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89
resultados
Última actualización
14/07/2026 [08:30:00]
Resultados 50 a 75 de 89
Resumen de: WO2026135455A1
This disclosure pertains to a method for real-time state-validation of entanglement between at least two independent distant quantum nodes in an extendible quantum network. Each quantum node comprises at least a communication qubit. The quantum network comprises a midpoint, comprising a measurement apparatus for measuring a herald in a quantum signal, and a digital logic unit for calculating the measurement result. The method comprises the steps of receiving a hybrid signal comprising a quantum signal and a classical signal; measuring, each of the quantum signals to validate entanglement; validating the entanglement based on the outcome of the measurement and on the state-validation information of the classical signal; sending a classical message about the validation of the entanglement attempt.
Resumen de: WO2024261360A1
Pilot-tone-assisted demodulation procedure for coherent optical communication systems, specifically continuous-variable quantum key distribution (CV-QKD) systems, which allows compensation of random phase fluctuations in the lasers they use after acquiring the signal, solving the frequency-locking problem in a simple, efficient, and cost-effective manner.
Resumen de: EP4765677A1
An optical transmitter comprising an active optical device configured to generate a linearly polarized optical signal, a quarter wave plate, a first polarization maintaining optical fiber, and a beam expander configured to transmit a circularly polarized optical signal, wherein the first polarization maintaining optical fiber is configured to pass the linearly polarized optical signal generated by the active optical device to the quarter wave plate and the quarter wave plate is configured to convert the linearly polarized optical signal into the circularly polarized optical signal; or the quarter wave plate is configured to convert the linearly polarized optical signal generated by the active optical device into the circularly polarized optical signal and the first polarization maintaining optical fiber is configured to pass the circularly polarized optical signal to the beam expander.
Resumen de: EP4765679A1
0001 La présente invention concerne un système de réception quantique comprenant un premier récepteur optique (102), le premier récepteur optique (102) comprenant un premier télescope (107). Le système de réception quantique comprend de plus un second récepteur optique (102) et le second récepteur optique (102) comprenant un second télescope (107). Chaque récepteur (102) communique à une unité de traitement (103) les signaux détectés par un analyseur quantique (104) et l'unité de traitement (103) combinant les signaux détectés. Le premier récepteur optique (102) et le second récepteur optique (102) comprennent de plus respectivement une première monture et une seconde monture (110) pour orienter le premier et le second télescope (107), et chaque télescope (107) du système de réception est orienté selon une direction propre de réception de photons.
Resumen de: GB2632664A
A pair of pulses, of differing phase but identical polarisation, are generated 126, 127. The pulse pair is passed through a polarisation adjuster / polarisation controller 140 and then an interferometer 160. At the input to the interferometer a PBS splits each received pulse into orthogonal polarisation components (|Vn>, |Hn>). One arm of the interferometer includes a delay element which delays one of the polarisation components sufficiently to enable interference between two pulses of the pair. The interferometer outputs an interference pulse with a polarisation state 166 which is dependent on a phase difference ϕ1 between the input pulses. Different polarisation states can be coded by setting different phase differences ϕ1 , ϕ2 between input pulse pairs. The invention may be applied to quantum key distribution (QKD). Preferably a sequence of pulses is input to the interferometer. The pulses are preferably generated by injection locking a first laser diode 121 (which controls the phase difference between consecutive pulses) to a second laser diode 123, via a circulator 125.
Resumen de: EP4765684A1
0001 La présente invention concerne un système de préparation de photons pour une communication quantique, le système comprenant une source de lumière polarisée (210), et une tête d'émission optique (211) comprenant un télescope (213) émettant les photons dans un canal. Le système comprend de plus un système de modulation de phase (205ad) appliqué à des photons produit par la source (210), ainsi qu'une première lame optique (202a, 204a, 204b) et une seconde lame optique (202b, 204c, 204d). La première lame optique (202a, 204a, 204b) sépare les photons suivant des chemins optiques distincts et la seconde lame (202b, 204c, 204d) recombinent les photons des chemins optiques ayant subi un traitement par le système de modulation de phase (205a-d). À l'issu du trajet entre la source (210) et la tête d'émission optique (211), la modulation de phase est adaptée à chacun des chemins distincts (215a-215d) pour contrôler la polarisation des photons émis dans le canal aux fins de la communication quantique.
