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1. 发明授权

US10476632B2 Device and method for transmitting frame in optical transmission system 有权
公开(公告)号：US10476632B2
公开(公告)日：2019-11-12
申请号：US15640181
申请日：2017-06-30
申请人： FUJITSU LIMITED
发明人： Toshiki Tanaka , Tomoo Takahara
IPC分类号： H04L1/00 , H04B10/80 , H04B10/60 , H04B10/516 , H04B10/40
摘要： A transmission device is implemented in a first node in an optical transmission system in which a frame is transmitted from the first node to a second node via an optical interface. The transmission device includes a decision unit that decides whether a type of a first error correction code used in the first node is the same as a type of a second error correction code used in the second node. When a type of the first error correction code is the same as a type of the second error correction code, the transmission device transmits the frame to which an error correction code used in the first node is added to the second node without terminating the error correction code.

2. 发明申请

US20170272161A1 OPTICAL RECEIVING DEVICE AND METHOD FOR CONTROLLING DISPERSION COMPENSATION AMOUNT 有权
公开(公告)号：US20170272161A1
公开(公告)日：2017-09-21
申请号：US15413906
申请日：2017-01-24
申请人： FUJITSU LIMITED
发明人： Yutaka Kai , Tomoo Takahara , Toshiki Tanaka , Masato Nishihara , Ryou Okabe
IPC分类号： H04B10/2507 , H04L7/00 , H04B10/66 , H04B10/079 , H04B10/40
CPC分类号： H04B10/2507 , H04B10/079 , H04B10/25133 , H04B10/40 , H04B10/66 , H04B10/67 , H04J3/0644 , H04J3/0647 , H04L7/0075
摘要： An apparatus includes a receiver configured to receive a signal that has traveled an optical transmission line without returning output from an optical transmitting device and synchronize with the optical transmitting device in order to demodulate the signal; a dispersion compensator configured to compensate for wavelength dispersion caused by transmission of the signal; an acquisition circuit configured to acquire a transmitting timing at which the signal has been transmitted from the optical transmitting device; a calculation circuit configured to calculate a transmission time period from the optical transmitting device to the receiver from the transmitting timing and a receiving timing at which the signal has been received with the receiver; and an amount setting circuit configured to adjust a dispersion compensation amount of the dispersion compensator in accordance with the transmission time period.

3. 发明授权

US09749055B2 Optical transmitter and optical transmission method 有权
公开(公告)号：US09749055B2
公开(公告)日：2017-08-29
申请号：US14476307
申请日：2014-09-03
申请人： FUJITSU LIMITED
发明人： Toshiki Tanaka , Tomoo Takahara , Masato Nishihara
IPC分类号： H04B10/516 , H04B14/02 , H04L5/00 , H04B10/07 , H04B10/572 , H04B10/50 , H04J14/02
CPC分类号： H04B10/516 , H04B10/07 , H04B10/50 , H04B10/572 , H04J14/0298 , H04L5/0046 , H04L5/006 , H04L5/0064 , H04L5/0094
摘要： An optical transmitter converts a plurality of transmission signals transmitted via a plurality of lanes into a multi-carrier signal and transmits the multi-carrier signal. The optical transmitter includes: a controller configured to generate allocation information that indicates an allocation of sub-carriers to the plurality of lanes according to a bit rate of the transmission signal of each of the lanes and a possible transmission capacity of each of the sub-carriers; and a signal processor configured to convert the plurality of transmission signals into the multi-carrier signal in accordance with the allocation information generated by the controller.

4. 发明申请

US20170093515A1 OPTICAL TRANSMISSION SYSTEM, CONTROLLER FOR WAVELENGTH TUNABLE FILTER, AND CONTROL METHOD OF WAVELENGTH TUNABLE FILTER 有权
公开(公告)号：US20170093515A1
公开(公告)日：2017-03-30
申请号：US15264894
申请日：2016-09-14
申请人： FUJITSU LIMITED
发明人： Toshiki Tanaka , Ryou Okabe , Tomoo Takahara , MASATO NISHIHARA , YUTAKA KAI
IPC分类号： H04J14/02 , H04B10/564
CPC分类号： H04J14/0221 , H04B10/07957 , H04B10/564 , H04B10/572
摘要： There is proved an optical transmission system including: a transmitter configured to transmit an optical signal modulated with a discrete multi-tone (DMT) drive signal; a filter capable of changing a wavelength of the optical signal input from the transmitter; a monitor configured to monitor a power of the optical signal passed through the filter; and at least one processor configured to: set a center wavelength of the filter, shift the center wavelength, detect a change in the power monitored by the monitor, identify a carrier component of the optical signal based on the change in the power, and control a relative relationship between a transmission characteristic of the filter and a wavelength of the carrier component so that the carrier component is included in the optical signal and one of an upper sideband and a lower sideband of the optical signal is at least partially removed by the filter.

