H04B10/50575
摘要： An optical modulator includes main input and output ports; first and second Mach-Zehnder modulators; a first branching waveguide optically coupling the main input port to the first and second Mach-Zehnder modulators; a first driver circuit connected to the first Mach-Zehnder modulator, the first driver circuit generating a first drive signal having a first amplitude at a first bias point; and a second driver circuit connected to the second Mach-Zehnder modulator, the second driver circuit generating a second drive signal having a second amplitude at a second bias point. The first and second drive signals satisfy at least one of a first condition and a second condition. The first condition is that the first amplitude differs from the second amplitude. The second condition is that the first bias point differs from the second bias point.
摘要翻译：光调制器包括主输入和输出端口; 第一和第二马赫 - 曾德调制器; 第一分支波导将主输入端口光耦合到第一和第二马赫 - 曾德调制器; 连接到第一马赫 - 策德尔调制器的第一驱动器电路，第一驱动电路产生在第一偏置点处具有第一幅度的第一驱动信号; 以及连接到第二马赫 - 策德尔调制器的第二驱动电路，所述第二驱动电路在第二偏置点处产生具有第二幅度的第二驱动信号。第一和第二驱动信号满足第一条件和第二条件中的至少一个。第一个条件是第一幅度与第二幅度不同。第二个条件是第一偏置点与第二偏置点不同。

10. 发明授权

US09020361B2 Optical signal transmitter, and bias voltage control method 有权
公开(公告)号：US09020361B2
公开(公告)日：2015-04-28
申请号：US13393101
申请日：2010-09-07
申请人： Hiroto Kawakami , Eiji Yoshida , Masahiro Tachibana
发明人： Hiroto Kawakami , Eiji Yoshida , Masahiro Tachibana
IPC分类号： H04B10/04 , G02F1/01 , H04B10/50
CPC分类号： G02F1/0123 , H04B10/5053 , H04B10/5057 , H04B10/50572 , H04B10/50575 , H04B10/5561
摘要： An optical signal transmitter of the present invention includes: two phase modulating portions; a phase shifter which displaces carrier phases of two output lights from the phase modulating portions by π/2; a multiplexing portion which multiplexes two signal lights, carrier phases of the two signal lights being made orthogonal to each other by the phase shifter; a drive signal electrode portion which supplies a differential data signal to each of four paths of interference optical waveguides, each of the two phase modulating portions having the interference optical waveguides, the differential data signal having an amplitude which is equal to a half-wave voltage Vπ of the two phase modulating portions; a drive amplifier which amplifies the differential data signal to be supplied to each of the four paths of the interference optical waveguides; a data bias electrode portion which supplies a total of four data bias voltages to two arms, each of the two phase modulating portions having the two arms; an orthogonal bias electrode portion which supplies an orthogonal bias voltage to the phase shifter; a data bias power supply portion that adjusts delay times in the two phase modulating portions by applying the data bias voltages to the data bias electrode portion; an orthogonal bias power supply portion that adjusts a delay amount relative to a light output from at least one of the two phase modulating portions by applying the orthogonal bias voltage to the orthogonal bias electrode portion; a dither signal adding portion that adds a dither signal to at most three of the four data bias voltages; a dither detecting portion which detects a wave that is n-times a dither component from an output of the multiplexing portion (where n is an integer equal to or greater than one); and an orthogonal bias control portion which feeds back a detection result of the dither detecting portion to the orthogonal bias power supply portion. The orthogonal bias power supply portion adjusts the delay amount relative to the light output from at least one of the two phase modulating portions by controlling the orthogonal bias voltage to be applied to the orthogonal bias electrode portion based on feedback from the orthogonal bias control portion.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式