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. 发明授权

US11561283B2 Distance measurement apparatus, distance measurement method and program 有权
公开(公告)号：US11561283B2
公开(公告)日：2023-01-24
申请号：US16763206
申请日：2018-11-15
申请人： NEC Corporation
发明人： Akira Tsuji , Junichi Abe , Hidemi Noguchi
IPC分类号： G01S17/10 , G01S17/32 , G01S17/89 , G01S7/481
摘要： A distance measurement apparatus comprises a distance measurement optical signal generation part, a collimating part, a beam diameter change part, an emission direction control part, and a beam diameter change control part. The distance measurement optical signal generation part generates an optical signal for measuring the distance to a target. The collimating part collimates the optical signal. The beam diameter change part is able to change a beam diameter of the collimated light. The emission direction control part controls an emission destination of the collimated light with the diameter changed. The beam diameter change control part controls the changing of the beam diameter by the beam diameter change part according to the emission direction of an outgoing.

2. 发明授权

US10205528B2 Optical transmitter and optical communication method 有权
公开(公告)号：US10205528B2
公开(公告)日：2019-02-12
申请号：US15558799
申请日：2015-03-20
申请人： NEC Corporation
发明人： Emmanuel Le Taillandier De Gabory , Hidemi Noguchi
IPC分类号： H04B10/04 , H04B10/516 , H04B10/588
摘要： It is impossible to compensate non-linearity in an optical transmitter during operations, therefore, an optical transmitter according to an exemplary aspect of the invention includes a selective addition means for adding a coefficient to digital data to be transmitted if the digital data being included in one of data intervals of predetermined number, the predetermined number being integer more than one, and for changing the coefficient with a period longer than the symbol period of the data transmitted by the optical transmitter; a data processing means for processing the digital data by using a parameter; a driving signal means for generating a driving signal from the digital data adjusted by the selective addition means and the data processing means; a modulating means for modulating light into lightwave signal by the driving signal; and a control means for receiving a monitor signal obtained by monitoring the lightwave signal having a frequency component determined by the period of changing the added coefficients, and for modifying the parameter of the data processing means in order for the monitor signal to reach an extremum.

3. 发明授权

US09413467B2 Optical transmitter, optical transmission/reception system, and drive circuit 有权
标题翻译：光发射机，光传输/接收系统和驱动电路
公开(公告)号：US09413467B2
公开(公告)日：2016-08-09
申请号：US14387005
申请日：2012-11-06
申请人： NEC Corporation
发明人： Hidemi Noguchi
IPC分类号： H04B10/50 , H04B10/556 , G02F1/01 , G02F1/225 , H04B10/27
CPC分类号： H04B10/5561 , G02F1/0121 , G02F1/2255 , H04B10/27
摘要： An optical modulator includes optical waveguides on which phase modulation regions are formed. A drive circuit includes a lower-bit drive unit, an upper-bit drive unit, and a bit splitting unit. The bit splitting unit splits an input digital signal into upper bits and lower bits. The lower-bit drive unit outputs a value obtained by performing D/A conversion on the lower bits to phase modulation regions. The upper-bit drive unit outputs, to phase modulation regions, a value greater than a maximum value of values output from the lower-bit drive unit, or a minimum value of the values output from the lower-bit drive unit, according to a value of the upper bits.
摘要翻译：光调制器包括其上形成有相位调制区域的光波导。驱动电路包括下位驱动单元，高位驱动单元和分位单元。分位单元将输入数字信号分为高位和低位。低位驱动单元通过对低位到相位调制区域进行D / A转换而得到的值。高位驱动单元向相位调制区域输出大于从低位驱动单元输出的值的最大值或从低位驱动单元输出的值的最小值的值，根据高位数值。

4. 发明授权

US09319145B2 Optical transmitter, optical transmission/reception system, and drive circuit 有权
标题翻译：光发射机，光传输/接收系统和驱动电路
公开(公告)号：US09319145B2
公开(公告)日：2016-04-19
申请号：US14387021
申请日：2012-11-06
申请人： NEC Corporation
发明人： Hidemi Noguchi
IPC分类号： H04B10/556 , H04B10/548 , H04B10/40 , G02F1/01 , G02F1/21
CPC分类号： H04B10/548 , G02F1/0121 , G02F2001/212 , G02F2201/16 , H04B10/40
摘要： The present invention provides an optical transmitter, an optical transmission/reception system, and a drive circuit, which are capable of adjusting linearity of signal intensity of output light. The optical transmitter includes an optical transmission lines through which an optical signal propagates, phase modulation regions being formed on the optical transmission line. A decoder decodes an input digital signal and outputs signals according to a decoded value. A drive circuit outputs drive signals level of which is equal to or more than three to the each of the plurality of phase modulation regions based on the signals. A control circuit adjusts full-scale amplitude of each of the drive signals by controlling the drive circuit.
摘要翻译：本发明提供能够调节输出光的信号强度的线性度的光发送器，光发送/接收系统和驱动电路。光发射机包括光传输线，光信号传播的光传输线，形成在光传输线上的相位调制区。解码器解码输入数字信号并根据解码值输出信号。基于该信号，驱动电路向多个相位调制区域中的每一个输出等于或大于三的驱动信号电平。控制电路通过控制驱动电路来调整每个驱动信号的满量程幅度。

