Frequency-dependent impairment calibration and estimation for a 96 GBaud coherent optical transceiver

Longquan Dai; Ziheng Zhang; Zicai Cao; Shuchang Yao; Tianming Li; Yudi Fu; Jing Dai; Yaqin Wang; Ming Luo; Xi Xiao; Mengfan Cheng; Qi Yang; Ming Tang; Deming Liu; Lei Deng

doi:10.1038/s44172-023-00147-3

Communications Engineering (Jan 2024)

Frequency-dependent impairment calibration and estimation for a 96 GBaud coherent optical transceiver

Longquan Dai,
Ziheng Zhang,
Zicai Cao,
Shuchang Yao,
Tianming Li,
Yudi Fu,
Jing Dai,
Yaqin Wang,
Ming Luo,
Xi Xiao,
Mengfan Cheng,
Qi Yang,
Ming Tang,
Deming Liu,
Lei Deng

Affiliations

Longquan Dai: Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology
Ziheng Zhang: Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology
Zicai Cao: Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology
Shuchang Yao: Fiberhome Telecommunication Technologies Co., LTD
Tianming Li: Fiberhome Telecommunication Technologies Co., LTD
Yudi Fu: Fiberhome Telecommunication Technologies Co., LTD
Jing Dai: Fiberhome Telecommunication Technologies Co., LTD
Yaqin Wang: Fiberhome Telecommunication Technologies Co., LTD
Ming Luo: China Information and Communication Technologies Group Corporation
Xi Xiao: China Information and Communication Technologies Group Corporation
Mengfan Cheng: Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology
Qi Yang: Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology
Ming Tang: Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology
Deming Liu: Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology
Lei Deng: Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information, Huazhong University of Science and Technology

DOI: https://doi.org/10.1038/s44172-023-00147-3
Journal volume & issue: Vol. 3, no. 1
pp. 1 – 10

Abstract

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Abstract For 800 Gbps/λ and beyond optical transmission systems, frequency-dependent impairments (FDI) degrade coherent optical transceiver (CO-TRx) performance severely. Calibration and compensation of such FDI in factories includes amplitude/phase frequency response (AFR/PFR), skew, and ripple for both transmitters(Tx) and receivers (Rx). However, due to the polarization rotation and phase rotation effects in optical link, the separation and extraction of FDI from different polarization or I/Q tributaries is challenging. Here we report a FDI calibration method based on orthogonal separation scheme and frequency domain analysis. The proposal can simultaneously characterize and separate the Tx/Rx sides FDI including AFR, PFR, and time skew of four tributaries. Finally, the effectiveness is demonstrated by transmitting a 96 GBuad Nyquist-16QAM signal on a 64 GBaud-class CO-TRx.

Published in Communications Engineering

ISSN: 2731-3395 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Technology: Engineering (General). Civil engineering (General)
Website: https://www.nature.com/commseng/

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