Journal of Optical Communications and Networking最新文献

{"title":"On the design of efficient fiber-wireless architectures to enable multigigabit visible light communication","authors":"Pedro A. Loureiro;Bruno T. Brandao;Salma Yahyaoui;Fernando P. Guiomar;Paulo P. Monteiro","doi":"10.1364/JOCN.543005","DOIUrl":"https://doi.org/10.1364/JOCN.543005","url":null,"abstract":"The surge in demand for wireless communication has placed significant strain on existing radio networks, which are struggling to accommodate the rapidly increasing number of mobile and fixed wireless devices. In response to this challenge, industry and academia have collaborated to explore alternative radio access technologies capable of supporting this continuous growth. Visible light communication (VLC) has emerged as a promising alternative due to the hundreds of terahertz of unlicensed bandwidth available for wireless communication. Despite its undisputable potential for ultrahigh-speed communication, the interface between the VLC wireless access and the fiber distribution network is still largely unexplored. Notably, this issue becomes more challenging when dealing with multicolored VLC systems, such as those employing RGB multiplexing. Following this research gap, in this work, we focus our attention on the design of efficient optical/electrical interfaces that can synergistically merge the fiber and VLC sections of an integrated fiber-wireless network. To that end, two fundamental architectural options are proposed and experimentally assessed, resorting to either optical or electrical multiplexing of the VLC constituent colors. From our experimental analysis, similar RGB-VLC data rates of 13–15 Gbit/s could be achieved using both fiber-wireless interface architectures. The choice of the most adequate solution is then fundamentally dependent on a number of network design options and requirements. While electrical multiplexing is deemed to enable more spectrally efficient utilization of the fiber transport network, optical multiplexing provides a simpler infrared-to-visible interface using cost-efficient commercial off-the-shelf equipment.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":"17 3","pages":"188-197"},"PeriodicalIF":4.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enabling ROADM in mode division multiplexing networks with mode-selective switches","authors":"Sunami Sajjanam Morrison;S. Mohammad Reza Safaee;Zhaoqi Ma;Rebecca Rogers;Dusan Gostimirovic;Kaveh Rahbardar Mojaver;Odile Liboiron-Ladouceur","doi":"10.1364/JOCN.538478","DOIUrl":"https://doi.org/10.1364/JOCN.538478","url":null,"abstract":"Mode division multiplexing (MDM) enhances optical communication systems by introducing an additional multiplexing dimension. We designed and validated a reconfigurable optical add/drop multiplexer (ROADM) prototype using MDM as an optical subsystem targeting data center interconnects and metro optical networks. Our MDM-ROADM employs a mode-selective switch at each node, selectively de/multiplexing the first three transverse-electric (TE) modes. Key components are based on 220 nm silicon photonics, using subwavelength grating structures and inverse design methodology. Machine learning-based fabrication correction, via our tool PreFab, improved mode selectivity by 57% for mode-selective thermo-optic phase shifters. We also developed mode filters for two modes with a crosstalk of <tex>${-}{9};{text{dB}}$</tex> for <tex>${{text{TE}}_0}$</tex> and <tex>${-}{15};{text{dB}}$</tex> for <tex>${{text{TE}}_1}$</tex> within a 35 nm wavelength range. Experimental validation using <tex>${{text{TE}}_0}$</tex> and <tex>${{text{TE}}_1}$</tex> modes at 1555 nm shows an aggregate payload transmission of 80 Gb/s NRZ and a PAM-4 transmission at 40 Gbaud with a bit error rate of <tex>$1.1 times {10^{- 9}}$</tex> and <tex>$3.8 times {10^{- 3}}$</tex>, respectively.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":"17 3","pages":"A234-A246"},"PeriodicalIF":4.0,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143446208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Access point selection based on beacon signals in optical satellite networks","authors":"Yuanjian Zhang;Yongli Zhao;Dedong Zhang;Xiaodan Yan;Wei Wang;Yinji Jing;Nan Hua;Jie Zhang","doi":"10.1364/JOCN.537597","DOIUrl":"https://doi.org/10.1364/JOCN.537597","url":null,"abstract":"Megasatellite constellations (MSCs) represent the forefront of satellite network development, encompassing a vast network of interconnected low-Earth orbit (LEO) satellites. The satellites in MSCs will be interconnected with laser links, capitalizing on the laser’s impressive bandwidth and robust security features. This interconnectivity enables the provision of high-bandwidth