{"title":"1.536-Tb/s CPRI-equivalent rate IFoF mobile fronthaul over a 10 km SSMF with time skew-enabled VSB.","authors":"Xiansong Fang, Yixiao Zhu, Xiang Cai, Jiayu Zheng, Weisheng Hu, Fan Zhang","doi":"10.1364/OL.546719","DOIUrl":null,"url":null,"abstract":"<p><p>Fronthaul plays a crucial role in bridging mobile and optical communications. Conventional digital radio-over-fiber (RoF) systems, utilizing the common public radio interface (CPRI), require a capacity exceeding an order of magnitude above the user data rate, posing challenges for dense small cell deployments and the growing bandwidth demands of 6 G and beyond. Intermediate-frequency-over-fiber (IFoF) with intensity modulation and direct detection (IM/DD) presents a promising alternative due to its high spectral efficiency and simpler architecture. However, traditional IM/DD systems are susceptible to fiber chromatic dispersion, limiting their application in fronthaul. In this Letter, we utilize a time skew-enabled vestigial sideband (VSB) technique to overcome power fading caused by chromatic dispersion in direct detection-based IFoF mobile fronthaul. We experimentally demonstrate hardware-efficient and high-capacity transmission of 1.536-Tb/s CPRI-equivalent rate with 128-QAM signal over a 10-km standard single-mode fiber (SSMF).</p>","PeriodicalId":19540,"journal":{"name":"Optics letters","volume":"50 6","pages":"1849-1852"},"PeriodicalIF":3.1000,"publicationDate":"2025-03-15","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.546719","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
Fronthaul plays a crucial role in bridging mobile and optical communications. Conventional digital radio-over-fiber (RoF) systems, utilizing the common public radio interface (CPRI), require a capacity exceeding an order of magnitude above the user data rate, posing challenges for dense small cell deployments and the growing bandwidth demands of 6 G and beyond. Intermediate-frequency-over-fiber (IFoF) with intensity modulation and direct detection (IM/DD) presents a promising alternative due to its high spectral efficiency and simpler architecture. However, traditional IM/DD systems are susceptible to fiber chromatic dispersion, limiting their application in fronthaul. In this Letter, we utilize a time skew-enabled vestigial sideband (VSB) technique to overcome power fading caused by chromatic dispersion in direct detection-based IFoF mobile fronthaul. We experimentally demonstrate hardware-efficient and high-capacity transmission of 1.536-Tb/s CPRI-equivalent rate with 128-QAM signal over a 10-km standard single-mode fiber (SSMF).
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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