5. 发明申请

US20170078027A1 TRANSMISSION APPARATUS AND TRANSMISSION SYSTEM 有权
标题翻译：传输装置和传输系统
公开(公告)号：US20170078027A1
公开(公告)日：2017-03-16
申请号：US15244169
申请日：2016-08-23
申请人： FUJITSU LIMITED
发明人： Ryou Okabe , Tomoo Takahara , Toshiki Tanaka , MASATO NISHIHARA
IPC分类号： H04B10/58 , H04B10/079
CPC分类号： H04B10/58 , H04B10/07953 , H04B10/548 , H04B10/564 , H04J14/0298
摘要： A transmission apparatus including: a waveform shaper that performs spectrum correction on an optical signal converted from an electrical signal encoded by OFDM (Orthogonal Frequency Division Multiplexing); a converter that converts the optical signal on which the waveform shaper has performed the spectrum correction, into the electrical signal; and a nonlinear compensator that compensates for a nonlinear distortion with respect to the electrical signal converted by the converter.
摘要翻译：一种传输装置，包括：波形整形器，对由OFDM（正交频分复用）编码的电信号转换的光信号进行频谱校正; 将波形整形器进行了光谱校正的光信号转换为电信号的转换器; 以及非线性补偿器，其相对于由转换器转换的电信号补偿非线性失真。

6. 发明授权

US09185474B2 Wavelength path switching method, optical communication system, optical communication device, optical repeater, and network management device 有权
标题翻译：波长路径切换方法，光通信系统，光通信设备，光中继器，网管系统
公开(公告)号：US09185474B2
公开(公告)日：2015-11-10
申请号：US14261716
申请日：2014-04-25
申请人： FUJITSU LIMITED
发明人： Kyosuke Sone , Yasuhiko Aoki , Takeshi Hoshida , Toshiki Tanaka , Shoichiro Oda
IPC分类号： H04J14/02 , H04Q11/00 , H04B10/2513
CPC分类号： H04Q11/0005 , H04B10/25133 , H04B2210/256 , H04J14/0202 , H04J14/0204 , H04J14/0212 , H04J14/0271 , H04J14/0275 , H04J14/0287 , H04Q2011/0037
摘要： At least one of a first device, a second device, and a relay device compensates for wavelength dispersion in a first optical wavelength path. The first or second device changes a wavelength dispersion compensation amount at the first or second device so that wavelength dispersion in a second optical wavelength path is compensated. The relay device changes a wavelength dispersion compensation amount at the relay device so that a total amount of wavelength dispersion of the signal light compensated in the first optical wavelength path does not change substantially with the change in the wavelength dispersion compensation amount at the first or second device. The first optical wavelength path is switched to the second optical wavelength path after the wavelength dispersion compensation amount at the first or second device is changed to a value that can compensate for the wavelength dispersion in the second optical wavelength path.
摘要翻译：第一装置，第二装置和中继装置中的至少一个补偿第一光波长路径中的波长色散。第一或第二装置改变第一或第二装置处的波长色散补偿量，使得补偿第二光波长路径中的波长色散。中继装置改变中继装置处的波长色散补偿量，使得在第一光波长路径中补偿的信号光的波长色散的总量基本上随第一或第二波长色散补偿量的变化而变化设备。在将第一或第二装置的波长色散补偿量改变为可以补偿第二光波长路径中的波长色散的值之后，将第一光波长路径切换到第二光波长路径。

7. 发明授权

US09088383B2 Transmitting apparatus, receiving apparatus, optical frequency division multiplex transmission system, and optical signal communication method 有权
标题翻译：发射装置，接收装置，光分频复用传输系统和光信号通信方法
公开(公告)号：US09088383B2
公开(公告)日：2015-07-21
申请号：US14017607
申请日：2013-09-04
申请人： FUJITSU LIMITED
发明人： Toshiki Tanaka , Masato Nishihara , Tomoo Takahara , Tomoyuki Kato , Yutaka Kai , Shigeki Watanabe
IPC分类号： H04J14/00 , H04J14/02 , H04L27/26
CPC分类号： H04J14/0298 , H04J14/028 , H04L27/2697
摘要： A transmitting apparatus is used in an electrical frequency division multiplex transmission system including nodes that are on an optical transmission path and that respectively frequency-multiplex a sub-carrier of a unique frequency and a carrier wave to transmit information to a receiving apparatus on the optical transmission path. The transmitting apparatus is disposed in each node and includes a determining unit that receives an input of information concerning unused sub-carriers of a transmission signal in the optical transmission path and determines transmission of the information to the receiving apparatus using an unused sub-carrier; an electrical frequency division multiplex transmission unit that using a frequency of the unused sub-carrier determined by the determining unit, modulates the input information to be transmitted to the receiving apparatus; and a coupling unit that adds to the transmission signal in the optical transmission path, a modulated modulation signal.
摘要翻译：发送装置用于包括在光传输路径上的节点并且分别对唯一频率和载波的子载波进行频率复用以在光学上向接收装置发送信息的电频分复用传输系统传输路径。所述发送装置设置在各节点中，并且包括确定单元，其接收与所述光传输路径中的发送信号的未使用的子载波的信息的输入，并且使用未使用的子载波来确定所述信息向所述接收装置的发送; 使用由所述确定单元确定的未使用子载波的频率的电频分复用发送单元，对要发送到所述接收装置的输入信息进行调制; 以及耦合单元，其对光传输路径中的传输信号进行调制调制信号。