and low-latency Internet services on a global scale. However, LEO satellite networks exhibit high dynamics, especially between satellite nodes and ground nodes. This poses challenges to the high-bandwidth communication capabilities and quality of service in satellite networks. In such cases, the selection of different satellite access points will significantly affect the performance of the communication. This paper proposes an access point selection algorithm that chooses access satellites based on information from the satellite’s beacon signals, achieving lower service latency and handover times. The algorithm innovatively leverages the regularity of the inter-satellite topology in large-scale satellite networks to evaluate access points, resulting in the selection of preferred access points. Simulation results show that the algorithm achieves access satellite service performance that reduces service latency by 13% and handover frequencies by 40% compared to random access satellite selection.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":"17 3","pages":"163-177"},"PeriodicalIF":4.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modeling the physical layer of air-to-space optical communication networks using the modified multi-scale method","authors":"Wieger Helsdingen;Remco den Breeje;Rudolf Saathof","doi":"10.1364/JOCN.551182","DOIUrl":"https://doi.org/10.1364/JOCN.551182","url":null,"abstract":"To support the development of free-space-optical (FSO) communication technologies, an end-to-end physical layer model of a satellite communication service was developed. This service involves physical processes spanning multiple time scales: hours (relative platform dynamics), minutes (link selection, atmospheric attenuation), milliseconds (atmospheric turbulence, platform disturbances), and nanoseconds (photon and bit transportation). The modified multi-scale method (MMM) was used to combine the physics of these processes and to model an end-to-end global FSO communication service between an airborne platform and a satellite constellation. The method provides a better understanding of physical interdependencies, allows performance analysis on multiple time scales, and enables valuable insight into where to optimize such a service. The results show realistic performance metrics when compared to other smaller-scale models and demonstrations. The MMM can be used as a mission performance indicator of an end-to-end satellite communication service.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":"17 3","pages":"178-187"},"PeriodicalIF":4.0,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143403917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A broadcast-and-select ROADM architecture to support linear hub-ended trees using point-to-multipoint coherent transceivers [Invited]","authors":"Nina Skorin-Kapov;Pablo Pavon-Marino;Marco Quagliotti;Emilio Riccardi;Antonio Napoli;Joao Pedro;Oscar Gonzalez de Dios","doi":"10.1364/JOCN.550101","DOIUrl":"https://doi.org/10.1364/JOCN.550101","url":null,"abstract":"Point-to-multipoint (P2MP) coherent pluggable transceivers based on digital subcarrier multiplexing (DSCM) have been proposed as a promising technology to reduce the costs of optical transport networks. However, to establish the P2MP trees, bidirectional multicast functionality is required at the optical nodes. While conventional broadcast-and-select (B&S) wavelength selective switch (WSS)-based reconfigurable optical add/drop multiplexer (ROADM) architectures can inherently perform splitting operations, merge operations of DSCM signals face internal blocking in conventional WSSs since they require switching signals from different input ports on the same carrier wavelength (although using different subcarriers) to the common output port. In this paper, we propose an alternative ROADM architecture requiring a simple low-cost modification, which can support P2MP trees, provided that they are routed as linear chains with the hub node at one end, without requiring multicast-enabled WSSs. We evaluate the potential savings of linear hub-ended P2MP trees on a metro reference scenario using a modified tree-determination, routing, and spectrum assignment (TRSA) dimensioning algorithm. Results indicate that linear hub-ended trees can significantly reduce transceiver costs with respect to point-to-point (P2P) solutions in all considered cases, with savings ranging from 6%–28% depending on the traffic load. While these savings are somewhat less than those achievable with arbitrary P2MP trees and latency is slightly higher, spectrum waste is reduced by employing linear routing, and the trees can be supported by the proposed architecture.