5. 发明申请

US20150110500A1 MACH-ZEHNDER TYPE OPTICAL MODULATOR, OPTICAL TRANSMISSION/RECEPTION SYSTEM AND CONTROL METHOD OF MACH-ZEHNDER TYPE OPTICAL MODULATOR 有权
标题翻译： MACH-ZEHNDER型光学调制器，光传输/接收系统和MACH-ZEHNDER型光学调制器的控制方法
公开(公告)号：US20150110500A1
公开(公告)日：2015-04-23
申请号：US14394313
申请日：2013-04-03
申请人： NEC CORPORATION
发明人： Hidemi Noguchi
IPC分类号： G02F1/225 , H04B10/25 , H04B10/54 , G02F1/01
CPC分类号： G02F1/225 , G02F1/0121 , G02F1/0316 , G02F2001/212 , G02F2201/126 , G02F2201/16 , H04B10/25 , H04B10/541
摘要： A Mach-Zehnder type optical modulator according to the present invention is characterized by: that it comprises a beam splitting unit for splitting input light into two component light beams, a first waveguide and a second waveguide for guiding respective ones of the split component light beams, a beam combining unit for combining together the component light beams guided respectively by the first and second waveguides and outputting the combined light, a plurality of electrodes which are formed into electrode pairs as a result of being arranged on the first and second waveguides in a symmetric and parallel manner, and driving units for differentially driving respective ones of the electrode pairs in accordance with the magnitude relationships between the voltage of an input signal and respective ones of threshold voltages set individually for the electrode pairs; and that, by thus being driven differentially, the plurality of electrodes each apply a voltage for modulating the input light to the waveguide on which they are arranged.
摘要翻译：根据本发明的马赫 - 曾德尔型光调制器的特征在于：它包括用于将输入光分成两个分量光束的分束单元，第一波导和第二波导，用于引导分离成分光束，光束组合单元，用于将由第一和第二波导分别引导并分别组合的组分光束组合在一起;多个电极，其形成为电极对，作为布置在第一和第二波导中的结果以及用于根据输入信号的电压和针对电极对单独设定的各个阈值电压之间的大小关系差分地驱动相应电极对的驱动单元; 并且通过这样驱动差分地，多个电极各自施加用于将输入光调制到其上布置的波导的电压。

6. 发明公开

US20240129041A1 OPTICAL RELAY APPARATUS, OPTICAL TRANSMISSION SYSTEM, AND OPTICAL RELAY METHOD 审中-公开
公开(公告)号：US20240129041A1
公开(公告)日：2024-04-18
申请号：US18277732
申请日：2021-02-26
申请人： NEC Corporation
发明人： Hidemi Noguchi
IPC分类号： H04B10/532 , H04B10/40 , H04B10/61
CPC分类号： H04B10/532 , H04B10/40 , H04B10/6162
摘要： An optical transceiver (101) of an optical relay apparatus includes: a coherent reception front-end unit (110) that coherently detects an input optical signal to be input, based on local oscillation light, and outputs the coherently detected first analog electric signal; a coherent transmission front-end unit (120) that coherently modulates a second analog electric signal acquired by turning around the first analog electric signal, based on transmission light, and outputs the coherently modulated output optical signal; and an analog compensation unit (130) that performs analog signal processing on the first analog electric signal in such a way as to compensate for signal quality according to a signal characteristic between an input of the coherent reception front-end unit (110) and an output of the coherent transmission front-end unit (120), and thereby generates the second analog electric signal.

