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1. 发明授权

US09564964B2 Optical signal processing device, 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：US09564964B2
公开(公告)日：2017-02-07
申请号：US14294722
申请日：2014-06-03
申请人： FUJITSU LIMITED , FUJITSU TELECOM NETWORKS LIMITED
发明人： Taku Saito , Katsumi Fukumitsu , Osamu Takeuchi , Hirofumi Araki , Kanji Naito , Shoichi Murakami
IPC分类号： H04B10/60 , H04B10/079 , H04B10/61 , H04L27/22 , H04L27/20
CPC分类号： H04B10/0795 , H04B10/6165 , H04L27/2053 , H04L27/223
摘要： An optimization unit in an optical receiver divides a symbol region out of a plurality of symbol regions into which signal points that specifies symbol information included in an optical signal are classified, into a plurality of division regions from the symbol center coordinate of the symbol region. Moreover, the optimization unit accumulates the signal points of the symbol information for every division region in the symbol region. Furthermore, based on the accumulated number of signal points for every division region, the optimization unit controls the average length of a phase estimation unit when the phase noise of the optical signal is calculated.
摘要翻译：光接收器中的优化单元将指定包括在光信号中的符号信息的信号点的多个符号区域中的符号区域从符号区域的符号中心坐标分割成多个划分区域。此外，优化单元对于符号区域中的每个划分区域累积符号信息的信号点。此外，基于每个划分区域的信号点的累计数，当计算出光信号的相位噪声时，优化单元控制相位估计单元的平均长度。

2. 发明授权

US09882647B2 Optical transmission apparatus, optical transmission system, and polarization dependent loss monitor 有权
公开(公告)号：US09882647B2
公开(公告)日：2018-01-30
申请号：US15013190
申请日：2016-02-02
申请人： FUJITSU LIMITED
发明人： Taketo Endo , Kosuke Komaki , Taku Saito , Hirofumi Araki , Makoto Shimizu , Hiroshi Nishida
IPC分类号： H04B10/08 , H04B17/00 , H04B10/06 , H04B10/50 , H04B10/079 , H04L25/03
CPC分类号： H04B10/50 , H04B10/0795 , H04B10/612 , H04B10/614 , H04B10/6162 , H04J14/02 , H04L25/03343
摘要： An optical transmission apparatus includes: a coherent detector configured to receive light including different polarization components from an optical transmission path, and perform coherent detection of received light including the different polarization components; an adaptive equalizer configured to adaptively equalize, by a digital filter, a complex electric signal for each of the polarization components obtained by the coherent detection, a gain value for controlling an amplitude of the complex electric signal being applied to the complex electric signal; and a polarization dependent loss monitor configured to determine a polarization dependent loss of the optical transmission path, based on a correction filter parameter obtained by correcting a filter parameter of the digital filter according to the gain value, the filter parameter being adaptively updated by an adaptive equalization of the adaptive equalizer.

3. 发明授权

US09407471B2 Adaptive equalizer tap coefficient correction method and optical receiver 有权
标题翻译：自适应均衡器抽头系数校正方法和光接收器
公开(公告)号：US09407471B2
公开(公告)日：2016-08-02
申请号：US14082521
申请日：2013-11-18
申请人： FUJITSU LIMITED
发明人： Taku Saito , Nobukazu Koizumi , Hisao Nakashima , Osamu Takeuchi , Hirofumi Araki
IPC分类号： H04L25/03 , H04B10/60
CPC分类号： H04L25/03 , H04B10/60 , H04L25/03044
摘要： A method of tap coefficient correction includes: obtaining a synchronization symbol difference between a first polarization and a second polarization orthogonal to the first polarization; obtaining a delay amount of each of the first polarization and the second polarization in an adaptive equalizer; calculating, in a case where a horizontal axis represents a tap number and a vertical axis represents a tap coefficient and a tap number or a nearest tap number with which an area of a drawn figure is halved is set as a gravity center of tap coefficients, a correction reference gravity center of the tap coefficients set in the adaptive equalizer, based on the synchronization symbol difference and the delay amount; and performing a correction of shifting an entire tap coefficients in units of symbol to cause the correction reference gravity center to be closest to a tap center.
摘要翻译：抽头系数校正的方法包括：获得与第一偏振正交的第一偏振和第二偏振之间的同步符号差; 在自适应均衡器中获得第一偏振和第二偏振中的每一个的延迟量; 在水平轴表示抽头数，垂直轴表示抽头数字的面积减半的抽头系数和抽头数或抽头数或最近抽头数的情况下，计算出抽头系数的重心，基于同步符号差和延迟量，在自适应均衡器中设置的抽头系数的校正基准重心; 并且执行以符号为单位移位整个抽头系数的校正，以使校正基准重心最靠近抽头中心。

