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1. 发明公开

EP3952143A1 SPACE OPTICAL COUPLING APPARATUS 审中-实审
公开(公告)号：EP3952143A1
公开(公告)日：2022-02-09
申请号：EP20813894.1
申请日：2020-02-03
申请人： Huawei Technologies Co., Ltd.
发明人： WU, Yuping , ZHANG, Chunhui , SU, Changzheng
IPC分类号： H04B10/60
摘要： This application provides 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 beam is sent to a corresponding detector, and the other beam is sent to a corresponding phase adjuster. The second coupler receives output light from the coupling apparatus, and couples the output light to space. The coupling apparatus is configured to couple a beam coupled to space to a single-mode fiber. The controller is configured to control, based on beam intensity detected by the detector and beam intensity on the single-mode fiber, the M phase adjusters to adjust phases of received beams. Impact of beam wander, an angle of arrival fluctuation, a laser intensity fluctuation, a phase fluctuation, beam expansion, and the like on optical fiber coupling can be counteracted.

2. 发明公开

EP4358438A1 PHOTOELECTRIC MODULE, COMMUNICATION METHOD, AND RELATED DEVICE 审中-实审
公开(公告)号：EP4358438A1
公开(公告)日：2024-04-24
申请号：EP21950395.0
申请日：2021-07-19
申请人： Huawei Technologies Co., Ltd.
发明人： SU, Changzheng , ZHAO, Lei , ZHOU, Yigang
IPC分类号： H04B10/556
CPC分类号： H04B10/556
摘要： Embodiments of this application disclose an optical/electrical module, a communication method, and a related device. The 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, or is configured to: convert a second optical signal into the third electrical signal and send the third electrical signal to the analog equalizer. According to embodiments of this application, equalization processing may be performed on an electrical signal in an analog domain, to reduce a signal transmission latency while ensuring signal transmission quality.

3. 发明公开

EP3893262A1 ION TRAP SYSTEM 审中-实审
公开(公告)号：EP3893262A1
公开(公告)日：2021-10-13
申请号：EP19906428.8
申请日：2019-12-12
申请人： Huawei Technologies Co., Ltd.
发明人： SHEN, Yangchao , LI, Zhengyu , SU, Changzheng
IPC分类号： H01J3/00
摘要： An ion trap system includes the following. A laser adjustment and control module (11) is configured to: split a light beam into P first light beams and Q second light beams, transmit N first light beams in the P first light beams to N ions (121), respectively, and transmit M second light beams in the Q second light beams to M monitoring units (122), respectively. The M monitoring units (122) are configured to monitor the M second light beams, respectively, and obtain spatial intensity distribution information of the M second light beams, respectively. A feedback control module (13) is configured to: receive the spatial intensity distribution information of the M second light beams, determine N first control signals based on the spatial intensity distribution information of the M second light beams, and transmit the N first control signals to the laser adjustment and control module (11), where the N first control signals are in a one-to-one correspondence with the N first light beams, and the first control signal is used to control the laser adjustment and control module (11) to align the corresponding first light beam with the ion (121). In this way, alignment between the first light beam and the corresponding ion (121) is improved, so that fidelity of quantum state manipulation performed on the ion (121) is improved.

4. 发明公开

EP3425844A1 QUANTUM SIGNAL DETECTION METHOD AND QUANTUM SIGNAL DETECTION APPARATUS 有权
公开(公告)号：EP3425844A1
公开(公告)日：2019-01-09
申请号：EP17769238.1
申请日：2017-01-25
申请人： Huawei Technologies Co., Ltd.
发明人： SU, Changzheng , ZOU, Yang
IPC分类号： H04L9/12 , H04B10/63
摘要： Embodiments of this application disclose a quantum signal detection method and a quantum signal detection apparatus. The method in the embodiments of this application includes: splitting a received optical pulse sequence into a first pulse sequence and a second pulse sequence that are in orthogonal polarization, where the optical pulse sequence includes reference pulses and signal pulses whose time sequences are alternate and frequencies are the same, and the signal pulses are quantum signal pulses; obtaining information about the reference pulses; generating local oscillator light, where the local oscillator light is a pulse sequence whose time sequence is coincident with a time sequence of the optical pulse sequence; 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, where the first local oscillator light and the first pulse sequence are in a same polarization state, and the second local oscillator light and the second pulse sequence are in a same polarization state; 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.

