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OPTICAL POWER LIMITER

Resumen de: US20260202693A1

An optical power limiter, a method of fabricating an optical power limiter, an optical device or system comprising an optical power limiter, and a method of limiting optical power using on optical power limiter. The optical power limiter comprises a first optical mode altering element configured to receive an input optical signal from a first waveguide; and an active medium coupled to the first optical mode altering element at a first end of the active medium such that a mode altered optical signal based on the input optical signal can enter the active medium, wherein a second end of the active medium is configured to couple the mode altered optical signal into a second waveguide as an optical output signal; wherein the active medium has a thermo-optic coefficient such that the mode altered optical signal entering the active medium experiences a refractive index gradient in the active medium as a result of absorption; and wherein the power of the optical output signal coupled into the second waveguide is limited to a maximum power value based on mode overlap of the mode altered optical signal and the second waveguide.

QUANTUM PROCESSOR CHIP AND MULTI-LAYER PHOTONIC ROUTING NETWORK

Resumen de: WO2026152033A1

A quantum processor chip is disclosed including a multi-layer photonic routing network. In one example, quantum node cores are arranged in slanted columns, and the arrangement may be derived at least in part from projecting a three-dimensional dual helix arrangement into two dimensions. The multi-layer photonic routing network provides different node-to-node connections on each layer, thereby enhancing the overall number of node-to-node connections while minimizing waveguide crossings and reducing cross talk. Disclosed embodiments employ vertical optical couplers and programmable photonic routers to flexibly route photonic signals between nodes. In some embodiments, integrated entanglement and qudit hardware regions may be provided. The architecture supports dynamic fallback routing, scalable control, and is compatible with various quantum technologies, enabling robust, high-fidelity quantum information processing within a compact footprint.

QUANTUM KEY DISTRIBUTION SYSTEM AND METHOD

Resumen de: WO2026149671A1

A continuous-variable Quantum Key Distribution system is provided, comprising a transmitter and a receiver. The receiver comprises a detection part and a lossy optical element arranged between the transmitter and the detection part. The transmitter modulates a quantum signal and sends it to the receiver through a quantum channel. The lossy optical element is configured to: distribute N input modulated quantum signals into M output modulated quantum signals, with N, M ≥ 1, wherein one of the N input signals is associated to the transmitter and the other N-1 signals are vacuum signals; and provide to the detection part one of the M output modulated quantum signals. The receiver detects, with the detection part, one or more quadrature components of the one modulated quantum signal, and performs a post-processing procedure with the transmitter based on the detected quadrature component(s) and an amount of optical loss of the lossy optical element.

A system and a method for satellite relayed quantum communication

Resumen de: GB2645040A

A satellite relayed quantum communication system comprises a network of one or more chains of near-synchronously moving satellites, equipped with a telescope module that effectively creates a satellite lens. The lens, comprising multiple mirrors, focuses light to contain beam divergence and directs it to the next satellite or to a receiving station, transmitting quantum information across variable distances. A tracking module ensures accurate signal transmission although tracking needs would be minimal within a particular satellite chain due to near-synchronously moving satellites. The system optimizes the relationship between lens diameter, satellite separation, and wavelength of light to minimize diffraction loss. High reflectivity Bragg mirrors minimize reflection loss, and the lens can be constructed using various telescope configurations. Beacon lasers aid in tracking.The system can be adapted for deep space communication. Additional features include positioning quantum light sources and light collection units differently for different protocols for diverse protocols, quantum memories for enhanced efficiency and capabilities, and frequency multiplexing modules for increased quantum information transfer rates.

ＢＢ８４プロトコル偏光状態をエンコードし補正するためのシステムおよび方法

Resumen de: WO2025012492A1

The invention relates to a system for encoding and correcting BB84 protocol polarisation states, which implements a method for measuring the polarisation error by carrying out said measurement before a step of transmitting the information and can be used in any system in which it is desired to implement quantum key distribution (QKD).

