Simplified coherent optical transmissions utilizing noise shaping and non-integer-oversampling clock data recovery

Haotian Mu; Lin Sun; Mingzhu Yin; Fan Li; Zhaohui Li; Gordon Ning Liu; Yi Cai; Gangxiang Shen

doi:10.1117/12.3018204

18 March 2024 Simplified coherent optical transmissions utilizing noise shaping and non-integer-oversampling clock data recovery

Haotian Mu, Lin Sun, Mingzhu Yin, Fan Li, Zhaohui Li, Gordon Ning Liu, Yi Cai, Gangxiang Shen

Author Affiliations +

Proceedings Volume 13104, Advanced Fiber Laser Conference (AFL2023); 131040I (2024) https://doi.org/10.1117/12.3018204
Event: Advanced Fiber Laser Conference (AFL2023), 2023, Shenzhen, China

Abstract

To meet the ever-increasing demand for data traffic, the simplified coherent optical communications, which exhibit the advantages of low cost, low power consumption and high capacity, have garnered the widespread attention for short-reach optical communications applications. To further reduce the cost of coherent optical transmissions, we for the first time propose and demonstrate the capability of non-integer-oversampling clock data recovery (CDR) to process the noise-shaped signals which is robust to the quantization noise when using cheap digital-to-analog converters (DACs). The 192-Gbps dual-polarization quadrature amplitude modulation- 16 (DP-QAM-16) transmissions are experimentally realized by jointly implementing the noise shaping (NS) technique and 4/3 samples per symbol (sps) CDR processing. Experimental results indicate that 1.2- and 1-dB Q factor gains have been achieved by using the proposed simplified coherent optical transmission structure, under the constraints of 3- and 4-bit quantization respectively. We believe that the joint implementation of NS and non-integer-oversampling CDR is promising for simplifying the coherent optical transmissions for low-cost optical communications applications.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Haotian Mu, Lin Sun, Mingzhu Yin, Fan Li, Zhaohui Li, Gordon Ning Liu, Yi Cai, and Gangxiang Shen "Simplified coherent optical transmissions utilizing noise shaping and non-integer-oversampling clock data recovery", Proc. SPIE 13104, Advanced Fiber Laser Conference (AFL2023), 131040I (18 March 2024); https://doi.org/10.1117/12.3018204

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