5. 发明公开

EP3678306A1 APPARATUS AND METHOD FOR GENERATING A KEY 有权
公开(公告)号：EP3678306A1
公开(公告)日：2020-07-08
申请号：EP18880754.9
申请日：2018-06-08
申请人： Huawei Technologies Co., Ltd.
发明人： LI, Zhengyu , SU, Changzheng , ZOU, Yang , CAI, Yongjing
IPC分类号： H04B10/54
摘要： This application relates to a key generation device and method, and belongs to the field of quantum communications technologies. The 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, so 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, where the second key is a key obtained after a bit error occurs when the first key is modulated to the first light source signal, and the second key is a key to be used during communication with the receive-end device. According to the key generation method provided in embodiments of this application, a success rate of preparing and transmitting a key can be improved, thereby avoiding system resource waste.

6. 发明公开

EP3512154A1 ENCODING APPARATUS, AND QUANTUM KEY DISTRIBUTION DEVICE AND SYSTEM BASED ON SAME 有权
公开(公告)号：EP3512154A1
公开(公告)日：2019-07-17
申请号：EP17854788.1
申请日：2017-09-23
申请人： Huawei Technologies Co., Ltd.
发明人： LIANG, Wenye , SU, Changzheng , XIAO, Xinhua , FANG, Zhifang
IPC分类号： H04L9/08 , H04B10/70
摘要： The present invention discloses an encoding apparatus, including: a polarization splitter-rotator PSR, a polarization rotation structure, and a modulator, where the PSR is configured to: receive an input signal light, split the input signal light into two parts whose polarization modes are the same, and send the two parts to the polarization rotation structure and the modulator respectively; the polarization rotation structure, which is connected to the PSR and the modulator, has functions of rotating, by 180 degrees, a polarization direction of an optical signal entering the polarization rotation structure from one end, and keeping a polarization direction of an optical signal entering the polarization rotation structure from the other end unchanged; the modulator is configured to modulate a light input to the modulator; and the PSR is further configured to receive signal lights sent by the polarization rotation structure and the modulator, combine the two signal lights to obtain an output signal light, and send the output signal light. According to embodiments of the present invention, a high-rate modulator can be supported, to meet high-speed communication requirements.

7. 发明公开

EP3672145A1 CONTINUOUS-VARIABLE QUANTUM KEY DISTRIBUTION DEVICE AND METHOD 审中-公开
公开(公告)号：EP3672145A1
公开(公告)日：2020-06-24
申请号：EP18857049.3
申请日：2018-09-11
申请人： Huawei Technologies Co., Ltd.
发明人： LI, Zhengyu , SU, Changzheng
IPC分类号： H04L9/08
摘要： This application discloses a continuous-variable quantum key distribution (CV-QKD) device and method. The device includes a light source, a modulation unit, a first random number generator, and a processor, where the processor is configured to obtain a first data sequence based on a preset quantity of modulation format symbols, a distribution probability of each symbol, and a first random number sequence generated by the first random number generator, and obtain a second data sequence based on the first data sequence; and the modulation unit is configured to modulate, based on to the first data sequence, a signal emitted by the light source to output a second optical signal, where the second optical signal does not need to include quantum states with a quantity in an order of magnitude of 28 x 28 required in an existing Gaussian protocol. Therefore, implementation difficulty is low. In addition, this application further proposes an EB model equivalent to the device, thereby implementing strict provable security.