Resumen de: CN122267616A
本发明提出了一种InP基相位可调光子集成光子真量子随机数发生器芯片及其制备方法，属于半导体激光器的技术领域，用以解决空间光学随机发生器制造成工艺复杂、尺寸大及功耗高的技术问题。本发明真量子随机数发生器芯片包括集成在InP衬底上的DFB激光器、1分2结构MMI分路器和探测器，各组件沿光信号传输方向依次耦合；所述1分2结构MMI分路器包括依次连接的输入波导、多模干涉区和两根对称排布的输出波导，所述输入波导与DFB激光器的输出端光耦合；所述探测器包括两组PD光电探测器，用于接收MMI分路器分束后的真随机光子光信号本发明结构具备结构简单可靠，集成度高、制备成本低等优势。为实现高集成度、小尺寸的真随机数发生器芯片提供一种简单可靠的可行性结构及加工工艺方案。
Resumen de: CN122267612A
本申请提供一种稳频激光器装置与量子通信系统，涉及激光器技术领域。稳频激光器装置包括：第一分布式反馈激光器用于产生第一激光；第二分布式反馈激光器用于产生第二激光；内层闭环环路用于将第一分布式反馈激光器和第二分布式反馈激光器分别进行腔模锁定，以抑制噪声和腔长扰动，完成短期稳定调控；外层闭环环路用于根据基准频率对第一激光和第二激光进行拍频处理，使第一激光和第二激光的频率保持稳定，以抑制第一分布式反馈激光器和第二分布式反馈激光器的长期热漂移，完成短期与长期稳定度统一。本申请能够解决现有激光器无法同时实现短期低噪声和长期低漂移、稳腔效果不佳、频差监测困难等技术问题，实现激光信号短期稳定与长期稳定的统一。
Resumen de: CN122268493A
本发明涉及一种基于太赫兹量子级联激光器的光通信系统，包括：发射模块，用于基于单模太赫兹量子级联激光器产生携带调制信号的太赫兹波；接收模块，用于基于光频梳太赫兹量子级联激光器接收所述太赫兹波，并通过内部多外差拍频将所述太赫兹波转化为射频信号；PLL锁相环路，用于基于所述射频信号产生误差信号以稳定所述光通信系统的相对频率漂移；信号处理解调模块，用于对所述射频信号进行时域波形的实时采集与频域数据解码。本发明能够实现宽带、高灵敏度的太赫兹相干通信，完成对射频微波信号的高效传输与解调。
Resumen de: CN122268491A
本公开涉及光子集成电路芯片、光互连模块、光互连装置、计算装置和系统。该系统中的多个计算装置采用光互连装置进行光纤连接，通过对光互连装置中的光交换单元进行控制来切换外部光链路，可改变多个计算装置的通信路径。
Resumen de: KR20260095676A
양자 통신 시스템이 제공된다. 양자 통신 시스템은 두 개의 전달 노드들, 하나의 측정 노드, 및 전달 노드들 각각에 서로 다른 시간 구간을 차지하는 보조 펄스 빈들을 할당하는 동기화 신호 할당 장치를 포함할 수 있다. 각각의 전달 노드들은 단일 광자 생성 장치 및 보조 광신호 생성 장치를 포함할 수 있고, 측정 노드에서 수행되는 보조 광신호에 대한 측정 결과를 기반으로 외부 환경 변화에 따른 단일 광자 신호의 도착 시간 드리프트를 보상하고 벨 상태 측정을 효율적으로 수행할 수 있다.
Resumen de: CA3292038A1
The invention relates to a method for operating a photonic circuit (50), in particular four-wave mixing, to generate entangled states of light (1-8), said method comprising steps for the periodic generation of several spatially squeezed and separated states of light (1-8), for spatially separated squeezed-light generation (1-8) in the photonic circuit (50), for pairwise conversion of the squeezed states of light (1-8) into two-mode squeezed states (EPR pairs) and for application of at least one temporal multiplexing operation to at least two EPR pairs, specifically to two states of light (1-8) of different EPR pairs, for generation of an entangled cluster state.
