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公开(公告)号：US11381317B2
公开(公告)日：2022-07-05
申请号：US17420845
申请日：2020-01-06
IPC分类号： H04B10/2513 , H04B10/61
摘要： An optical receiving device that divides receive signals obtained by receiving an optical signal using a coherent detection scheme into a plurality of frequency bands, matches timing of the receive signals along a time axis between the frequency bands resulting from the division, performs a combining process of combining the receive signals contained in the plurality of frequency bands, and compensates the receive signals for waveform distortion either before or after the combining process, includes: a first wavelength dispersion compensation unit adapted to compensate the receive signals for waveform distortion in each of the frequency bands resulting from the division; a first nonlinear compensation unit adapted to compensate the receive signals belonging to each of the frequency bands and timed with each other in a time domain for a nonlinear optical effect; and a second wavelength dispersion compensation unit adapted to compensate the receive signals belonging to each of the frequency bands and compensated for the nonlinear optical effect for wavelength dispersion in each of the frequency bands.
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公开(公告)号：US10171173B2
公开(公告)日：2019-01-01
申请号：US15122582
申请日：2015-03-17
发明人： Seiji Okamoto , Koichi Ishihara , Etsushi Yamazaki , Mitsuteru Yoshida , Tomoyoshi Kataoka , Kazushige Yonenaga , Yoshiaki Kisaka , Masanori Nakamura , Masahito Tomizawa
IPC分类号： H04B10/50 , H04B10/516 , H04B10/2513 , H04L27/34 , H04B10/508 , H04B10/077 , H04B10/2557 , H04L27/36
摘要： An optical signal transmission apparatus includes a modulation unit which modulates a transmission signal, a training signal sequence generation unit which generates a plurality of signal sequences having power concentrated in a plurality of different frequency bands, at least one of an amplitude and a phase of the plurality of signal sequences being modulated, as a training signal sequence, a signal multiplexing unit which appends the training signal sequence to the transmission signal, and an electro-optical conversion unit which converts a signal sequence obtained by appending the training signal sequence to the transmission signal into an optical signal and transmits the optical signal.
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公开(公告)号：US11930309B2
公开(公告)日：2024-03-12
申请号：US17801446
申请日：2020-02-26
发明人： Keita Yamaguchi , Osamu Moriwaki , Shunichi Soma , Kenya Suzuki , Seiki Kuwabara , Tetsuro Inui , Shuto Yamamoto , Seiji Okamoto , Hideki Nishizawa
IPC分类号： H04Q11/00
CPC分类号： H04Q11/0005 , H04Q2011/0052
摘要： A photonics-electronics convergence switch with which, even if an optical network system is built by combining a plurality of packet switches, the amount of processing in the packet switches does not increase, the optical network system operates with low electric power consumption, and this enables wide-range optical communication between the nodes of a communication origin and of a communication partner, includes a network processor that is an electronic circuit configured to control the functions of the packet switch, a plurality of optical transmitter-receivers having photoelectric conversion functions, and a plurality of optical switches. Different types of optical switches cooperate to select a path through which inputted optical signals or optical signals inputted from a different packet switch connected to the packet switch are outputted to a different packet switch without passing through the processor and a path through which inputted optical signals or optical signals inputted from a different packet switch pass through the processor and are subjected to photoelectric conversion.
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公开(公告)号：US11683093B2
公开(公告)日：2023-06-20
申请号：US17614686
申请日：2019-06-06
发明人： Masanori Nakamura , Seiji Okamoto , Kengo Horikoshi , Shuto Yamamoto , Takayuki Kobayashi , Yoshiaki Kisaka , Masahito Tomizawa
IPC分类号： H04B10/06 , H04B10/2513 , H03H17/02 , H04B10/61
CPC分类号： H04B10/2513 , H03H17/0213 , H04B10/61 , H04B10/616
摘要： An electric digital received signal obtained from a received optical signal is segmented into blocks of a certain length with an overlap of a length determined in advance with an adjacent block. Fourier transformation is performed for each of the blocks. The blocks subjected to the Fourier transformation are stored consecutively in time series, a coefficient determined based on a wavelength dispersion compensation amount according to one of frequency positions and a delay amount according to one of the frequency positions and one of time positions is applied to each of frequency component values included in a plurality of the stored blocks, and the blocks to which the coefficient has been applied and which are obtained by adding up the frequency component values to which the coefficient has been applied for each of the frequency positions are generated. Inverse Fourier transformation is performed on the generated blocks to which the coefficient has been applied. A part of the overlap subjected to the inverse Fourier transformation is removed.
