Journal of Lightwave Technology最新文献

Guest Editorial: Introduction to the OFC 2024 Special Issue

IF 4.1 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-02-17 DOI: 10.1109/JLT.2025.3533160

Chris Fludger;Roland Ryf;Dimitra Simeonidou;Jiajia Chen;Johannes Karl Fischer;Tetsuya Hayashi

引用次数: 0

2024 Index Journal of Lightwave Technology Vol. 42

IF 4.1 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-02-06 DOI: 10.1109/JLT.2025.3539127

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Optical Communications in Autonomous Driving Vehicles: Requirements, Challenges, and Opportunities

IF 4.1 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-01-27 DOI: 10.1109/JLT.2025.3533911

Qin Liang;Xinghao Lai;Zhihao Li;Weijie Sheng;Lin Sun;Yi Cai;Gangxiang Shen;Gordon Ning Liu

{"title":"Optical Communications in Autonomous Driving Vehicles: Requirements, Challenges, and Opportunities","authors":"Qin Liang;Xinghao Lai;Zhihao Li;Weijie Sheng;Lin Sun;Yi Cai;Gangxiang Shen;Gordon Ning Liu","doi":"10.1109/JLT.2025.3533911","DOIUrl":"https://doi.org/10.1109/JLT.2025.3533911","url":null,"abstract":"The automotive industry is currently undergoing a revolution. Electrification, automation, and connectivity become major trends in future vehicles. Autonomous driving vehicles require a variety of sensors to perceive their surroundings and rely on high-speed and reliable intra-vehicle networks (IVNs) for data transmission. As the number and performance of sensors increase and the IVN evolves from distributed architecture to domain centralized and zone centralized architecture, the demand for IVN data rates escalates. Optical fiber communication is a promising solution in IVN due to its high bandwidth, light weight, and good electromagnetic compatibility. However, the harsh environment in vehicles such as wide temperature range, vibration, dust and grease contamination poses a great challenge to employ optical fiber communication in IVN. To tackle this issue, novel intra-vehicle optical network configurations and technologies have been proposed. In addition, the development of vehicle-to-everything (V2X) communication technology will further improve road safety and traffic efficiency. Optical wireless communication can offer advantages over radio frequency technology for V2X communication.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 4","pages":"1690-1699"},"PeriodicalIF":4.1,"publicationDate":"2025-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reaching the Peta-Computing: 163.8 TOPS Through Multidimensional AWGR-Based Accelerators

IF 4.1 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-01-21 DOI: 10.1109/JLT.2025.3532315

Christos Pappas;Theodoros Moschos;Antonios Prapas;Manos Kirtas;Miltiadis Moralis-Pegios;Apostolos Tsakyridis;Odysseas Asimopoulos;Nikolaos Passalis;Anastasios Tefas;Nikos Pleros

{"title":"Reaching the Peta-Computing: 163.8 TOPS Through Multidimensional AWGR-Based Accelerators","authors":"Christos Pappas;Theodoros Moschos;Antonios Prapas;Manos Kirtas;Miltiadis Moralis-Pegios;Apostolos Tsakyridis;Odysseas Asimopoulos;Nikolaos Passalis;Anastasios Tefas;Nikos Pleros","doi":"10.1109/JLT.2025.3532315","DOIUrl":"https://doi.org/10.1109/JLT.2025.3532315","url":null,"abstract":"The prowess of Artificial Intelligence (AI) and Large Language Models (LLMs) to compute the exponentially growing data, coupled with the digital electronic AI computing systems reaching their physical plateaus, have stimulated extensive research into next-gen AI accelerators. Optical Neural Networks (ONNs) have been among the most favored candidates, since the unparalleled speed of light can provide massive compute parallelism by the physical dimensions of time, wavelength, and space, offering higher computational speeds and lower power consumption. In this paper, we experimentally demonstrate novel time-space-wavelength multiplexed arrayed waveguided gratings router (AWGR)-based architectures exploited as photonic matrix- and tensor-multiplier engines achieving a total computational power of up to 163.8 TOPS. This marks a substantial ∼15x improvement over state-of-the-art waveguide-based optical accelerators. The two demonstrators were tested for three different NN applications, under two experimental testbeds. The matrix-multiplier was evaluated as a fully connected NN (FCNN), classifying images from the FMNIST dataset. An 8 × 8 AWGR was employed for providing the passive routing, with modulators driven at 10Gbaud, exhibiting a hardware-based inference accuracy of 87.1% with respect to the software. The tensor-multiplier, using a 16 × 16 AWGR, was evaluated as a FCNN and a convolutional NN (CNN), detecting DDoS attacks and classifying handwritten digits at 20 Gbaud. The experimental results exhibited a Cohen's kappa score of 0.799 for the DDoS detection and a classification accuracy of 93.35%, respectively.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 4","pages":"1773-1785"},"PeriodicalIF":4.1,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438525","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optical and THz Integrated Circuits for Mode-Dependent Free-Space Communications