Resumen de: CN122247512A
本发明公开一种群组可控选择性坍缩量子内嵌抗损耗深空安全激光保密通信系统，属于深空量子保密通信领域。系统采用地面制备纠缠量子群组、本地留存触发坍缩、同轴激光深空传输、天基双缝干涉符合计数检测的架构。通过地面端对本地量子的主动破坏性偏振测量，实现远程量子态的非局域坍缩控制以完成二进制编码（坍缩对应1，未坍缩对应0）。利用群组符合计数统计克服深空传输损耗与背景噪声，利用时分复用门控探测规避激光强光淹没。系统全程常温常压运行，基于民用器件即可实现物理级高安全、远距离、抗干扰的深空激光保密通信，适用于深空探测、天基安防、远距离无人设备测控及民用保密通信场景。
Resumen de: CN122248026A
本发明公开了一种工业互联设备及其使用方法，属于工业互联技术领域，包括：处理器、存储器，以及集成于设备硬件平台的以下功能模块：联邦学习客户端模块：用于在本地训练工业设备状态预测模型，生成加密的模型梯度更新数据；量子安全通信模块：包括后量子密码加密芯片和量子随机数发生器，所述PQC加密芯片配置为对所述模型梯度更新数据执行基于格密码的加密运算，所述QRNG为加密过程提供真随机熵源，效果是兼顾安全与实时：通过硬件级加密与业务时隙协同，在实现抗量子安全的同时，保障工业控制的硬实时性能，并且融合量子通信、物理指纹与区块链技术，进而实现了从通信、身份到行为的端到端可信验证与溯源。
Resumen de: CN122248406A
本发明公开了一种量子态调控的物联网无线通信抗干扰传输方法，涉及物联网无线通信技术领域，包括如下步骤：物联网节点多维度实时采集电量、任务优先级及信道干扰数据并融合；基于量子态复杂度‑能耗模型生成调控编码策略，低功耗时启用轻量化加密；边缘服务器预测最优参数，节点据此完成量子态生成、编码与传输；最后采集传输性能数据，通过评估与优化算法更新参数，形成全链路闭环调控；本发明通过多维度数据采集与动态融合，智能匹配量子态调控等级与编码组合，低功耗时启用量子随机数加密，提升通信可靠性，利用边缘服务器混合预测模型与闭环优化，精准预判调控参数并持续迭代模型，兼顾关键指标，满足物联网高可靠、低功耗通信需求。
Resumen de: CN122247522A
本发明公开了一种基于三维电子‑光子纠缠态的高容量隐形传态方法：步骤1：Alice制备电子‑光子纠缠对并将其拆分为光子序列P和电子序列E；步骤2：Alice将电子序列E发送给Bob；步骤3：Alice选择酉操作并作用于光子序列P，得到光子序列，Bob得到电子序列；步骤4：Bob使用相移电子全息术对电子序列进行干涉测量，采集干涉全息图；步骤5：Bob告知Alice测量光子序列，并将光子数态及位置告知Bob；步骤6：Bob对干涉全息图进行相位重建，解码出原始信息。本发明通过合理设计编码相位间隔，通过置信系数调控极低的解码失败率，超越了传统3维光子贝尔态超密集编码的2log23比特编码容量理论极限，能够以0.27%的误码率达到8.5比特的理论编码容量。
Resumen de: CN122247618A
本申请提供一种基于PON网络的量子融合密钥加密方法、装置及系统，应用于加密技术领域，通过从量子密码服务平台获取量子密钥，并与AES标准算法生成的随机密钥进行异或融合，生成具备高不可预测性和高复杂度的AES量子融合密钥，既保留了AES的算法兼容性，又大幅提升了密钥复杂度，再同步至局端设备确保两端密钥一致，最后，直接调用标准AES算法，使用AES量子融合密钥对PON数据帧进行加密或解密，从而能够在不改动AES内核前提下，有效提升PON网络加密的安全等级。
Resumen de: CN122247524A
本发明提供了一种波长参考信号和时间信号的复用方法和系统，属于量子通信技术领域，复用系统包括接收端与发送端，接收端由种子激光器、强度调制器及分束器构成，通过外部时钟信号对连续光进行强度调制，生成兼具波长参考与时间信息的参考光信号并发送至发送端；发送端包含光区分部分与波长锁定部分，光区分部分将参考光信号分束，一路用于提取时间信号以实现本地时钟同步，另一路用于干涉；波长锁定部分通过干涉拍频、探测、滤波、鉴相及PID反馈，分别驱动本地激光器与声光调制器完成波长快速与慢速锁定。本发明通过单路参考光信号同时实现波长校准与时间同步复用，简化系统结构，降低光路复杂度，提升波长锁定精度与时间同步稳定性。
Resumen de: CN122247523A
本申请公开了一种多协议集成芯片，涉及量子保密通信与集成光电子学技术领域。该芯片包括阵列波导光栅与合束输出单元，阵列波导光栅接收经同一孔径传输的偏振量子信号、时间仓量子信号和经典量子信号并完成光谱汇聚，通过两路端口分别输出偏振量子信号的两个相干正交分量，其中一路端口合束输出偏振量子信号另一分量、时间仓量子信号与经典量子信号；合束输出单元还原偏振量子信号，并将多类信号合束输出至光纤。本申请可兼容多编码协议，可切换适配不同测试与封装场景，同时提升量子密钥分发系统的通用性与信噪比。
Resumen de: US20260169345A1
Circuits and methods that implement multiplexing for photons propagating in waveguides are disclosed, in which an input photon received on a selected one of a set of input waveguides can be selectably routed to one of a set of output waveguides. The output waveguide can be selected on a rotating or cyclic basis, in a fixed order, and the input waveguide can be selected based at least in part on which one(s) of a set of input waveguides is (are) currently propagating a photon.