4. 发明申请

US20140212132A1 ADAPTIVE EQUALIZER TAP COEFFICIENT CORRECTION METHOD AND OPTICAL RECEIVER 有权
标题翻译：自适应均衡器标度系数校正方法和光接收机
公开(公告)号：US20140212132A1
公开(公告)日：2014-07-31
申请号：US14082521
申请日：2013-11-18
申请人： FUJITSU LIMITED
发明人： Taku Saito , Nobukazu Koizumi , Hisao Nakashima , Osamu Takeuchi , Hirofumi Araki
IPC分类号： H04B10/69
CPC分类号： H04L25/03 , H04B10/60 , H04L25/03044
摘要： A method of tap coefficient correction includes: obtaining a synchronization symbol difference between a first polarization and a second polarization orthogonal to the first polarization; obtaining a delay amount of each of the first polarization and the second polarization in an adaptive equalizer; calculating, in a case where a horizontal axis represents a tap number and a vertical axis represents a tap coefficient and a tap number or a nearest tap number with which an area of a drawn figure is halved is set as a gravity center of tap coefficients, a correction reference gravity center of the tap coefficients set in the adaptive equalizer, based on the synchronization symbol difference and the delay amount; and performing a correction of shifting an entire tap coefficients in units of symbol to cause the correction reference gravity center to be closest to a tap center.
摘要翻译：抽头系数校正的方法包括：获得与第一偏振正交的第一偏振和第二偏振之间的同步符号差; 在自适应均衡器中获得第一偏振和第二偏振中的每一个的延迟量; 在水平轴表示抽头数，垂直轴表示抽头数字的面积减半的抽头系数和抽头数或抽头数或最近抽头数的情况下，计算出抽头系数的重心，基于同步符号差和延迟量，在自适应均衡器中设置的抽头系数的校正基准重心; 并且执行以符号为单位移位整个抽头系数的校正，以使校正基准重心最靠近抽头中心。

5. 发明申请

US20190149258A1 TRANSMISSION AND RECEPTION APPARATUS, OPTICAL TRANSMISSION APPARATUS AND OPTIMIZATION METHOD FOR PLUGGABLE INTERFACE 审中-公开
公开(公告)号：US20190149258A1
公开(公告)日：2019-05-16
申请号：US16191696
申请日：2018-11-15
申请人： FUJITSU LIMITED
发明人： Hirofumi Araki , Hisayuki Ojima , Yasushi YOSHINO , Satoru Saitoh , KAZUYA IKEDA , TAICHI ISHIKAWA
IPC分类号： H04J14/02 , H04B10/079
摘要： A transmission and reception apparatus, includes a processor and a processing device coupled to the processor, wherein the processor is configured to detect insertion of a pluggable module, issue, when the insertion of the pluggable module is detected, an instruction to the processing device to generate a first test signal to be supplied to the pluggable module, extract an alternating current component from a first monitoring result of the first test signal by the pluggable module and acquiring pulse width information at a plurality of phase points, and set a phase point determined based on the pulse width information as an optimum phase value to the processing device.

