112 Gb/s transmission over 80 km SSMF using PDM-PAM4 and coherent detection without optical amplifier

Xian Zhou, Kangping Zhong, Jiahao Huo, Lei Gao, Yiguang Wang, Liang Wang, Yanfu Yang, Jinhui Yuan, Keping Long, Li Zeng, Pak Tao Lau, Chao Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

18 Citations (Scopus)


Polarization-division-multiplexed (PDM) four-level pulse amplitude modulation (PAM4) with coherent detection is a promising low cost solution for 80 km inter-datacenter transmissions at 100 Gb/s and beyond. In this paper, three modified adaptive equalization algorithms for the PDM-PAM4 optical coherent systems, i.e. signal-phase aid least-mean-square (SP-LMS) algorithm, training multi-modulus algorithm (TMMA) and cascaded four-modulus algorithm (CMMA-4), are proposed and compared. Based on the proposed algorithms, 112 Gb/s PDM-PAM4 transmission over 80 km standard single mode fiber (SSMF) in C-band for a bit error rate (BER) below 3.8e-3 is successfully demonstrated without optical amplifier, chromatic dispersion (CD) pre-compensation and extra carrier recovery operations.
Original languageEnglish
Pages (from-to)17359-17371
Number of pages13
JournalOptics Express
Issue number15
Publication statusPublished - 25 Jul 2016

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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