Experimental demonstration of WDM-PON based on probabilistic shaped PAM4 modulation format

Qinghua Xiao; Hailian He; Xinxing Wu; Jialin You; Youxu Zeng; Ze Dong

doi:10.1117/12.2522176

14 February 2019 Experimental demonstration of WDM-PON based on probabilistic shaped PAM4 modulation format

Qinghua Xiao, Hailian He, Xinxing Wu, Jialin You, Youxu Zeng, Ze Dong

Proceedings Volume 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018); 110481P (2019) https://doi.org/10.1117/12.2522176
Event: 17th International Conference on Optical Communications and Networks (ICOCN2018), 2018, Zhuhai, China

Abstract

We propose and experimentally demonstrate a 5 × 50-Gb/s wavelength-division-multiplexing passive optical network (WDM-PON) based on probabilistic shaping (PS) 4-level pulse amplitude modulation (PAM4) with direct detection. Each optical carrier at the optical line terminal (OLT) carries a 25-Gbaud PS-PAM4 signal according to the near-Gaussian distribution. The spectral efficiency (SE) of the system can be enhanced under the same average power and received power sensitivity (RPS) by employing PS-PAM4 at the optical network units (ONU). A blind feedback pre-equalization (BFP) based on the joint constant modulus algorithm (CMA) and decision-directed least-mean-squares (DD-LMS) is proposed to accurately compensate the signal high frequency loss of the electro-optical components such as DAC, optical modulators and electrical drivers at the OLT. The experimental results show that the proposed WDM-PON over 20 km single mode fiber (SMF) transmission are with 1.44 dB superior receiver sensitivity by employing PS-PAM4 and additional 0.78 dB device linear impairment effect improvement by BFP.

Citation Download Citation

Qinghua Xiao, Hailian He, Xinxing Wu, Jialin You, Youxu Zeng, and Ze Dong "Experimental demonstration of WDM-PON based on probabilistic shaped PAM4 modulation format", Proc. SPIE 11048, 17th International Conference on Optical Communications and Networks (ICOCN2018), 110481P (14 February 2019); https://doi.org/10.1117/12.2522176

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