IF 4.1 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-01-15 DOI: 10.1109/JLT.2025.3530275

Alan E. Willner;Huibin Zhou;Hongkun Lian;Yue Zuo;Zixun Zhao;Xinzhou Su;Hao Song

引用次数: 0

New Prospects of Optical Wireless Communication Systems Exploiting VCSEL-Based Transmitters

IF 4.1 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-01-15 DOI: 10.1109/JLT.2025.3530819

L. Gilli;G. Cossu;E. Ciaramella

{"title":"New Prospects of Optical Wireless Communication Systems Exploiting VCSEL-Based Transmitters","authors":"L. Gilli;G. Cossu;E. Ciaramella","doi":"10.1109/JLT.2025.3530819","DOIUrl":"https://doi.org/10.1109/JLT.2025.3530819","url":null,"abstract":"In the last decades, Vertical Cavity Surface Emitting Lasers (VCSELs) emerged as a dominant technology for short-reach high-data rate networks thanks to several advantageous features. These include low power consumption, high modulation speeds, low costs, and compact size. More recently, these inherent characteristics of the VCSELs have also made them exceptionally suited for a variety of Optical Wireless Communication (OWC) applications, particularly for short-distance links, up to a few meters. This paper reviews a range of new and promising applications for VCSELs within emerging OWC domains: Data Centers (DCs), space, and harsh environment. We present and discuss different VCSEL-based OWC systems that were designed, implemented, and tested in these emerging scenarios. For the DCs scenario, we present a novel approach to establish OWC links able to reach data rates up to <inline-formula><tex-math>$text{40} ,{text{Gbit}}/{text{s}}$</tex-math></inline-formula> with a single VCSEL. In the space environment, innovative OWC systems can support data communication among electronic elements placed in line-of-sight outside the spacecraft or inside a small satellite. VCSELs can be also exploited for data transmission in the very harsh environment of high-energy physics experiments. Here, a <inline-formula><tex-math>$text{10} ,{text{Gbit}}/{text{s}}$</tex-math></inline-formula> OWC system was designed for the Board-to-Board (B2B) link in High Energy Physics (HEP) experiments. Since space and HEP applications exhibit extreme conditions, the OWC systems and, particularly, the VCSELs were tested to assess their behavior under strong mechanical, thermal, and radiation stress.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 4","pages":"1615-1624"},"PeriodicalIF":4.1,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10843293","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Probabilistic Shaping Distributions for Optical Communications

IF 4.1 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-01-14 DOI: 10.1109/JLT.2025.3528835

Ethan M. Liang;Joseph M. Kahn

{"title":"Probabilistic Shaping Distributions for Optical Communications","authors":"Ethan M. Liang;Joseph M. Kahn","doi":"10.1109/JLT.2025.3528835","DOIUrl":"https://doi.org/10.1109/JLT.2025.3528835","url":null,"abstract":"Probabilistic shaping is widely employed in local oscillator-based coherent optical systems to improve receiver sensitivity and provide rate adaptation. This widespread adoption has been enabled, in part, by simple closed-form solutions for the optimal input distribution and channel capacity for these standard coherent channels. By contrast, the optimal input distributions and channel capacities for many direct-detection optical channels remain open problems. The lack of non-negative root-Nyquist pulses, signal-dependent noise, and the possible discreteness of the capacity-achieving input distribution have historically prevented standard information-theoretic techniques from obtaining simple closed-form solutions for these channels. In this tutorial, we review a high-rate continuous approximation (HCA) for analytically approximating the optimal input distribution. HCA, which was first developed for source coding, approximates the input constellation by a dense high-dimensional coset code that can be approximated well by a continuum, transforming the problem of computing the optimal input distribution subject to an average-power constraint to a problem of finding a minimum-energy shaping region in a high-dimensional continuous space. HCA yields closed-form continuous approximations to the capacity-achieving input distributions and shaping gains at high signal-to-noise ratio. We explain how enumerating a coset code in natural coordinates enables extension of HCA to direct-detection optical channels, allowing one to obtain closed-form approximations for the capacity-achieving input distributions and shaping gains for a variety of direct-detection systems that detect the intensity or Stokes vector and are limited by thermal or optical amplifier noise. We also discuss the implementation of probabilistic shaping in direct-detection systems.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 4","pages":"1501-1524"},"PeriodicalIF":4.1,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143430464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Silica-Core Single-Mode Fiber With Lowest Loss of 0.1397 dB/km