6. 发明授权

US09667346B2 Optical transmission system, wavelength control method and node 有权
公开(公告)号：US09667346B2
公开(公告)日：2017-05-30
申请号：US14987106
申请日：2016-01-04
申请人： FUJITSU LIMITED
发明人： Hirofumi Araki , Taku Saito , Yoshitaka Taki , Satoru Miyazaki
IPC分类号： H04B10/00 , H04B10/572 , H04B10/079 , H04J14/02
CPC分类号： H04B10/572 , H04B10/07957 , H04J14/02
摘要： An optical transmission system includes: a transmission node to transmit wavelength-multiplexed light of a plural wavelengths arranged in a predetermined transmission band; and a reception node to receive the wavelength-multiplexed light, and to include a monitor to monitor a detection sensitivity indicating a sampling phase shift with respect to a phase of light corresponding to one among the received plural wavelengths, and a transmitter to transmit information indicating that the monitored detection sensitivity for light corresponding to a wavelength adjacent to an outer edge of the transmission band, among the plural wavelengths, has been reduced below a threshold value, to the transmission node, wherein the transmission node includes a receiver to receive information indicating a reduction in the detection sensitivity, and a controller to stop wavelength control of shifting the wavelength adjacent to the outer edge in a direction approaching the outer edge in response to reception of the information.

7. 发明申请

US20160204875A1 OPTICAL TRANSMISSION SYSTEM, WAVELENGTH CONTROL METHOD AND NODE 有权
标题翻译：光传输系统，波长控制方法和节点
公开(公告)号：US20160204875A1
公开(公告)日：2016-07-14
申请号：US14987106
申请日：2016-01-04
申请人： FUJITSU LIMITED
发明人： Hirofumi Araki , Taku Saito , Yoshitaka Taki , Satoru Miyazaki
IPC分类号： H04B10/572 , H04J14/02 , H04B10/079
CPC分类号： H04B10/572 , H04B10/07957 , H04J14/02
摘要： An optical transmission system includes: a transmission node to transmit wavelength-multiplexed light of a plural wavelengths arranged in a predetermined transmission band; and a reception node to receive the wavelength-multiplexed light, and to include a monitor to monitor a detection sensitivity indicating a sampling phase shift with respect to a phase of light corresponding to one among the received plural wavelengths, and a transmitter to transmit information indicating that the monitored detection sensitivity for light corresponding to a wavelength adjacent to an outer edge of the transmission band, among the plural wavelengths, has been reduced below a threshold value, to the transmission node, wherein the transmission node includes a receiver to receive information indicating a reduction in the detection sensitivity, and a controller to stop wavelength control of shifting the wavelength adjacent to the outer edge in a direction approaching the outer edge in response to reception of the information.
摘要翻译：光传输系统包括：传输节点，用于发送以预定传输频带布置的多个波长的波分复用光; 以及接收波长复用光的接收节点，并且包括监视器，用于监视指示相对于接收的多个波长中的一个的相位的相位的采样相移的检测灵敏度，以及发送器，用于发送指示将与多个波长内的发送频带的外边缘相邻的波长的光的监视检测灵敏度降低到低于阈值的发送节点，其中，发送节点包括：接收器，用于接收指示检测灵敏度的降低，以及控制器，用于响应于接收到信息，停止在接近外边缘的方向上移动与外边缘相邻的波长的波长控制。

8. 发明授权

US09722704B2 Optical transmission apparatus and method for controlling optical power 有权
公开(公告)号：US09722704B2
公开(公告)日：2017-08-01
申请号：US15012000
申请日：2016-02-01
申请人： FUJITSU LIMITED
发明人： Taku Saito , Kosuke Komaki , Taketo Endo , Shuzo Matsushita , Hirofumi Araki , Hiroshi Nishida , Makoto Shimizu
IPC分类号： H04B10/40 , H04B10/079 , H04B10/67 , H04J14/02
CPC分类号： H04B10/40 , H04B10/07955 , H04B10/674 , H04J14/021
摘要： An optical transmission apparatus includes: an optical receiver configured to receive an optical signal; a variable optical attenuator configured to adjust a power of the optical signal to be input to the optical receiver according to a variable attenuation amount; and a controller configured to control the attenuation amount of the variable optical attenuator based on an electrical signal obtained by performing a coherent detection and a photoelectric conversion on the optical signal received by the optical receiver.