ENTANGLEMENT APPARATUS WITH REFLECTORS ON A QUANTUM DEVICE

Resumen de: WO2025230561A2

Example embodiments provide methods, systems, apparatuses, products and/or the like for reflecting, collecting, entangling, and/or detecting photons generated by quantum objects. In various embodiments a quantum entanglement apparatus is provided. The quantum entanglement apparatus comprising a first reflecting component on a first surface of a first quantum object confinement component, the first reflecting component configured to reflect a first emitted photon emitted by a first quantum object, a first photonic integrated circuit on a first side of the first quantum object confinement component, a first collection component optically coupled to the first photonic integrated circuit, wherein the first collection component is configured to collect the first emitted photon reflected by the first reflecting component, a first detector configured to detect photons traversing a first optical path of the first photonic integrated circuit, and a first filter along the first optical path.

量子光的偏振态调整方法、装置及量子通信卫星

Resumen de: CN122394768A

本申请涉及量子通信技术领域，公开了一种量子光的偏振态调整方法、装置及量子通信卫星，量子通信卫星测量发射的量子光的偏振态，量子光由量子通信卫星中的光源产生并发射，确定量子光的偏振态相对于量子光的预设偏振状态的变化矢量，根据变化矢量，调整光源产生并发射的量子光的偏振态；量子通信卫星利用量子光作为偏振补偿的基矢光信号，光源在发射量子光时考虑了偏振态发生的改变，使发出的量子光的偏振态始终保持在预设偏振状态，实现量子光高偏振对比度、降低量子光的偏振误码率，不需额外硬件设备，节省硬件成本，通过量子通信卫星就可实现偏振态补偿，降低地面站工作人员的工作量，提高地面站工作人员的体验感。

一种抗高功率拉曼噪声的自适应波分复用系统及方法

Resumen de: CN122394676A

本发明属于量子领域，公开了一种抗高功率拉曼噪声的自适应波分复用系统及方法，系统包括发送端和测量端；发送端生成量子信号脉冲，并与高功率经典数据信号合波后通过单模光纤传输，且响应于调节指令自适应调整诱骗态脉冲的发送概率与光子数分布比例；测量端用于：将经典信号与量子信号解复用分离；监测经典光激发的反向拉曼散射及瑞利散射背景，并动态计算单门背景噪声计数概率；对量子信号进行双光场单光子干涉探测，调整判决逻辑边界，提取单光子干涉事件与双光子符合事件，剔除受拉曼噪声污染的误码事件，并提取有效信号光强；对观测总增益和观测误码率进行置信区间估计，计算最终安全密钥率，并在安全密钥率下降时生成调节指令。

光电共封装光子收发器件、制备方法及光电共封装交换机

Resumen de: CN122386487A

本申请公开了一种光电共封装光子收发器件、制备方法及光电共封装交换机，器件包括：光电混合玻璃基板，集成有基板边缘波导、片上波导和光复用/解复用器，光复用/解复用器分别与片上波导和基板边缘波导连接；硅光 PIC 芯片，集成有芯片边缘波导、多个光调制器以及多个光探测器，芯片边缘波导分别与光调制器和光探测器连接，且芯片边缘波导与片上波导通过倏逝波耦合实现光路连接；光复用/解复用器用于将经单根光纤输入的多波长光源解复用为多路单波长光，传输至光调制器调制为高速光信号后，再合波输出；以及同时用于将输入的多波长光信号解复用为多路单波长光，传输至光探测器转换为电流信号。本申请能够提高光电共封装光子收发器件的带宽密度。

一种公路交通流量监测方法及系统

Resumen de: CN122392305A

本发明公开了一种公路交通流量监测方法及系统，涉及智能交通监测技术领域。本发明通过部署量子纠缠态传感器网络，利用探测粒子穿越路网空间并与车辆运动激发的微弱电磁扰动耦合，计算贝尔参数序列并提取有效退相干事件，进而映射得到交通流量时间序列；通过延迟嵌入定理进行相空间重构，结合持久同调理论追踪单纯形复合体演化的拓扑特征，生成动态图网络结构；利用时空图卷积网络与量子启发式模拟退火算法越过局部能量壁垒，输出路网结构性突变的概率图数据；最终基于预测结果闭环调节传感器网络感知参数。本发明彻底突破了传统检测盲区，提前识别潜在涡流死锁，实现了全天候的交通前兆感知与动态自适应资源调度。

