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Title: 112 Gb/s transmission over 80 km SSMF using PDM-PAM4 and coherent detection without optical amplifier
Authors: Zhou, X
Zhong, K
Huo, J
Gao, L
Wang, Y
Wang, L
Yang, Y
Yuan, J
Long, K
Zeng, L
Lau, APT 
Lu, C 
Issue Date: 2016
Publisher: Optical Society of America
Source: Optics express, 2016, v. 24, no. 15, p. 17359-17371 How to cite?
Journal: Optics express 
Abstract: 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.
EISSN: 1094-4087
DOI: 10.1364/OE.24.017359
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