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公开(公告)号：US11880068B2
公开(公告)日：2024-01-23
申请号：US17527757
申请日：2021-11-16
发明人： Yuping Wu , Chunhui Zhang , Changzheng Su
IPC分类号： H04B10/60 , G02B6/26 , H04B10/61 , H04B10/80 , H04J14/02 , H04B10/11 , H04B10/67 , H04B10/112
CPC分类号： G02B6/26 , H04B10/61 , H04B10/801 , H04J14/02 , H04B10/11 , H04B10/1121 , H04B10/60 , H04B10/615 , H04B10/67
摘要： A space optical coupling apparatus, including M first couplers, a phase adjustment apparatus, N beam splitters, M second couplers, a coupling apparatus, and a controller. The first coupler receives a beam, and couples the beam to the phase adjustment apparatus. The phase adjustment apparatus includes M phase adjusters, N beam splitters, and N detectors. Each beam splitter is configured to split a received beam into two beams, one sent to a corresponding detector and the other sent to a corresponding phase adjuster. The second coupler receives output light from the coupling apparatus, and transmits the output light into the space. The coupling apparatus is configured to couple a beam onto a single-mode fiber. The controller is configured to control, based on the beam intensity detected by the detector and the beam intensity on the single-mode fiber, the M phase adjusters to adjust the phases of the received beams.
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公开(公告)号：US20200266978A1
公开(公告)日：2020-08-20
申请号：US16868789
申请日：2020-05-07
发明人： Zhengyu Li , Changzheng Su , Yang Zou , Yongjing Cai
IPC分类号： H04L9/08 , H04B10/64 , H04B10/556 , H03M1/12 , G02B27/28
摘要： A key generation method includes modulating a first key to a first light source signal, to obtain a modulated optical signal, splitting the modulated optical signal, to obtain a first sub modulated optical signal and a second sub modulated optical signal, attenuating the first sub modulated optical signal such that a quantity of photons included in each period of the first sub modulated optical signal is less than a preset value, and sending an attenuated first sub modulated optical signal to a receive-end device, and obtaining a second key carried in the second sub modulated optical signal, and storing the second key.
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公开(公告)号：US20240154699A1
公开(公告)日：2024-05-09
申请号：US18416436
申请日：2024-01-18
发明人： Changzheng Su , Lei Zhao , Yigang Zhou
IPC分类号： H04B10/2507 , H04B10/40
CPC分类号： H04B10/2507 , H04B10/40 , H04B2210/006
摘要： An optical/electrical module includes an analog equalizer and an optical/electrical conversion unit. The analog equalizer is connected to the optical/electrical conversion unit. The analog equalizer is configured to: perform first analog signal equalization processing on a first electrical signal to obtain a second electrical signal, and send the second electrical signal to the optical/electrical conversion unit, or is configured to: receive a third electrical signal from the optical/electrical conversion unit, and perform second analog signal equalization processing on the third electrical signal to obtain a fourth electrical signal. The optical/electrical conversion unit is configured to: receive the second electrical signal from the analog equalizer and convert the second electrical signal into a first optical signal. According to embodiments of this application, equalization processing may be performed on an electrical signal in an analog domain.
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公开(公告)号：US20210279630A1
公开(公告)日：2021-09-09
申请号：US17243072
申请日：2021-04-28
发明人： Zhengyu Li , Changzheng Su , Yang Zou , Yongjing Cai
摘要： A quantum bit control apparatus, including a control signal generator, optoelectronic detectors, a quantum chip, and a shielding apparatus, the optoelectronic detectors are disposed in the shielding apparatus, and an inner part of the shielding apparatus is in a vacuum state. The control signal generator is disposed in a first temperature area, and is configured to generate optical control signals and send the N optical control signals to the optoelectronic detectors. The optoelectronic detectors are disposed in a second temperature area having a temperature lower than of the first temperature area. The N optoelectronic detectors are configured to convert the received optical control signals into electronically controlled signals and send the electronically controlled signals to the quantum chip. The quantum chip is disposed in the second temperature area, and controls a quantum bit in the quantum chip based on the electronically controlled signals.
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公开(公告)号：US10958427B2
公开(公告)日：2021-03-23
申请号：US16116171
申请日：2018-08-29
发明人： Changzheng Su
IPC分类号： H04L9/08 , H04B10/532 , H04B10/61 , H04B10/80 , H04J14/06
摘要： In the embodiments of the present invention, a transmit optical signal includes a reference optical signal and a quantum optical signal, optical splitting processing and coherent coupling are performed on the transmit optical signal by using a local oscillator optical signal to obtain at least two coherently coupled optical signals, and then optical-to-electrical conversion and amplification are separately performed on a first coherently coupled optical signal that includes the reference optical signal and a second coherently coupled optical signal that includes the quantum optical signal, to obtain a first electrical signal and a second electrical signal. Then, phase frequency information between the local oscillator optical signal and the reference optical signal is obtained from the first electrical signal, and an original key is recovered from the second electrical signal based on the phase frequency information.