密钥接收端、量子密钥分发系统和量子密钥分发方法

Resumen de: CN122394772A

本申请提供了一种密钥接收端、量子密钥分发系统和量子密钥分发方法，该接收端包括调制泵浦源，用于生成双脉冲泵浦光序列；频率上转换源，用于基于双脉冲泵浦光序列对接收到的时间编码的量子态的量子光信号进行和频，以在前后两个时间窗口上产生偏振相互正交的量子态，从而得到两个时间窗口上的相对相位发生变化的和频光序列；测量模块，用于对和频光序列进行测量，得到测量结果，并根据测量结果生成量子密钥。

一种基于压电扫描台的小型机载光通信系统

Resumen de: CN122372080A

本发明公开了一种基于压电扫描台的小型机载光通信系统，包括粗跟模块、精跟模块和信号收发模块；通信发射端的多模激光器发射粗信标光，经发射透镜的准直后出射，在自由空间中传播一段距离后照射到对面接收望远镜的粗跟模块中，接收望远镜中的粗跟接收镜头将粗信标光聚焦到粗跟相机靶面中，接着根据聚焦光斑的位置误差信号来调整云台的指向角，完成通信双方的初始捕获和对准。本发明小型轻量化，整个系统的重量控制在1 kg左右，高跟瞄精度，精信标回路中的相机能分辨出高达4.7 µrad的光线视场角变化；低链路损耗，能够精准调节单模光纤的位置，使得耦合效率最高，同时系统中的所有镜片都镀了响应波长的增透膜，提高了系统本身的透过率。

一种基于量子压缩感知的认知无线电频谱感知装置及方法

Resumen de: CN122372119A

本发明公开了一种基于量子压缩感知的认知无线电频谱感知装置及方法，属于认知无线电技术领域。针对现有技术中存在的问题，通过设计一种基于量子压缩感知的认知无线电频谱感知装置，所述装置包括宽带天线模块、电光调制微波光子转换模块、数据采集模块和认知无线电信号检测算法模块，各模块依次连接，共同完成从信号接收到频谱分析的全过程；本发明利用量子压缩感知实现亚奈奎斯特采样和高压缩率的宽带多频率微波信号频谱测量，同时实现当光子计数率提升至2 Mcps、积分时间40 ms时，检测概率逼近100%，为认知无线电频谱感知、决策和切换提供了一种新的策略。

基于被动偏振编码的BB84量子密钥分发系统及方法

Resumen de: CN122372203A

本发明涉及量子密钥分发，具体涉及基于被动偏振编码的BB84量子密钥分发系统及方法，包括发送端Alice、接收端Bob和量子信道，发送端Alice包括被动编码发射机，被动编码发射机包括预报单光子源模块和全被动偏振编码模块；预报单光子源模块，产生信号‑闲置单光子对，信号光子由单光子探测器探测，其探测事件作为整个系统的预报时间基准，闲置光子进入全被动偏振编码模块；全被动偏振编码模块，将闲置光子随机分配至相应光路，并在光路内映射为BB84的四种偏振态中的一种，同时使得每种偏振态对应一个固定时间延迟，形成时间延迟标签；本发明提供的技术方案能够有效克服现有技术所存在的难以兼顾完全被动、高安全性、低系统复杂度和工程实用化的缺陷。

宽带相位匹配控制方法、系统、设备及存储介质

Resumen de: CN122372102A

本发明实施例提供一种宽带相位匹配控制方法、系统、设备及存储介质，属于集成光子学技术领域。所述方法包括：获取色散参数和泵浦参数，计算对应各频率点的相位失配参数；计算对应各频率点的最优非线性作用长度，并构建频率与最优非线性作用长度之间的映射关系；构建空间作用长度调度函数，并将空间作用长度调度函数转换为对应非线性作用过程的控制参数分布，以对非线性波导中的非线性作用过程进行调度控制；在执行调度控制过程中，获取对应各频率通道的输出参数，并对空间作用长度调度函数进行更新，以输出多频通道输出结果。本发明方案在宽带条件下实现多频通道非线性作用过程的自适应调度控制，从而提升各频率通道输出的一致性与稳定性。