8. 发明申请

US20150071642A1 OPTICAL TRANSMITTER, OPTICAL RECEIVER, OPTICAL TRANSMISSION SYSTEM, OPTICAL TRANSMITTING METHOD, OPTICAL RECEIVING METHOD AND OPTICAL TRANSMISSION METHOD 有权
标题翻译：光学发射器，光接收器，光传输系统，光传输方法，光接收方法和光传输方法
公开(公告)号：US20150071642A1
公开(公告)日：2015-03-12
申请号：US14333095
申请日：2014-07-16
申请人： FUJITSU LIMITED
发明人： Toshiki Tanaka , Tomoo Takahara , Masato Nishihara
IPC分类号： H04L7/00 , H04B10/27 , H04B10/60 , H04B10/2575 , H04B10/50
CPC分类号： H04B10/27 , H04B10/2575 , H04B10/50 , H04B10/548 , H04B10/60 , H04L5/001 , H04L27/26 , H04L27/2633 , H04L27/2655 , H04L27/2697
摘要： An optical transmitter includes: a digital signal process unit that generates a drive signal for generating multi-carrier signals through a plurality of independent digital signal processes, the multi-carrier signals having a cyclic prefix and to be transmitted by a parallel transmission; a synchronization unit that synchronizes clocks of the plurality of digital signal processes; and an adjust unit that reduces a delay difference of the cyclic prefix between the multi-carrier signals after the parallel transmission.
摘要翻译：光发射机包括：数字信号处理单元，通过多个独立的数字信号处理产生用于生成多载波信号的驱动信号，多载波信号具有循环前缀并通过并行传输进行传输; 同步单元，其同步所述多个数字信号处理的时钟; 以及调整单元，其减少并行传输之后的多载波信号之间的循环前缀的延迟差。

9. 发明授权

US08965202B2 Optical power monitor, optical power control system and optical power monitor method 有权
标题翻译：光功率监视器，光功率控制系统及光功率监控方式
公开(公告)号：US08965202B2
公开(公告)日：2015-02-24
申请号：US13693237
申请日：2012-12-04
申请人： Fujitsu Limited
发明人： Kyosuke Sone , Yasuhiko Aoki , Takahito Tanimura , Toshiki Tanaka , Shoichiro Oda
IPC分类号： H04B10/08 , H04B17/00
CPC分类号： H04B10/07955 , H04J14/0201 , H04J14/0221
摘要： An optical power monitor that detects optical power of respective wavelengths of a signal light in a wavelength multiplexing system, includes: a light emitter configured to superimpose a frequency modulation component on a signal light; a wavelength tunable filter configured to sweep a pass band of the signal light across a wavelength band for a signal light; and a detector configured to detect intensity changes in optical power passing through the wavelength tunable filter with a frequency modulation of the optical power, and to detect an optical power measurement value at a middle point of two points of the intensity changes of the optical power as the optical power of a wavelength to be measured.
摘要翻译：一种检测波长多路复用系统中的信号光的波长的光功率的光功率监视器，包括：发射器，被配置为在信号光上叠加调频分量; 波长可调滤波器，其被配置为扫描信号光的通带，用于信号光的波长带; 以及检测器，被配置为通过光功率的频率调制来检测通过波长可调滤波器的光功率的强度变化，并且检测光功率强度变化的两点的中点处的光功率测量值，要测量的波长的光功率。

10. 发明申请

US20130272719A1 Method and Apparatus for Compensating Nonlinear Distortions in Intensity Modulation-Direct Detection System 有权
标题翻译：用于补偿强度调制直接检测系统中的非线性失真的方法和装置
公开(公告)号：US20130272719A1
公开(公告)日：2013-10-17
申请号：US13860616
申请日：2013-04-11
申请人： FUJITSU LIMITED
发明人： Weizhen YAN , Bo Liu , Lei Li , Zhenning Tao , Toshiki Tanaka
IPC分类号： H04B10/2507
CPC分类号： H04B10/2507 , H04L25/0202 , H04L25/03019 , H04L2025/03375 , H04L2025/03592
摘要： The embodiments of the present invention provide a method and an apparatus for compensating nonlinear distortions in an intensity modulation-direct detection (IM-DD) system; wherein the method comprises: calculating, according to nonlinear coefficients and differences between values of an input signal at different time, nonlinear distortions of the input signal, so as to eliminate the nonlinearity distortions. By applying the method and the apparatus provided by the embodiments of the present invention, nonlinear cost of the IM-DD system can be effectively reduced, thereby improving the system capacity.
摘要翻译：本发明的实施例提供了一种用于补偿强度调制直接检测（IM-DD）系统中的非线性失真的方法和装置; 其特征在于，所述方法包括：根据非线性系数和不同时间的输入信号的值之差计算输入信号的非线性失真，从而消除非线性失真。通过应用本发明实施例提供的方法和装置，可以有效地降低IM-DD系统的非线性成本，从而提高系统容量。

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