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公开(公告)号：US11044016B2
公开(公告)日：2021-06-22
申请号：US16717427
申请日：2019-12-17
发明人： Zhengyu Li , Changzheng Su , Liangliang Lu
摘要： A data transmission method to avoid a channel resource waste where first random data and second random data are generated by a sending device; at least two pieces of reference data are determined; a modulation signal based on the first random data, the second random data, and the at least two pieces of reference data are generated; a component in a first polarization direction and a component in a second polarization direction of a first laser signal by using the modulation signal are modulated by the sending device, to obtain a second laser signal, where the first polarization direction and the second polarization direction are perpendicular to each other, and the second laser signal includes a quantum light and a reference light; and the second laser signal is sent by the sending device.
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公开(公告)号：US20190028206A1
公开(公告)日：2019-01-24
申请号：US16139307
申请日：2018-09-24
发明人： Changzheng Su , Yang Zou
摘要： Embodiments of this application disclose a quantum signal detection method and a quantum signal detection apparatus. The method includes: splitting a received optical pulse sequence into a first pulse sequence and a second pulse sequence that are in orthogonal polarization, where the signal pulses are quantum signal pulses; obtaining information about the reference pulses; generating local oscillator light; splitting the local oscillator light into first local oscillator light and second local oscillator light whose intensities are the same and that are in orthogonal polarization; performing homodyne detection on the first pulse sequence and the first local oscillator light, and performing homodyne detection on the second pulse sequence and the second local oscillator light, to obtain homodyne detection results; and obtaining regular components of the signal pulses in the optical pulse sequence according to the homodyne detection results and the information about the reference pulses.
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8.发明授权公开(公告)号：US12028450B2
公开(公告)日：2024-07-02
申请号：US16402525
申请日：2019-05-03
发明人： Changzheng Su , Liangliang Lu , Su Hu , Xianlong Luo
IPC分类号： H04L9/08
CPC分类号： H04L9/0855 , H04L9/08 , H04L9/0838
摘要： Embodiments of this application relate to the field of communications technologies. The embodiments of this application are applicable to a centralized management and control network. A centralized controller obtains Z service requests, globally determines, based on an identifier of a source service node and an identifier of a destination service node that are corresponding to each of the Z service requests, a quantum key consumption parameter, and topology information of key nodes in the centralized management and control network, globally optimal key relay instructions corresponding to G service requests, and further delivers the key relay instructions corresponding to the G service requests to key nodes corresponding to the key relay instructions, so that the key nodes perform quantum key relay based on the key relay instructions, to generate a shared quantum key between the source key node and the destination key node.
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公开(公告)号：US11875223B2
公开(公告)日：2024-01-16
申请号：US17243072
申请日：2021-04-28
发明人： Zhengyu Li , Changzheng Su , Yang Zou , Yongjing Cai
摘要： A quantum bit control apparatus, including a control signal generator, optoelectronic detectors, a quantum chip, and a shielding apparatus, the optoelectronic detectors are disposed in the shielding apparatus, and an inner part of the shielding apparatus is in a vacuum state. The control signal generator is disposed in a first temperature area, and is configured to generate optical control signals and send the N optical control signals to the optoelectronic detectors. The optoelectronic detectors are disposed in a second temperature area having a temperature lower than of the first temperature area. The N optoelectronic detectors are configured to convert the received optical control signals into electronically controlled signals and send the electronically controlled signals to the quantum chip. The quantum chip is disposed in the second temperature area, and controls a quantum bit in the quantum chip based on the electronically controlled signals.
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公开(公告)号：US10778341B2
公开(公告)日：2020-09-15
申请号：US16206452
申请日：2018-11-30
发明人： Changzheng Su , Liangliang Lu
IPC分类号： H04B10/70 , H04B10/2537 , H04J14/02 , H04B10/50
摘要： In the embodiments of the present disclosure, a transmit apparatus generates a to-be-processed optical signal and a quantum optical signal, where the to-be-processed optical signal includes at least a classical optical signal; and the transmit apparatus couples the to-be-processed optical signal and the quantum optical signal, to obtain a coupled optical signal, and sends the coupled optical signal. Because a wavelength of the classical optical signal is in an L band and/or a C band and a wavelength of the quantum optical signal is in an S band, a wavelength in the band of the classical optical signal is greater than a wavelength in the band of the quantum optical signal.
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