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":"17 7","pages":"C1-C10"},"PeriodicalIF":4.0,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143361195","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparison of distributed and centralized quantum key management systems for meshed QKD networks","authors":"Mario Wenning;Jonas Berl;Tobias Fehenberger;Carmen Mas-Machuca","doi":"10.1364/JOCN.542054","DOIUrl":"https://doi.org/10.1364/JOCN.542054","url":null,"abstract":"Recent developments in quantum key distribution (QKD) demonstrate the maturity of securing sensitive data against the emerging quantum computing threat. For QKD-secured long-haul and meshed optical transport networks (OTNs), quantum key management systems (QKMSs) are essential to overcome current distance limitations of available QKD devices. In this work, we present and compare two implementations of QKMSs, analyzing their scalability with an emulated QKD network (QKDN) utilizing recorded performance metrics from deployed QKD devices. First, we use a state-of-the-art Internet routing scheme, i.e., open shortest path first (OSPF), demonstrating that key management entities (KMEs) can solve the key routing problem utilizing distributed routing. Second, we apply software-defined networking (SDN) to implement centralized routing with a SDN controller. This paper compares distributed with centralized key routing regarding scalability, throughput, and latency. Both schemes facilitate up to six key relays between any pair of nodes in parallel with average key relay durations per hop below 300 ms given the Nobel-Germany topology and any-to-any demand matrix. With a network-wide joint key routing optimization in the SDN controller, up to 16.7% higher demands can be served compared to distributed key routing. Within the inherent compatibility of our study to network-function virtualization (NFV), we guideline future integration of QKMSs into deployed OTNs.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":"17 2","pages":"A224-A233"},"PeriodicalIF":4.0,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Introduction to the OFC 2024 Special Issue","authors":"Andrew Lord","doi":"10.1364/JOCN.557965","DOIUrl":"https://doi.org/10.1364/JOCN.557965","url":null,"abstract":"Welcome to this year’s OFC conference special issue. I am thrilled to introduce a bumper crop of papers that were originally either invited or top-scoring papers at OFC 2024. I can’t refer to all of them in this introduction, but I will point out the highlights and major trends.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":"17 2","pages":"OFC1-OFC1"},"PeriodicalIF":4.0,"publicationDate":"2025-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10862986","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Extended network applications of coherent pluggable transceivers [Invited]","authors":"Joao Pedro;Mohammad M. Hosseini;Antonio Napoli","doi":"10.1364/JOCN.537601","DOIUrl":"https://doi.org/10.1364/JOCN.537601","url":null,"abstract":"Over the past 15 years, coherent optical transceiver evolution has been driving the increase of capacity in optical networks, enabling the cost-effective transport of higher traffic volumes across submarine, long-haul, regional, and (a fraction of) metro networks. Until recently, these devices have been proprietary and embedded in dedicated line cards, which are deployed and managed within the transport network domain. With the emergence of both implementation and multi-source agreements for coherent optical transceivers in pluggable form factors, significant savings in cost, power consumption, and footprint are now achievable, e.g., in high-speed data center interconnect (DCI) and metro applications. Furthermore, by installing these transceivers directly in routers/switches, the long-envisioned IP over-DWDM architecture can be materialized. Importantly, recent progress in coherent pluggable transceivers’ performance and feature sets is expanding the number of network segments where their benefits can be leveraged. This paper overviews the range of applications of coherent pluggable optical transceivers and investigates in detail how they can (i) meet the stringent requirements of regional/long-haul networks and (ii) further simplify and reduce the capital expenditures of metro-aggregation networks. Particularly, it reports a comparison of the deployment in a reference regional network of coherent pluggable transceivers that retain full interoperability (at the expense of limited performance) and coherent pluggable transceivers designed for best-in-class performance. The network simulation analysis focuses on the key design metrics in this network segment—usable capacity and number of required transceivers—and highlights the importance of adopting high-performance devices. Moreover, it describes how a low-cost filterless architecture can be combined with coherent pluggable transceivers featuring point-to-multipoint (P2MP) capabilities via digital subcarrier multiplexing (DSCM) to reduce capital expenditures in metro-aggregation networks. It is shown that, by exploiting a transmitter-based launch power control, the number of optical amplifiers can be minimized while guaranteeing that the power unbalance associated with the different paths traversed by upstream subcarriers (SCs) can be kept below a target threshold.