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公开(公告)号：US20230136142A1
公开(公告)日：2023-05-04
申请号：US17794526
申请日：2020-01-30
发明人： Osamu Moriwaki , Shunichi Soma , Keita Yamaguchi , Kenya Suzuki , Seiki Kuwabara , Tetsuro Inui , Shuto Yamamoto , Seiji Okamoto , Hideki Nishizawa
摘要： A high-performance optical and electronic integrated switch capable of effectively extending the transmission distance includes a network processor that controls the functions of the packet switch, a plurality of optical transceivers provided near the processor and having a photoelectric conversion function, and an optical relay switch. A plurality of optical waveguides are connected to the input and output sides of the optical relay switch. Each optical transceiver has a regeneration function that performs optical-electrical conversion on inputted optical signals, then turns back the converted signals, and performs signal conversion on them, and its input side is connected with a routing optical waveguide included in the optical waveguides on the output side of the switch and its output side is connected with a routing optical waveguide included in the optical waveguides on the input side of the switch. The optical waveguides include ones for connecting to an external communication counterpart.
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公开(公告)号：US20230060777A1
公开(公告)日：2023-03-02
申请号：US17801446
申请日：2020-02-26
发明人： Keita Yamaguchi , Osamu Moriwaki , Shunichi Soma , Kenya Suzuki , Seiki Kuwabara , Tetsuro Inui , Shuto Yamamoto , Seiji Okamoto , Hideki Nishizawa
IPC分类号： H04Q11/00
摘要： A photonics-electronics convergence switch with which, even if an optical network system is built by combining a plurality of packet switches, the amount of processing in the packet switches does not increase, the optical network system operates with low electric power consumption, and this enables wide-range optical communication between the nodes of a communication origin and of a communication partner, includes a network processor that is an electronic circuit configured to control the functions of the packet switch, a plurality of optical transmitter-receivers having photoelectric conversion functions, and a plurality of optical switches. Different types of optical switches cooperate to select a path through which inputted optical signals or optical signals inputted from a different packet switch connected to the packet switch are outputted to a different packet switch without passing through the processor and a path through which inputted optical signals or optical signals inputted from a different packet switch pass through the processor and are subjected to photoelectric conversion.
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公开(公告)号：US11463169B2
公开(公告)日：2022-10-04
申请号：US17425994
申请日：2020-01-15
IPC分类号： H04B10/2507
摘要： A wavelength dispersion amount estimation apparatus includes a correlation signal generation unit configured to generate, from a receive signal, a first signal including a main signal of the receive signal and a second signal, which includes an image signal corresponding to the main signal, with a shift by a baud rate of the receive signal relative to the first signal in a frequency domain, a correlation calculation unit configured to calculate a cross correlation of the first signal and the second signal, and a dispersion amount calculation unit configured to calculate a wavelength dispersion amount, based on a position of a peak of the cross correlation.
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18.发明授权公开(公告)号：US11444699B2
公开(公告)日：2022-09-13
申请号：US17424766
申请日：2020-01-15
发明人： Akira Masuda , Fukutaro Hamaoka , Shuto Yamamoto , Seiji Okamoto , Kengo Horikoshi , Masanori Nakamura , Asuka Matsushita , Yoshiaki Kisaka
IPC分类号： H04B10/69 , H04B10/548 , H04B10/67
摘要： There are provided an optical transmission apparatus that subjects a transmission signal including a plurality of sequences to Hadamard transform to obtain a signal in which a predetermined delay is added to one of the sequences, optically modulates the obtained signal, and transmits the modulated signal, and an optical reception apparatus that demodulates a reception signal received from the optical transmission apparatus by subjecting the reception signal to adaptive equalization processing with a predetermined number of taps. The optical reception apparatus includes: an adaptive equalization processing unit that subjects the reception signal to adaptive equalization processing of wavelength distortion compensation with a number of taps obtained by subtracting a number in accordance with the delay from the predetermined number of taps; a delay compensation unit that subjects the reception signal subjected to the wavelength distortion compensation to delay compensation in accordance with the delay; and an inverse Hadamard transform unit that subjects the reception signal subjected to the delay compensation to inverse Hadamard transform.
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公开(公告)号：US11258512B2
公开(公告)日：2022-02-22
申请号：US17055045
申请日：2019-05-08
IPC分类号： H04B10/2513 , H04B10/079 , H04B10/61
摘要： A reception apparatus includes a dispersion compensation unit configured to acquire an electrical signal resulting from conversion of an optical signal and perform, on the electrical signal, dispersion compensation with a predetermined compensation amount, a clip rate measurement unit configured to measure a clip rate for the electrical signal subjected to the dispersion compensation, and a control unit configured to detect the compensation amount that minimizes the clip rate.
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公开(公告)号：US12034484B2
公开(公告)日：2024-07-09
申请号：US17797743
申请日：2020-02-17
发明人： Takafumi Tanaka , Hideki Nishizawa , Tetsuro Inui , Seiki Kuwabara , Shuto Yamamoto , Seiji Okamoto
摘要： A virtual environment optical communication network is generated by setting configuration parameters of physical packages of a real environment optical communication network in package emulators that a computer program has virtually constructed to implement the physical packages, the real environment optical communication network being constructed by a plurality of node devices in which the physical packages are mounted, pieces of configuration data are generated based on pieces of resource data indicating resources required for optical paths detected based on acquired configuration parameters and a requested transmission mode, optical paths are set in the virtual environment optical communication network based on the generated pieces of configuration data, and optical paths are set in the real environment optical communication network based on the pieces of configuration data that have been used to set the optical paths.
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