9. 发明申请

US20160248513A1 OPTICAL TRANSMISSION APPARATUS AND METHOD FOR CONTROLLING OPTICAL POWER 有权
标题翻译：光传输装置和控制光功率的方法
公开(公告)号：US20160248513A1
公开(公告)日：2016-08-25
申请号：US15012000
申请日：2016-02-01
申请人： FUJITSU LIMITED
发明人： Taku Saito , Kosuke Komaki , Taketo Endo , Shuzo Matsushita , Hirofumi Araki , Hiroshi Nishida , Makoto Shimizu
IPC分类号： H04B10/40 , H04B10/079 , H04B10/564
CPC分类号： H04B10/40 , H04B10/07955 , H04B10/674 , H04J14/021
摘要： An optical transmission apparatus includes: an optical receiver configured to receive an optical signal; a variable optical attenuator configured to adjust a power of the optical signal to be input to the optical receiver according to a variable attenuation amount; and a controller configured to control the attenuation amount of the variable optical attenuator based on an electrical signal obtained by performing a coherent detection and a photoelectric conversion on the optical signal received by the optical receiver.
摘要翻译：光传输装置包括：光接收器，被配置为接收光信号; 可变光衰减器，被配置为根据可变衰减量调整要输入到光接收器的光信号的功率; 以及控制器，被配置为基于通过对由光接收器接收的光信号执行相干检测和光电转换而获得的电信号来控制可变光衰减器的衰减量。

10. 发明申请

US20160241341A1 OPTICAL TRANSMISSION APPARATUS, OPTICAL TRANSMISSION SYSTEM, AND POLARIZATION DEPENDENT LOSS MONITOR 有权
标题翻译：光传输装置，光传输系统和极化相关损失监测器
公开(公告)号：US20160241341A1
公开(公告)日：2016-08-18
申请号：US15013190
申请日：2016-02-02
申请人： FUJITSU LIMITED
发明人： Taketo Endo , Kosuke Komaki , Taku Saito , Hirofumi Araki , Makoto SHIMIZU , Hiroshi Nishida
IPC分类号： H04B10/50 , H04L25/03 , H04B10/079
CPC分类号： H04B10/50 , H04B10/0795 , H04B10/612 , H04B10/614 , H04B10/6162 , H04J14/02 , H04L25/03343
摘要： An optical transmission apparatus includes: a coherent detector configured to receive light including different polarization components from an optical transmission path, and perform coherent detection of received light including the different polarization components; an adaptive equalizer configured to adaptively equalize, by a digital filter, a complex electric signal for each of the polarization components obtained by the coherent detection, a gain value for controlling an amplitude of the complex electric signal being applied to the complex electric signal; and a polarization dependent loss monitor configured to determine a polarization dependent loss of the optical transmission path, based on a correction filter parameter obtained by correcting a filter parameter of the digital filter according to the gain value, the filter parameter being adaptively updated by an adaptive equalization of the adaptive equalizer.
摘要翻译：光传输装置包括：相干检测器，被配置为从光传输路径接收包括不同偏振分量的光，并对包括不同偏振分量的接收光进行相干检测; 自适应均衡器，被配置为通过数字滤波器自适应地均衡通过相干检测获得的每个偏振分量的复电信号，用于控制施加到复电信号的复信号的幅度的增益值; 以及偏振相关损耗监视器，其被配置为基于通过根据所述增益值校正所述数字滤波器的滤波器参数而获得的校正滤波器参数来确定所述光传输路径的偏振相关损耗，所述滤波器参数由适应性自适应地更新自适应均衡器的均衡。

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