{"title":"Optimization of time and frequency allocations in a TFDMA PON with diverse user conditions and diversified rate targets.","authors":"Jie Luan, Xi Chen, Di Che","doi":"10.1364/OL.558972","DOIUrl":null,"url":null,"abstract":"<p><p>Active research is being conducted for beyond-100G passive optical networks (PONs) to cover contemporary society's ever-increasing information rate demand. In this context, time-frequency-division multiple access (TFDMA) PON can potentially extend the coverage of the current time-division multiple access (TDMA) scheme in a diversified user network. In this Letter, we study the time and frequency allocations in a TFDMA PON based on digital subcarrier multiplexing (DSCM), where the users' channels exhibit frequency-dependent performance and disparity. We also consider the possibility that the users target different information rates. We provide a formal proof that the TFDMA approach yields a diversity gain over the traditional TDMA scheme and verify the effectiveness of our allocation method by calculating the diversity gain for a 200G-class intensity-modulation direct-detection (IM-DD) system.</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 12","pages":"3911-3914"},"PeriodicalIF":3.1000,"publicationDate":"2025-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Optics letters","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1364/OL.558972","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"OPTICS","Score":null,"Total":0}
引用次数: 0
Abstract
Active research is being conducted for beyond-100G passive optical networks (PONs) to cover contemporary society's ever-increasing information rate demand. In this context, time-frequency-division multiple access (TFDMA) PON can potentially extend the coverage of the current time-division multiple access (TDMA) scheme in a diversified user network. In this Letter, we study the time and frequency allocations in a TFDMA PON based on digital subcarrier multiplexing (DSCM), where the users' channels exhibit frequency-dependent performance and disparity. We also consider the possibility that the users target different information rates. We provide a formal proof that the TFDMA approach yields a diversity gain over the traditional TDMA scheme and verify the effectiveness of our allocation method by calculating the diversity gain for a 200G-class intensity-modulation direct-detection (IM-DD) system.
期刊介绍：
The Optical Society (OSA) publishes high-quality, peer-reviewed articles in its portfolio of journals, which serve the full breadth of the optics and photonics community.
Optics Letters offers rapid dissemination of new results in all areas of optics with short, original, peer-reviewed communications. Optics Letters covers the latest research in optical science, including optical measurements, optical components and devices, atmospheric optics, biomedical optics, Fourier optics, integrated optics, optical processing, optoelectronics, lasers, nonlinear optics, optical storage and holography, optical coherence, polarization, quantum electronics, ultrafast optical phenomena, photonic crystals, and fiber optics. Criteria used in determining acceptability of contributions include newsworthiness to a substantial part of the optics community and the effect of rapid publication on the research of others. This journal, published twice each month, is where readers look for the latest discoveries in optics.
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