Resumen de: US20260172122A1
A system and method for distributing quantum entanglement using optically protected fiber optical paths is described. In some embodiments, multiple optical paths are used to connect a source site to a receiver site. Quantum entangled particles are transmitted from the source site to the receiver site using a first one of the multiple optical paths and related service channel information is transmitted from the source site to the receiver site using a second one of the multiple optical paths. In response to a failure of either the first or second optical path, an entanglement distribution controller automatically updates the routing such that the service channel information and the quantum entangled particles are routed concurrently on a remaining one of the first or second optical path.
Resumen de: DE102024138694A1
Eine Sendevorrichtung (2a) zur Bereitstellung eines kodierten optischen Ausgangssignals (L3), insbesondere für einen Quantenschlüsselaustausch, eine Sendestation (7a), insbesondere Satellit (9b), mit entsprechender Sendevorrichtung (2a) sowie ein Kommunikationssystem (1) zur Bereitstellung kodierter optischer Kommunikation werden vorgeschlagen, wobei die Sendevorrichtung (2a) eine als Doppelpulsquelle ausgestalteten Lichtquelle (110) zur Bereitstellung eines Doppelpulspaare (D) und/oder Einzelpulse (P) umfassenden optischen Eingangssignals (L0), und eine Modulationseinheit (120) zum Modulieren der Phasenanteile der Polarisationskomponenten des optischen Eingangssignals (L0) im Zuge einer Kodierung des optischen Ausgangssignals (L3) umfasst, und wobei die Modulationseinheit (120) dazu ausgestaltet ist, wahlweise eine polarisations-, phasenbasierte Kodierung (X, Y) und/oder Time-Bin-Kodierung der Pulse (P) des optischen Ausgangssignals (L3) zu ermöglichen.
Resumen de: WO2026126866A1
In a ground station that receives light from satellites, the coupling efficiency between a telescope and an optical fiber or an optical communication sensor is increased. Light emitted from an optical transmitter 41 passes through a telescope 11, is reflected by an optical reflection unit 43, and enters and is received by a tracking camera 21 via a first optical system 23. A drive control unit 31 controls a second optical system 27 so that the light reflected by the optical reflection unit 43 is incident on the center of a sensor unit 25 while continuing to control the first optical system 23 so that the light received by the tracking camera 21 is located at the lens center. While maintaining the control of the second optical system 27, the drive control unit 31 causes the telescope 11 to perform an operation that simulates orbit tracking. On the basis of the attitude of the telescope 11 and the light reception position in the sensor unit during the orbit tracking step, the drive control unit 31 obtains drive control information for controlling one or more of the first optical system 23, the second optical system 27, and the attitude of the telescope 11.
Resumen de: WO2026128625A1
Methodology of generation, with the use of a degenerate four-wave mixing nonlinear process, of ultrafast synthesized quantum light pulses with attosecond resolution (as demonstrated - at petaHertz and sub-petaHertz frequencies) and that exhibit amplitude squeezing. Demonstration of controllability and tunability of quantum uncertainty of light in real time via switching between amplitude and phase squeezing. Example of an attosecond quantum encryption protocol leveraging squeezed synthesized light for secure digital communication at petahertz-speeds.
Nº publicación: US20260172121A1 18/06/2026
Solicitante:
NEC CORP [JP]
NEC Corporation
Resumen de: US20260172121A1
A quantum key distribution device includes an optical modulator for modulating an optical signal and transmitting the modulated optical signal, and a controller unit for controlling the modulation. The controller controls, at a first timing, modulation of an optical signal in accordance with a first optical modulation rule in a first correspondence relationship including plural optical modulation rules each of which defines association between a first combination of a basis type and an signal state and a second combination of a value of a second bit corresponding to the basis type and a value of a first bit corresponding to the signal state, the plural optical modulation rules being different in association, and controls modulation of an optical signal in accordance with a second optical modulation rule different from the first optical modulation rule among the plural optical modulation rules of the first correspondence relationship at a second timing.
BOPI
Sede Electrónica