7. 发明公开

US20230412297A1 OPTICAL AMPLIFIER, OPTICAL AMPLIFIER CONTROLLING METHOD, AND OPTICAL TRANSMISSION SYSTEM 审中-公开
公开(公告)号：US20230412297A1
公开(公告)日：2023-12-21
申请号：US18031208
申请日：2020-10-26
申请人： NEC Corporation
发明人： Keiichi MATSUMOTO , Hitoshi Takeshita , Hidemi Noguchi , Emmanuel Le Taillandier de Gabory
IPC分类号： H04J14/02 , H01S3/067
CPC分类号： H04J14/02216 , H01S3/06754 , H04J14/0212
摘要： An optical amplifier that amplifies an incident WDM signal and includes cores having an amplification medium, the optical amplifier includes: a wavelength demultiplexer configured to demultiplex the incident WDM signal into wavelength bands and introducing the demultiplexed WDM signals into the cores separately; a wavelength multiplexer configured to multiplex amplified optical signals propagated through the cores and outputting the multiplexed signal; and an wavelength demultiplexing controller configured to monitor an amplification rate of a specific wavelength band of an amplified WDM signal or a scale associated with an amplification rate of a specific wavelength band, demultiplexing, from the incident WDM signal, an optical signal of a wavelength band having relatively-small optical amplification efficiency according to a monitoring result, and controlling demultiplexing performed by the wavelength demultiplexer in such a way as to amplify, with a relatively-large amplification rate, the optical signal of the wavelength band having relatively-small optical amplification efficiency.

8. 发明公开

US20230327767A1 OPTICAL TRANSMISSION SYSTEM, AND OPTICAL TRANSMISSION METHOD 审中-公开
公开(公告)号：US20230327767A1
公开(公告)日：2023-10-12
申请号：US18025109
申请日：2020-09-11
申请人： NEC Corporation
发明人： Hitoshi Takeshita , Keiichi Matsumoto , Hidemi Noguchi , Kohei Hosokawa
IPC分类号： H04B10/291 , H01S3/067 , H01S3/094
CPC分类号： H04B10/2912 , H01S3/094003 , H01S3/06737
摘要： The optical transmission system of the present invention includes a multi-core transmission path which includes a plurality of cores, and in which optical signals propagate through the plurality of cores, a first optical repeating means for amplifying the optical signals by individually exciting first multi-core optical amplification mediums, and a second optical repeating means for amplifying the optical signals by collectively exciting second multi-core optical amplification mediums, wherein the first optical repeating means is positioned spaced apart from the second optical repeating means by a distance determined on the basis of either a first transmissible distance due to the first optical repeating means and a second transmissible distance due to the second optical repeating means.

9. 发明申请

US20230047836A1 MONITORING DEVICE, MONITORING METHOD, OPTICAL AMPLIFIER, AND OPTICAL TRANSMISSION SYSTEM 有权
公开(公告)号：US20230047836A1
公开(公告)日：2023-02-16
申请号：US17797959
申请日：2021-02-15
申请人： NEC Corporation
发明人： Keiichi Matsumoto , Hidemi Noguchi
IPC分类号： H01S3/067 , H01S3/13 , G02B6/02
摘要： Provided are a monitoring device, a monitoring method, an optical amplifier, and an optical transmission system that are adapted for an increase in the number of cores in a multi-core optical fiber transmission path, and that are suitable for crosstalk monitoring. The monitoring device monitors a multi-core optical fiber transmission path comprising a plurality of use core and at least one or more non-use cores. The monitoring device comprises: an applying means for applying dithering to signal light propagating in the use cores; a monitoring means for monitoring the power of the non-use cores; and a separating means for separating a monitoring result from the monitoring means into power components from the plurality of use cores.

10. 发明授权

US10790901B2 Reception device, transmission device, optical communication system, and optical communication method 有权
公开(公告)号：US10790901B2
公开(公告)日：2020-09-29
申请号：US16470652
申请日：2017-12-19
申请人： NEC Corporation
发明人： Hidemi Noguchi
IPC分类号： H04B10/079 , H04B10/69 , H04J14/02 , H04B10/07 , H04B10/66 , H04B10/25 , H04B10/40 , H04B10/43
摘要： A reception device 20 is configured to include a separation means 21 and a plurality of optical reception means 22. Each optical reception means 22 is configured to further include an optical/electrical conversion means 23 and a band restoration means 24. The separation means 21 separates a multiplexed signal into which signals of respective channels to which spectral shaping that narrows bandwidth to less than or equal to a baud rate is applied are multiplexed at spacings less than or equal to the baud rate on the transmission side into optical signals for the respective channels. Each optical/electrical conversion means 23 converts an optical signal to an electrical signal as a reception signal. Each band restoration means 24 applies processing having inverse characteristics to those of the band narrowing filter processing to the reception signal and restores the band of the reception signal.

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