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Tunable Broadband Comb Source Using Compact FP-SA Laser for High-Precision Quasi-Distributed FBG Sensing

IEEE Sensors Journal 2025年第11期25卷 19110-19116页

作者： Liu, Yuan Dai, Pan Xu, Kaichuan Wang, Jiacheng Wang, Yu Tang, Kaifei Dong, Junwei Sun, Zhenxing Wang, Feng Chen, Xiangfei Nanjing University Key Laboratory of Intelligent Optical Sensing and Manipulation of the Ministry of Education Engineering Research Center of Precision Photonics Integration and System Application of the Ministry of Education College of Engineering and Applied Sciences Institute of Optical Communication Engineering Nanjing University-Tongding Joint Lab for large-scale photonic integrated circuits National Laboratory of Solid State Microstructures Jiangsu Nanjing210093 China

We develop a novel broadband comb light source for sensing multiple fiber Bragg gratings (FBGs). This broadband light source is realized through a Fabry-Pérot laser with intracavity saturable absorbers (FP-SA), which is a new type of low-cost and highly integrated semiconductor laser solution. The laser chip measures 1500 μm in length and 300 μm in width. Based on a waveform shaper and the FP-SA laser, we successfully generated the output of a broadband comb light source. By adjusting the filter bandwidth, laser gain voltage, and reverse voltage, we were able to tune the output bandwidth of the light source across a wide range from 2.5 nm to 25 nm. We propose a fitting method that leverages peak value extraction, tailored to the unique output characteristics of this source. Experimental results demonstrate that, when utilizing the FP-SA laser with a comb wavelength spacing of 0.23 nm, the demodulation repeatability achieves ±3.5 pm, and the demodulation linearity exceeds 0.9996. To the best of our knowledge, this work presents a new high-performance integrated broadband light source option for quasi-distributed FBGs array sensing systems. © 2001-2012 IEEE.

关键词： Demodulation

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A Digital Twin Assisted Link Status Visualization Framework for Failure Monitoring in optical networks: the ROADM Case

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Journal of Lightwave Technology 2025年

作者： Cai, Meng Liu, Xiaomin Fu, Mengfan Zhang, Yihao Yi, Lilin Hu, Weisheng Zhuge, Qunbi Shanghai Jiao Tong University State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai200240 China

Reconfigurable optical add-drop multiplexers (ROADMs) based on wavelength selective switches (WSSs) serve as the cornerstone for dynamic signal routing in all-optical networks. With growing demands for higher capacity and flexibility, the deployment of large-scale, high-degree ROADM networks has significantly increased. However, this expansion increases the impact of failures in ROADMs, which may cause widespread service disruption across all fibers connected to a ROADM node. Therefore, it is crucial to monitor and visualize the status of all ROADMs in optical networks. Current approaches are limited by their reliance on scarce real-system failure data or the need for additional monitors. To address these challenges, in this paper, we propose a physics-based digital twin assisted link status visualization (DT-LSV) framework for monitoring ROADM status, specifically focusing on filter shift (FS) and filter tightening (FT) failures. Our approach is only based on the receiver digital signal processing (DSP) and configuration parameters, eliminating the need for additional monitors. In the absence of labeled failure data, DT-LSV utilizes normal data, and as labeled failure data accumulates, it gradually learns to further enhance performance. By integrating a parameter learning module into the theoretical model, we construct a physics-based digital twin (DT) model. Using this model and real data from receiver DSP, we formulate and solve an optimization problem for accurate ROADM status visualization. Our framework is validated through extensive experiments, achieving a 100% accuracy in localizing ≥ 5 GHz FS (with a 0.66 dB signal-to-noise ratio (SNR) penalty) and ≥ 8.5 GHz FT anomalies (with a 1.31 dB SNR penalty). The root mean square error (RMSE) of failure magnitude estimation is 0.60 GHz for FS and 0.41 GHz for FT. Additionally, the high efficiency of the framework is demonstrated, the importance of the parameter learning module is underscored, and the effectiveness

关键词： Fiber to the x

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Direct detection with an optimal transfer function:toward the electrical spectral efficiency of coherent homodyne detection

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Opto-Electronic Science 2025年第2期4卷 1-15页

作者： Xingfeng Li Jingchi Li Xiong Ni Hudi Liu Qunbi Zhuge Haoshuo Chen William Shieh Yikai Su State Key Lab of Advanced Optical Communication Systems and Networks Department of Electronic EngineeringShanghai Jiao Tong UniversityShanghai 200240China Nokia Bell Labs 600 Mountain AveMurray HillNJ 07974USA School of Engineering Westlake UniversityHangzhou 310030China

