4.7 Article

Challenges in Estimating the Information Capacity of the Fiber-Optic Channel

期刊

PROCEEDINGS OF THE IEEE
卷 110, 期 11, 页码 1655-1678

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPROC.2022.3197188

关键词

Optical transmitters; Optical receivers; Optical propagation; Optical distortion; Optical fibers; Fiber nonlinear optics; Bandwidth; Information capacity; optical communications; space-division multiplexing (SDM)

资金

  1. Israel Science Foundation [1090/20]
  2. Italian Government through project INnovating City Planning through Information and Communication Technologies (INCIPICT) [135]
  3. Italian Government through PRIN 2017 project Fiber Infrastructure for Research on Space-division multiplexed Transmission (FIRST)

向作者/读者索取更多资源

This article reviews the challenges faced by optical fiber transmission, discusses the impact of the nonlinear nature of fiber-optic transmission on capacity assessment and fundamental concepts, and introduces some solutions and new transmission schemes. State-of-the-art transmission experiments are also reviewed and compared.
Since its early commercial deployment in the late 1980s, optical fiber has evolved to become the predominant carrier of the globe's communications. Yet, after accommodating the world's exponentially growing appetite for transmitted data for more than three decades, its ability to continue doing so is being challenged by fundamental factors. In this article, we review these factors and examine their consequences in terms of information capacity. In particular, we review the difficulties that are imposed by the nonlinear nature of fiber-optic transmission on the assessment of the capacity and on the definition of fundamental concepts, such as bandwidth and spectral efficiency. We discuss relevant approximations and regimes of operation in which bounds for the capacity can be effectively assessed while covering a broad range of applications ranging from interdatacenter communications to links spanning transoceanic distances. We relate to a broad variety of transmission schemes and discuss the potential benefits of spatial multiplexing with multimode and multicore fibers. State-of-the-art transmission experiments are also reviewed and compared with theoretical capacity bounds.

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