8. 发明公开

EP3629496A1 DATA TRANSMISSION METHOD, DEVICE, AND SYSTEM 有权
公开(公告)号：EP3629496A1
公开(公告)日：2020-04-01
申请号：EP18821585.9
申请日：2018-06-11
申请人： Huawei Technologies Co., Ltd.
发明人： LI, Zhengyu , SU, Changzheng , LU, Liangliang
IPC分类号： H04B10/70
摘要： This application discloses a data transmission method, an apparatus, and a system, and relates to the field of communications technologies, so as to avoid a channel resource waste. The method includes: generating, by a sending device, first random data and second random data; determining at least two pieces of reference data; generating a modulation signal based on the first random data, the second random data, and the at least two pieces of reference data; modulating, by the sending device, 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, 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; sending, by the sending device, the second laser signal; and determining, by the sending device, the at least two pieces of reference data. Any two of the at least two pieces of reference data meet the following condition: One piece of reference data ( X 1 , X 2 , Y 1 , Y 2 ) T is different from the other piece of reference data ( X 3 , X 4 , Y 3 , Y 4 ) T , and a matrix (I) constituted by ( X 1 , X 2 , Y 1 , Y 2 ) T and ( X 3 , X 4 , Y 3 , Y 4 ) T is a full-rank matrix.

9. 发明公开

EP3531614A1 ENCRYPTION AND DECRYPTION METHOD AND DEVICE 审中-公开
公开(公告)号：EP3531614A1
公开(公告)日：2019-08-28
申请号：EP17870453.2
申请日：2017-05-24
申请人： Huawei Technologies Co., Ltd.
发明人： SU, Changzheng , LU, Jiansong , XIAO, Xinhua
IPC分类号： H04L9/08
摘要： An encryption method and device and a decryption method and device are provided, to resolve a problem that unconditional security of encrypted service data cannot be ensured in an existing service data encryption process and encryption processing of highly confidential service data cannot be implemented. The encryption device in the present invention obtains a quantum key and to-be-encrypted service data; encrypts the to-be-encrypted service data by using the quantum key, to generate a ciphertext; inserts the ciphertext into a specified byte in an OTN overhead byte, and performs encapsulation to obtain an OTN frame including the ciphertext; and converts the OTN frame from an electrical signal to an optical signal, and transmits the optical signal to a second OTN device. The service data is encrypted by using the quantum key, and therefore unconditional security of service data transmission can be ensured. In addition, the ciphertext is inserted into the specified byte in the OTN overhead byte, and therefore encryption processing of a highly confidential service can be implemented.

10. 发明公开

EP2109241A1 AN ELECTRIC-OPTIC CONVERSION MODULE, AN OPTIC-ELECTRIC CONVERSION MODULE AND A CONVERSION METHOD 审中-公开
标题翻译：一个电 - 光转换模块，光电转换模块和转换过程
公开(公告)号：EP2109241A1
公开(公告)日：2009-10-14
申请号：EP08706711.2
申请日：2008-02-21
申请人： Huawei Technologies Co., Ltd.
发明人： ZHANG, Naisheng , SU, Changzheng , SHA, Xingyue
IPC分类号： H04J14/02
CPC分类号： H04J14/02 , H04B10/506 , H04J14/0227 , H04J14/0246 , H04J14/025 , H04J14/0257 , H04J14/0258 , H04J14/0276 , H04J14/0279
摘要： An electro-optic conversion module (30) is disclosed, including: an electric interface unit (31) configured to receive multiple electric signals to be converted and transmit each electric signal to be converted to a corresponding electro-optic conversion unit (32); electro-optic conversion units (32) configured to convert the electric signals from the electric interface unit (31) into optical signals; a multiplexer unit (33) configured to multiplex the optical signals from the electro-optic conversion units (32) into a wavelength division multiplexed signal; and an optical interface unit (37). An optic-electro conversion module and the conversion methods are also disclosed in the present disclosure. With the electro-optic conversion module (30), the optic-electro conversion module and the conversion methods of the present disclosure, the electro-optic conversions for multiple electric signals or the optic-electro conversions for multiple optical signals may be achieved in the same module.

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