Complex-valued double-sideband direct detection(DD)can reconstruct the optical field and achieve a high electrical spectral efficiency(ESE)comparable to that of a coherent homodyne receiver,and DD does not require a costly local oscillator ***,a fundamental question remains if there is an optimal DD receiver structure with the simplest design to approach the performance of the coherent homodyne *** study derives the optimal DD receiver structure with an optimal transfer function to recover a quadrature amplitude modulation(QAM)signal with a near-zero guard band at the central frequency of the *** derive the theoretical ESE limit for various detection schemes by invoking Shannon’s *** proposed scheme is closest to coherent homodyne detection in terms of the theoretical ESE *** leveraging a WaveShaper to construct the optimal transfer function,we conduct a proof-of-concept experiment to transmit a net 228.85-Gb/s 64-QAM signal over an 80-km single-mode fiber with a net ESE of 8.76 b/s/*** the best of our knowledge,this study reports the highest net ESE per polarization per wavelength for DD transmission beyond 40-km single-mode *** a comprehensive metric,denoted as 2ESE×Reach,we achieve the highest 2ESE×Reach per polarization per wavelength for DD transmission.

关键词： optical communication direct detection optical field recovery electrical spectral efficiency

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Sensing-communication-Computation Integration for Federated Edge Learning with Controllable Model Dropout

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IEEE Internet of Things Journal 2025年

作者： Jiao, Xiang Zhu, Guangxu Jiang, Wei Chen, Li Luo, Wu Wen, Dingzhu State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing China Shenzhen Research Institute of Big Data Shenzhen China The State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Peking University Beijing China The CAS Key Laboratory of Wireless Optical Communication University of Science and Technology of China Hefei China Network Intelligence Center School of Information Science and Technology ShanghaiTech University Shanghai China

FEderated Edge Learning (FEEL) is an advanced paradigm in edge artificial intelligence, enabling privacy-preserving collaborative model training through periodic communication between edge devices and a central server. FEEL involves three key processes: sensing, computation, and communication for data acquisition, processing, and exchange, respectively. Due to limited system resources, optimizing each process individually may lead to suboptimal learning performance. This challenge has sparked research into Integrated Sensing-Computation-communication (ISCC) design for enhanced FEEL. While previous work has optimized general learning parameters such as batch size and computing frequency, there is a lack of customized designs considering the neural network architecture as an optimizable variable in ISCC for FEEL. To close this gap, we introduce a novel design where each device generates a sub-model through controllable weight dropout, adding flexibility by directly manipulating the learning process and reducing computation and communication overhead. To guide ISCC resource allocation in this new setting, we present a comprehensive convergence analysis, revealing the tight coupling of sensing, computation, and communication across devices and their impact on FEEL convergence. Building on these theoretical insights, we formulate an ISCC problem aiming to maximize the FEEL convergence rate through joint optimization of variables such as batch size, sensing power, dropout rate, and communication power. This non-convex problem is decomposed into two sub-problems via alternating optimization: one controls batch size using a sorting algorithm, while the other focuses on ISCC device parameters, transformable into a convex problem solved by successive convex approximation. Extensive experiments using human motion recognition datasets demonstrate the superiority of the proposed design over baseline schemes. © 2014 IEEE.

关键词： Federated learning

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Edge-Driven Industrial Computing Power networks: Digital Twin-Empowered Service Provisioning by Hybrid Soft Actor-Critic

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IEEE Transactions on Vehicular Technology 2025年第5期74卷 8095-8109页

作者： Zhang, Long Song, Deng-Ao Zhang, Hongliang Tian, Ni Zhuang, Zirui Niyato, Dusit Han, Zhu Hebei University of Engineering School of Information and Electrical Engineering Handan056038 China Peking University State Key Laboratory of Advanced Optical Communication Systems and Networks School of Electronics Beijing100871 China Beijing University of Posts and Telecommunications State Key Laboratory of Networking and Switching Technology Beijing100876 China Nanyang Technological University College of Computing and Data Science 639798 Singapore University of Houston Department of Electrical and Computer Engineering HoustonTX77004 United States Kyung Hee University Department of Computer Science and Engineering Seoul446-701 Korea Republic of

