Kramers–Kronig Transmission with a Crosstalk-Dependent Step Multiple-Input Multiple-Output Volterra Equalizer in a Seven-Core Fiber

Feng Tian; Tianze Wu; Chao Yu; Chuxuan Wang; Mohai Yue; Ran Gao; Qi Zhang; Zhipei Li; Qinghua Tian; Fu Wang; Xiangjun Xin

doi:10.3390/photonics10091017

Photonics (Sep 2023)

Kramers–Kronig Transmission with a Crosstalk-Dependent Step Multiple-Input Multiple-Output Volterra Equalizer in a Seven-Core Fiber

Feng Tian,
Tianze Wu,
Chao Yu,
Chuxuan Wang,
Mohai Yue,
Ran Gao,
Qi Zhang,
Zhipei Li,
Qinghua Tian,
Fu Wang,
Xiangjun Xin

Affiliations

Feng Tian: State Key Laboratory of Information Photonics and Optical Communications, Beijing Key Laboratory of Space-Ground Interconnection and Convergence, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
Tianze Wu: State Key Laboratory of Information Photonics and Optical Communications, Beijing Key Laboratory of Space-Ground Interconnection and Convergence, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
Chao Yu: Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
Chuxuan Wang: China Electronics Technology Group, Beijing 100041, China
Mohai Yue: State Key Laboratory of Information Photonics and Optical Communications, Beijing Key Laboratory of Space-Ground Interconnection and Convergence, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
Ran Gao: Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
Qi Zhang: State Key Laboratory of Information Photonics and Optical Communications, Beijing Key Laboratory of Space-Ground Interconnection and Convergence, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
Zhipei Li: Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
Qinghua Tian: State Key Laboratory of Information Photonics and Optical Communications, Beijing Key Laboratory of Space-Ground Interconnection and Convergence, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
Fu Wang: State Key Laboratory of Information Photonics and Optical Communications, Beijing Key Laboratory of Space-Ground Interconnection and Convergence, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
Xiangjun Xin: State Key Laboratory of Information Photonics and Optical Communications, Beijing Key Laboratory of Space-Ground Interconnection and Convergence, School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

DOI: https://doi.org/10.3390/photonics10091017
Journal volume & issue: Vol. 10, no. 9
p. 1017

Abstract

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In this paper, we experimentally demonstrate a net bit rate of 261.7 Gbit/s in a seven-core transmission system with a Kramers–Kronig (KK) receiver. The 10 GBaud 16-level quadrature amplitude modulation (QAM) signal is transmitted over a 2.5 km seven-core fiber, and the relationship between carrier-to-signal power ratio, signal power, frequency spacing, and optical power is analyzed. Moreover, a multiple-input multiple-output (MIMO) Volterra equalization algorithm with crosstalk-dependent steps is proposed to compensate for inter-core crosstalk and impairments induced by other devices. Compared to the single-input single-output (SISO) Volterra equalizer, the CSPR can be reduced by 1.3 dB, and the received power gain can reach up to 0.7 dB.

Published in Photonics

ISSN: 2304-6732 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics
Website: http://www.mdpi.com/journal/photonics

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