一种量子网络拥塞感知动态纠缠纯化提升吞吐量方法

Resumen de: CN122372487A

本发明公开了一种量子网络拥塞感知动态纠缠纯化提升吞吐量方法，属于量子网络通信技术领域。本方法包括：构建包含节点数、链路数及节点交换成功率的量子网络模型，初始化网络全局变量与网络参数；生成不同节点对之间的通信请求并设置保真度阈值；基于加权优先级公式综合路径长度与纠缠交换成功率选择低成本纠缠路径；通过保真度逐跳退化特性确定纯化位置，利用概率纯化特性确定纯化次数，并引入链路拥塞因子动态调整纯化策略以缓解网络拥塞。本发明有效降低了建立不相邻节点间纠缠的时间与资源成本，显著提高了满足保真度要求的网络吞吐量，实现了纠缠资源的高效利用与多并发请求的良好支持。

一种基于步长自适应符号恒模算法的数字信号偏振恢复方法

Resumen de: CN122372189A

本发明属于连续变量量子密钥分发技术领域，具体涉及一种基于步长自适应符号恒模算法的数字信号偏振恢复方法。针对现有偏振恢复算法在计算复杂度与收敛性能之间难以平衡的问题，本发明通过引入一种由线性项与二次项加权构成的误差调控步长更新策略、基于符号信息的系数更新方法以及基于接收信号总功率的归一化误差函数，在提升收敛速度与稳态性能的同时降低了计算复杂度，实现了高性能、低复杂度的实时偏振恢复。

量子通信方法和装置

Resumen de: CN122372988A

本申请实施例提供一种量子通信方法和装置。该方法包括：通过第一终端部署的量子随机数生成组件生成第一量子随机数，并接收来自第二终端的第一数值，即可根据第一数值与第一量子随机数确定加密密钥，并根据加密密钥对待传输至第二终端的通信数据进行加密处理，生成加密数据，其中，第一数值是基于第二终端上部署的量子随机数生成组件生成的第二量子随机数确定的，加密数据用于传输至第二终端解密，以使第二终端获取通信数据。该方法能够提升量子通信过程安全性。

一种可调焦距透镜阵列与Micro-LED阵列耦合系统

Resumen de: CN122362603A

本发明涉及透镜耦合领域，具体的说是指一种可调焦距透镜阵列与Micro‑LED阵列耦合系统，包括透镜阵列层及设置在透镜阵列层一侧表面的驱动模块阵列层，所述驱动模块阵列层的一侧表面设置有散热缓冲复合层，所述散热缓冲复合层的一侧表面设置有Micro‑LED阵列，所述透镜阵列层、驱动模块阵列层、散热缓冲复合层和Micro‑LED阵列之间填充有透明胶水；所述透镜阵列层包括多个透镜单元。定位连接在底层Micro‑LED阵列基板与第二层散热缓冲复合层，可以通过导热绝缘粘接层全贴合固定，复合层中的避让孔与Micro‑LED发射单元采用同轴定位工艺，定位精度±0.5μm，确保光轴同轴，而第二层散热缓冲复合层与第三层驱动模块阵列层，通过微型定位销机械定位+导电胶粘接固定。

ENHANCING SECURITY OF QUANTUM COMMUNICATION CHANNELS

Resumen de: US20260197345A1

0000 Methods, apparatus, and computer program products for quantum communications and quantum information processing are provided. An example method includes determining a received state of a qubit received via a quantum communication link where the received state includes one or more properties of the received qubit. The method further accesses a transmitted state of the qubit where the transmitted state includes one or more properties of the qubit as transmitted. The method continues by comparing the one or more properties of the qubit in the received state with the one or more properties of the qubit in the transmitted state. Finally, the method detects a condition of the quantum communication link based on the comparison between the received state and the transmitted state. In doing so, the embodiments operate to characterize the noise level, security, etc. of a quantum communication interconnect, link, or channel.

