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公开(公告)号：US10756819B2
公开(公告)日：2020-08-25
申请号：US16842117
申请日：2020-04-07
IPC分类号： H04B10/54 , H04J14/02 , H04B10/548 , H04B10/516 , H04B10/50 , H04L1/00
摘要： An encoding device includes an encoding unit, DA converters, light sources, intensity modulators, and wavelength multiplexers. The encoding unit adds (NM/2) to an encoded signal having a negative minimum value in a range of the encoded signal among encoded signals of N channels of (NM+1) values obtained by calculating an inner product of a Hadamard matrix of N rows and N columns and a matrix having elements of N intensity signals of (M+1) values. The DA converters of the channels convert the encoded signals of the channels from digital signals into electrical analog signals. The light sources output light of wavelengths for use in the channels. The light intensity modulators of the channels intensity-modulate the light output from the light sources with the encoded signals converted into the electrical analog signals by the DA converters. The wavelength multiplexer outputs a wavelength-multiplexed signal obtained by wavelength-multiplexing the light intensity-modulated by the light intensity modulators.
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公开(公告)号：US10651945B2
公开(公告)日：2020-05-12
申请号：US16340658
申请日：2017-10-16
IPC分类号： H04B10/54 , H04J14/02 , H04B10/548 , H04B10/516 , H04B10/50
摘要： An encoding device includes an encoding unit, DA converters, light sources, intensity modulators, and wavelength multiplexers. The encoding unit adds (NM/2) to an encoded signal having a negative minimum value in a range of the encoded signal among encoded signals of N channels of (NM+1) values obtained by calculating an inner product of a Hadamard matrix of N rows and N columns and a matrix having elements of N intensity signals of (M+1) values. The DA converters of the channels convert the encoded signals of the channels from digital signals into electrical analog signals. The light sources output light of wavelengths for use in the channels. The light intensity modulators of the channels intensity-modulate the light output from the light sources with the encoded signals converted into the electrical analog signals by the DA converters. The wavelength multiplexer outputs a wavelength-multiplexed signal obtained by wavelength-multiplexing the light intensity-modulated by the light intensity modulators.
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公开(公告)号：US20230082854A1
公开(公告)日：2023-03-16
申请号：US17801130
申请日：2020-02-26
发明人： Hideki Nishizawa , Seiki Kuwabara , Seiji Okamoto , Shuto Yamamoto , Tetsuro Inui , Shunichi Soma , Kenya Suzuki , Osamu Moriwaki , Keita Yamaguchi
IPC分类号： H04B10/61 , H04L45/00 , H04B10/2575
摘要： A photo-electron fusion switch that can perform optical communications without any trouble, even when nodes of a communication source and a communication partner that are large in transmission capacity are connected, and makes it possible to realize a concentrated arrangement of devices having similar functions and reduce the communication processing time is connected to communication source's information processing devices and communication partner's information processing devices and information processing devices that are each different in transmission speed so as to configure an optical network system. The photo-electron fusion switch includes a network processor of an electronic circuit for controlling packet switch functions, a plurality of optical transmitter/receivers that can support coherent communications and has a photoelectric conversion function capable of transmitting and receiving optical signals different in transmission speed, an optical line switching device, and a plurality of multiplexing/separators. Each multiplexing/separator simultaneously transmits and receives respective optical signals different in transmission speed to and from the nodes via optical waveguides.
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公开(公告)号：US20230073384A1
公开(公告)日：2023-03-09
申请号：US17795603
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
IPC分类号： H04Q11/00
摘要： An optical and electronic integrated switch includes a network processor that controls the functions of the packet switch, a plurality of optical transceivers having photoelectric conversion functions, and a plurality of optical switches. The optical switches include different types of optical core switch and a plurality of optical-path selection switches. The optical transceivers provided near the processor have a regenerative relay function that regenerates optical signals and turns back the optical signals, and perform optical communication with a communication counterpart via the optical switches. In the optical communication, optical switches of the different types can cooperate to set paths for optical cut-through in which path selection is performed such that inputted optical signals are outputted without the intervention of the processor. This optical cut-through can be effectively performed without imposing a signal processing burden that consumes electric power on the processor.
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公开(公告)号：US10693562B2
公开(公告)日：2020-06-23
申请号：US16340658
申请日：2017-10-16
IPC分类号： H04B10/54 , H04J14/02 , H04B10/548 , H04B10/516 , H04B10/50
摘要： An encoding device includes an encoding unit, DA converters, light sources, intensity modulators, and wavelength multiplexers. The encoding unit adds (NM/2) to an encoded signal having a negative minimum value in a range of the encoded signal among encoded signals of N channels of (NM+1) values obtained by calculating an inner product of a Hadamard matrix of N rows and N columns and a matrix having elements of N intensity signals of (M+1) values. The DA converters of the channels convert the encoded signals of the channels from digital signals into electrical analog signals. The light sources output light of wavelengths for use in the channels. The light intensity modulators of the channels intensity-modulate the light output from the light sources with the encoded signals converted into the electrical analog signals by the DA converters. The wavelength multiplexer outputs a wavelength-multiplexed signal obtained by wavelength-multiplexing the light intensity-modulated by the light intensity modulators.
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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：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：US11581944B2
公开(公告)日：2023-02-14
申请号：US17291170
申请日：2019-11-07
IPC分类号： H04B10/2507 , H03M13/41 , H04B10/516 , H04B10/61 , H04L25/49
摘要： An optical transmission system including an optical transmitter and an optical receiver, wherein the optical transmitter includes a signal coding unit that performs non-linear block coding on an M (M is an integer greater than or equal to 1)-value symbol sequence or a bit sequence input as data information to generate an L (L is an integer greater than or equal to 2, L>M)-value symbol sequence that corresponds to the M-value symbol sequence or the bit sequence in one-to-one correspondence, a digital-to-analog conversion unit that converts the generated L-value symbol sequence to an analog signal, and a modulator that generates an optical modulation signal by performing modulation based on the analog signal, and the optical receiver includes a light receiving unit that receives the optical modulation signal transmitted from the optical transmitter and converts the optical modulation signal to an electrical signal, and a signal decoding unit that restores the M-value symbol sequence or the bit sequence by performing processing that is the reverse of processing performed by the signal coding unit, on the electrical signal.
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公开(公告)号：US11444694B2
公开(公告)日：2022-09-13
申请号：US17291228
申请日：2019-11-06
IPC分类号： H04J14/02 , H04B10/2507 , H03M13/41 , H04B10/516 , H04B10/61 , H04L25/49
摘要： Provided is an optical transmission system that includes an optical transmitter, and an optical receiver. The optical transmitter includes: a signal coding unit configured to perform nonlinear trellis coding, which corresponds to nonlinear calculation, on a symbol sequence; and a modulator configured to modulate the symbol sequence subjected to the nonlinear trellis coding by the signal coding unit, and transmit the modulated symbol sequence to the optical receiver. The optical receiver includes: a light receiving unit configured to receive an optical signal transmitted from the optical transmitter, and convert the received optical signal into an electrical signal; and a digital signal processing unit configured to perform digital signal processing on the electrical signal to reconstruct the symbol sequence.
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