Joint pre-compensation with DRE and THP for low-resolution data center optical interconnect

Yingqiang Hou; Zhenming Yu; Kaixuan Sun; Hongyu Huang; Kun Xu

doi:10.1117/12.2672961

10 April 2023 Joint pre-compensation with DRE and THP for low-resolution data center optical interconnect

Yingqiang Hou, Zhenming Yu, Kaixuan Sun, Hongyu Huang, Kun Xu

Proceedings Volume 12614, 14th International Photonics and Optoelectronics Meetings (POEM 2022); 126140W (2023) https://doi.org/10.1117/12.2672961
Event: 14th International Photonics and Optoelectronics Meeting (POEM 2022), 2022, Wuhan, China

Abstract

We propose a joint pre-compensation method based on digital resolution enhancer (DRE) and Tomlinson-Harashima precoding (THP) for low-resolution data center optical interconnect. DRE is utilized to reduce the quantization noise of the digital-to-analog converter (DAC), while THP is utilized to fall off the frequency fading caused by the system bandwidth limitation and chromatic dispersion. By combining THP and DRE, we can achieve a 112-Gb/s PAM4 system over a 40-km standard single-mode fiber with a physical number of bits (PNOB) = 4 DAC on the transmitter side Moreover, using THP in bandwidth-constrained systems can increase the transmission capacity by 26.15%.

Citation Download Citation

Yingqiang Hou, Zhenming Yu, Kaixuan Sun, Hongyu Huang, and Kun Xu "Joint pre-compensation with DRE and THP for low-resolution data center optical interconnect", Proc. SPIE 12614, 14th International Photonics and Optoelectronics Meetings (POEM 2022), 126140W (10 April 2023); https://doi.org/10.1117/12.2672961

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