SYSTEMS AND METHODS FOR ROUTING SINGLE PHOTONS FROM A TRAPPED ION USING A PHOTONIC INTEGRATED CIRCUIT

Resumen de: US20260194784A1

0000 A system includes a quantum source and an optical device coupled to the quantum source. The quantum source is configured to emit an entangled photon. The optical device is configured to route the entangled photon to one or more outputs. In some aspects, the optical device can include a photonic integrated circuit (PIC). Advantageously the system can provide a routing scheme to route (e.g., passively, actively, dynamically, or a combination thereof) entangled photons from one or more quantum sources (e.g., trapped ion, single-photon source, quantum emitter, etc.) between different nodes, a quantum frequency conversion scheme to match near-infrared photons (750 nm to 1260 nm) and/or telecommunication photons (1260 nm to 1675 nm) entangled with photons from one or more quantum sources to an operating wavelength of the optical device (e.g., PIC), programmable routing and entanglement distribution, and scalable long-distance quantum networks.

APPARATUS AND METHOD FOR PERFORMING ENTANGLEMENT PERCOLATION-BASED ENTANGLEMENT ROUTING STRATEGY USING LOCAL INFORMATION IN QUANTUM COMMUNICATION SYSTEM

Resumen de: WO2026146666A1

The present disclosure relates to an apparatus and method for performing an entanglement percolation-based entanglement routing strategy using local information in a quantum communication system. Specifically, the present disclosure relates to an apparatus and method in which each intermediate node involved in distributing remote entanglement between any two distant transmitting and receiving nodes on the basis of entanglement percolation in a quantum communication system determines a local operation and classical communication (LOCC) strategy thereof on the basis of local information. The present disclosure relates to an apparatus and method for determining an operation mode of a specific node as one of a repeater mode, a vertex mode, or a hybrid mode using only information between the specific node and neighboring nodes, and performing entanglement routing on the basis of an LOCC strategy corresponding to each mode.

APPARATUS AND METHOD FOR PERFORMING ENTANGLEMENT DISTILLATION PROTOCOL IN ENTANGLEMENT DISTILLATION PROTOCOL MODE DETERMINED ON BASIS OF YIELD OF ENTANGLEMENT DISTILLATION PROTOCOL IN QUANTUM COMMUNICATION SYSTEM

Resumen de: WO2026146687A1

According to various embodiments of the present disclosure, a method performed by a first node is provided, the method comprising the steps of: transmitting, to a second node, information related to initial fidelity and target fidelity of an Einstein-Podolsky-Rosen (EPR) pair, the number of rounds in which an entanglement distillation protocol (EDP) is performed, and an EDP type; transmitting, to the second node, information related to the entanglement state of the EPR pair; determining an optimal EDP mode for optimal EPR yield; transmitting, to the second node, information about the optimal EDP mode for the optimal EPR yield; and performing the EDP on the basis of the optimal EDP mode.

FASTER-THAN-LIGHT COMMUNICATION METHOD

Resumen de: WO2026146581A1

Problem To achieve a communication method that makes it possible for communication speed to exceed the speed of light. Solution A plurality of quantum particles having quantum entanglement are disposed such that one or more quantum particles are disposed on each of a transmission side and a reception side and the quantum entanglement is present at least between the transmission side and the reception side. When information is transmitted, the quantum entanglement is changed by an operation for changing the identifiability of a quantum state on the transmission side. When the information is not transmitted, the operation is performed on the transmission side such that the quantum entanglement becomes different from that when the information is transmitted (the operation includes doing nothing since it is only necessary that the quantum entanglement is different from that when the information is transmitted). Measurement is performed on the reception side after the operation on the transmission side, and information for detecting the transmission of the information from the transmission side is obtained. In this way, a communication speed exceeding the speed of light can be achieved.

PHOTONIC COMMUNICATION PLATFORM AND RELATED ARCHITECTURES, SYSTEMS AND METHODS

Nº publicación: US20260197092A1 09/07/2026

Solicitante:

LIGHTMATTER INC [US]
Lightmatter, Inc.

Resumen de: US20260197092A1

0000 Photonic interposers that enable low-power, high-bandwidth inter-chip (e.g., board-level and/or rack-level) as well as intra-chip communication are described. Described herein are techniques, architectures and processes that improve upon the performance of conventional computers. Some embodiments provide photonic interposers that use photonic tiles, where each tile includes programmable photonic circuits that can be programmed based on the needs of a particular computer architecture. Some tiles are instantiations of a common template tile that are stitched together in a 1D or a 2D arrangement. Some embodiments described herein provide a programmable physical network designed to connect pairs of tiles together with photonic links.