With the proliferation of data-intensive industrial applications, the collaboration of computing powers among standalone edge servers is vital to provision such services for smart devices. In this paper, we propose an edge-driven industrial computing power network (CPN) by orchestrating the computing and network resources of edge servers through the centralized resource scheduling and decentralized task computing. However, efficient task offloading and collaborative processing is challenging, which requires higher degrees of network automation and intelligence. Therefore, we incorporate digital twins (DTs) into the edge-driven CPN architecture, where the DTs are created as the digital replicas to assist both the computation offloading and collaborative processing. A joint optimization problem of the computing power assignment, service association, task partition, and transmit power control is formulated for maximizing the system average weighted utility. Due to the temporal-spatial variability of tasks and the resulted dynamic environment, we transform the original problem as a Markov decision process aiming at maximizing the long-term average weighted utility. To efficiently handle the high-dimensional discrete-continuous action space, a hybrid soft actor-critic based deep reinforcement learning algorithm is developed for optimizing the joint design. Simulation results validate the superiority of our proposed algorithm over the benchmarks, showing the significant gains obtained by integrating DTs into the edge-driven CPN. © 1967-2012 IEEE.

关键词： Markov processes

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Security analysis of mode-pairing quantum key distribution with flexible pairing strategy

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Optics Express 2025年第11期33卷 23939-23959页

作者： Yi-Fei Lu Yang Wang Yan-Yang Zhou Yu Zhou Xiao-Lei Jiang Xin-Hang Li Hai-Tao Wang Jia-Ji Li Chun Zhou Hong-Wei Li Yu-Yao Guo Lin-Jie Zhou Wan-Su Bao Henan Key Laboratory of Quantum Information and Cryptography IEU Zhengzhou 450001 China wy@*** State Key Laboratory of Advanced Optical Communication Systems and Networks Shanghai Key Lab of Navigation and Location Services Department of Electronic Engineering Shanghai Jiao Tong University Shanghai 200240 China bws@***

Mode-pairing quantum key distribution (MP-QKD) is advantageous for long-distance secure communication, leveraging its simple implementation and quadratic scaling capacity. The post-measurement pairing in MP-QKD alleviates the photon-coincidence demands, which are essential for surpassing the fundamental limit to the key-rate transmission. In this work, we propose an improved decoy-state MP-QKD protocol featuring a flexible and efficient pairing strategy. We prove the security of the proposed scheme by presenting an entanglement model for decoy-state MP-QKD. The simulation results show that the secret key rate (SKR) can be enhanced among all distances. Notably, compared with the original scheme [Nature communication 13 , 3903 (2022) [ CrossRef ] ], the improvement of SKR is greater than 65% within 375 km in the asymptotic case and greater than 50% within 400 km in the finite case. And the achievable distance can be extended in the finite case, especially with a small block length. The simulation results demonstrate the high efficiency of the proposed scheme, which is expected to promote the practical applicability of MP-QKD. Furthermore, the entanglement model could provide a theoretical framework for further security and performance analysis of decoy-state MP-QKD.

关键词： Integrated photonics Phase compensation Phase estimation Quantum communications Quantum key distribution Variable optical attenuators

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Silicon thermo-optic switch based on photonic crystal nanobeam cavity with doped-silicon heaters

Silicon thermo-optic switch based on photonic crystal nanobe...

引用

IEEE International Conference on Group IV Photonics

作者： Hua Zhong Jingchi Li Yu He Meng Tian Yong Zhang Yikai Su Department of Electronic Engineering State Key Lab of Advanced Optical Communication Systems and Networks Shanghai Jiao Tong University Shanghai China

We demonstrate a silicon TO switch based on photonic crystal nanobeam cavity with doped-silicon heaters. The insertion loss and crosstalk are less than 2.01 dB and -9.78 dB, respectively. The thermo-optic tuning effic... 详细信息

ISBN: (数字)9798331506186

ISBN: (纸本)9798331506193

关键词： Heating systems optical losses Crosstalk Switches Photonic crystals Insertion loss Silicon photonics Foundries Tuning Standards

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Secure encryption system based on quantum access network 4

Secure encryption system based on quantum access network

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4th International Computational Imaging Conference, CITA 2024

作者： Liu, Yuchao Wang, Tao Xu, Yuehan Zeng, Guihua State Key Laboratory of Advanced Optical Communication Systems and Networks Center of Quantum Sensing and Information Processing Shanghai Jiao Tong University Shanghai200240 China Shanghai Research Center for Quantum Sciences Shanghai201315 China Hefei National Laboratory CAS Center for Excellence in Quantum Information and Quantum Physics Hefei230026 China