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":"17 2","pages":"A210-A223"},"PeriodicalIF":4.0,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107168","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimizing telemetry forwarding for distributed failure recovery in packet-optical networks","authors":"Piotr Lechowicz;Carlos Natalino;Filippo Cugini;Francesco Paolucci;Paolo Monti","doi":"10.1364/JOCN.534559","DOIUrl":"https://doi.org/10.1364/JOCN.534559","url":null,"abstract":"Fast network recoverability from hard and soft failures is crucial for network operators to deliver uninterrupted services. Streaming telemetry has been studied as a solution for enabling fast and accurate failure detection in optical networks. However, significant delay is incurred when relying on a centralized entity (e.g., software-defined network controller) to collect, process, and act on telemetry data. Programmable switches (e.g., P4-based) allow telemetry data to be processed at line speed, enabling local on-device (distributed) decisions. These devices can be used to deploy quick and local mitigation to failures while a global solution is being computed on a longer time scale. However, designing network-wide streaming telemetry with distributed decisions remains an open challenge. In this work, we specify the joint optimization of packet-optical networks with on-device failure recovery, considering multiple aspects of the problem. The problem is modeled using linear programming and solved for multiple network realizations. The solutions can be used to program each switch in the network to detect failures and quickly recover the traffic. Results show that the proposed model decreases the required number of register entries to store telemetry data while assuring high recoverability and a minimized number of wavelengths.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":"17 2","pages":"152-162"},"PeriodicalIF":4.0,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107166","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Unified monitoring and telemetry platform supporting network intelligence in optical networks","authors":"Sen Shen;Jing Han;Klodian Bardhi;Haiyuan Li;Ruizhi Yang;Yiran Teng;Vaigai Yokar;Shuangyi Yan;Dimitra Simeonidou","doi":"10.1364/JOCN.538552","DOIUrl":"https://doi.org/10.1364/JOCN.538552","url":null,"abstract":"In recent years, machine-learning (ML) applications have generated considerable interest and shown great potential in optimizing optical network management, such as quality of transmission estimation, traffic prediction, and resource allocation. However, these applications often require large datasets for training, inference, and updating, while network operators are generally reluctant to disclose their data due to privacy concerns and the sensitivity of operational information. Most open-source datasets typically lack transparency regarding network specifics, such as topology details and device configurations, making data acquisition and ML model training more difficult. In response, this paper presents a unified monitoring and telemetry platform that leverages distributed and centralized time-series databases on InfluxDB, a Kafka-based telemetry pipeline, and advanced ML applications. The separation of distributed and centralized databases improves data management flexibility and scalability. The Kafka-based telemetry pipeline ensures high-throughput, low-latency data streaming with end-to-end latency under 0.05 s through optimized partitioning. Additionally, integrating Kafka and InfluxDB allows for real-time data visualization from multiple sources, improving transparency and supporting real-time data streaming for network applications. By implementing this advanced telemetry and ML architecture, network operators can build a more intelligent, responsive, and resilient optical network infrastructure.","PeriodicalId":50103,"journal":{"name":"Journal of Optical Communications and Networking","volume":"17 2","pages":"139-151"},"PeriodicalIF":4.0,"publicationDate":"2025-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143107170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}