IF 4.1 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-01-10 DOI: 10.1109/JLT.2025.3527933

Shin Sato;Yuki Kawaguchi;Hirotaka Sakuma;Tetsuya Haruna;Takemi Hasegawa

引用次数: 0

Distributed Strain Sensing Based on Sensing Range Enhanced Optical Frequency Domain Reflectometry by Modified Longest Common Substring Algorithm

IF 4.1 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-01-08 DOI: 10.1109/JLT.2025.3526937

Xiang Zheng;Weilin Xie;Qiang Yang;Jiang Yang;Congfan Wang;Xin Li;Kaiyue Tan;Wei Wei;Yi Dong

{"title":"Distributed Strain Sensing Based on Sensing Range Enhanced Optical Frequency Domain Reflectometry by Modified Longest Common Substring Algorithm","authors":"Xiang Zheng;Weilin Xie;Qiang Yang;Jiang Yang;Congfan Wang;Xin Li;Kaiyue Tan;Wei Wei;Yi Dong","doi":"10.1109/JLT.2025.3526937","DOIUrl":"https://doi.org/10.1109/JLT.2025.3526937","url":null,"abstract":"Conventional cross-correlation is commonly used in the estimation of the spectral shift for optical frequency-domain reflectometry (OFDR) based distributed sensing. However, the potential errors in cases of relatively large shifts have severely limited the sensing dynamic range. We report a modified longest common substring algorithm that exploits two-dimensional image processing for more accurate shift estimation. Theoretical study for the conventional cross-correlation is conducted, which reveals quantitatively the underlying mechanism for the emergence of the correlation errors. By adopting the relative error function as the similarity function in connection with the binarization and normalized projection, it allows for a reduction for the possibility of large estimation error in a two-dimensional image processing manner, leading to a substantial improvement in the sensing range. Experimental demonstrations have verified a remarkable enhancement of about 18.7 times in strain sensing range, which accounts for ∼56.2% of the effective sweep range. The proposed algorithm not only permits opportunities in OFDR based distributed sensing, but also promises enhanced fidelity for applications where cross-correlation is concerned.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 4","pages":"1952-1961"},"PeriodicalIF":4.1,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438436","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High-Performance SiGe Analog Multiplexer Enabling 176 GBd PAM-8 Transmission

IF 4.1 1区工程技术

Journal of Lightwave Technology Pub Date : 2025-01-08 DOI: 10.1109/JLT.2025.3527328

Qian Hu;Markus Grözing;Tobias Tannert;Robert Borkowski;Fred Buchali;Pat Iannone;Gregory Raybon;Xi Chen;Georg Rademacher;Roland Ryf

{"title":"High-Performance SiGe Analog Multiplexer Enabling 176 GBd PAM-8 Transmission","authors":"Qian Hu;Markus Grözing;Tobias Tannert;Robert Borkowski;Fred Buchali;Pat Iannone;Gregory Raybon;Xi Chen;Georg Rademacher;Roland Ryf","doi":"10.1109/JLT.2025.3527328","DOIUrl":"https://doi.org/10.1109/JLT.2025.3527328","url":null,"abstract":"Analog multiplexer (AMUX) integrated circuits (ICs) expand the analog electrical bandwidth of transmitter frontends, enabling signal generation at ultrahigh symbol rates. In this work, we employ a SiGe AMUX which adopts a circuit topology optimized for signal linearity, supporting high-order modulation formats, such as multilevel pulse amplitude modulation (PAM). We discuss in detail the circuit design of the AMUX, including its AMUX core, clock path and output amplifier. We compare two circuit topologies with respect to power consumption, circuit complexity, clock strength and input-to-output linearity. We also perform theoretical analysis of signal impairments induced by misalignments between AMUX inputs to understand their impact on the integrity of the interleaved signal. Using this high-performance SiGe AMUX to drive an optical intensity modulator, we experimentally demonstrate generation and 2 km fiber transmission of different orders of PAM, up to PAM-8 at 176 GBd yielding a net bitrate of 467 Gbit/s.","PeriodicalId":16144,"journal":{"name":"Journal of Lightwave Technology","volume":"43 4","pages":"1881-1892"},"PeriodicalIF":4.1,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10834309","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0