ISBN: (纸本)9781510688834

Quantum secure communication technology, grounded in the principles of quantum mechanics, has revolutionized traditional cryptographic methods, which predominantly rely on mathematical algorithms and logical transformations. Quantum key distribution (QKD) facilitates the secure sharing of symmetric keys between legitimate parties, ensuring the integrity and confidentiality of information in communication channels. Among various QKD schemes, continuous variable quantum key distribution (CV-QKD) has emerged as a viable alternative to the more established discrete variable quantum key distribution (DV-QKD). CV-QKD boasts several advantages, including straightforward deployment, reduced operational costs, and stable signal quality, positioning it as a significant component of the quantum communication *** noise stream cipher (QNSC) represents a technique that employs redundant data streams to encrypt plaintext. Notably, QNSC shares structural similarities with the optical path used in quantum key distribution, allowing for compatibility with existing QKD infrastructure. Furthermore, the keys generated through quantum key distribution ensure absolute security, enabling them to substitute the data streams produced by pseudo-random sequences traditionally used in classical encryption schemes. This substitution enhances the overall security framework of the quantum noise stream encryption *** quantum access network (QAN) extends quantum key distribution capabilities from point-to-point connections to point-to-multipoint configurations, thereby becoming an essential component of contemporary network architectures. By interlinking multiple end users with a network backbone, quantum access networks can seamlessly integrate with quantum key distribution protocols. This integration offers a cost-effective and scalable solution for user access to the *** experimental verifications have demonstrated the viability of downstream access networks,

关键词： Quantum noise

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Joint sensing and communication on fiber system with integrated waveform designing 4

Joint sensing and communication on fiber system with integra...

引用

4th International Computational Imaging Conference, CITA 2024

作者： Ma, Mingxuan Bi, Meihua Zhang, Lu Hu, Miao School of Communication Engineering Hangzhou Dianzi University Xiasha Gaojiaoyuan 2nd Street Zhe Jiang province Hangzhou310018 China State Key Laboratory of Advanced Optical Communication System and Networks Department of Electronic Engineering Shanghai Jiao Tong University 800 Dongchuan Rd Shanghai200240 China College of Information Science and Electronic Engineering Zhejiang University Zhe Jiang province Hangzhou310018 China

ISBN: (纸本)9781510688834

A novel communication-centric integrated sensing and communication waveform design method is proposed. The sensing mutual information is introduced as a metric to evaluate system sensing performance. By combining the established mathematical system model, the crosstalk between communication and sensing is theoretically minimized, while the mutual information carried by the sensing signal regarding the sensing target is theoretically maximized. The sensing signal spectrum distribution is designed based on the optimization results, ultimately forming the water-filling-based integrated waveform design method. This approach maximizes overall system performance, enabling a high-performance integrated sensing and communication system. Using the proposed waveform design method, the frequency-division ISAC-OF system simultaneously achieves 25-Gbit/s data transmission and meter-level localization of fiber fault points over a 20-km single-mode fiber link. Simulation experiments verify that the proposed integrated waveform design method achieves the combination of high-speed optical fiber communication with high-precision optical fiber sensing. © 2025 SPIE.

关键词： Single mode fibers

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Analysis of Spiral Scanning Amplitude Modulation Methods for Two-photon Endomicroscopy 10

Analysis of Spiral Scanning Amplitude Modulation Methods for...

引用

10th Symposium on Novel Optoelectronic Detection Technology and Applications

作者： Cui, Haodong Wang, Conghao Liu, Huilan Zhang, Xiulei Hu, Yanhui Fu, Qiang Wu, Runlong Wang, Aimin Feng, Lishuang School of Instrumentation and Optoelectronic Engineering Beihang University Beijing100191 China Beijing100191 China School of Automation Science and Electrical Engineering Beihang University Beijing100191 China Beijing Transcend Vivoscope Biotech Co. Ltd. Beijing100049 China Beijing Key Laboratory for Optoelectronics Measurement Technology Beijing Information Science and Technology University Beijing100192 China State Key Laboratory of Advanced Optical Communication System and Networks Department of Electronics Peking University Beijing100871 China

ISBN: (数字)9781510688155

ISBN: (纸本)9781510688148

Two-photon endomicroscopy is a high-resolution label-free imaging technique for biological tissues. This paper analyzes sinusoidal and triangular amplitude modulation methods for spiral scanning two-photon endomicroscopy. In the theoretical modeling section, the mathematical model of PZT fiber scanner is established, and the distortion of fiber scanning trajectory caused by two amplitude modulated sine wave signals is simulated and evaluated. In the experimental verification section, a test platform is constructed to measure the scanning trajectory distortion driven by these amplitude modulated sine wave signals. Finaly, spiral scanning two-photon endomicroscopic imaging of in-vivo GFP mice brain tissues using sinusoidal amplitude modulated signals are demonstrated. © 2025 SPIE.

关键词： Amplitude modulation

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