Experimental Comparison of Cap and Cup Probabilistically Shaped PAM for O-Band IM/DD Transmission System
Md Sabbir-Bin Hossain, Georg Boecherer, Talha Rahman, Nebojsa, Stojanovic, Patrick Schulte, Stefano Calabr\`o, Jinlong Wei, Christian, Bluemm, Tom Wettlin, Changsong Xie, Maxim Kuschnerov, and Stephan Pachnicke
TL;DR
This paper experimentally compares uniform and probabilistically shaped PAM schemes for 200Gbit/s optical transmission, showing that cap-shaped PAM-8 offers superior receiver sensitivity over other variants in back-to-back and 20km tests.
Contribution
It provides a comparative analysis of probabilistic shaping techniques for PAM in high-speed optical systems, highlighting the advantages of cap-shaped PAM-8.
Findings
Cap-shaped PAM-8 achieves up to 3.50dB better sensitivity.
Probabilistic shaping improves performance over uniform schemes.
Performance gains are demonstrated in back-to-back and 20km transmission tests.
Abstract
For 200Gbit/s net rates, uniform PAM-4, 6 and 8 are experimentally compared against probabilistic shaped PAM-8 cap and cup variants. In back-to-back and 20km measurements, cap shaped 80GBd PAM-8 outperforms 72GBd PAM-8 and 83GBd PAM-6 by up to 3.50dB and 0.8dB in receiver sensitivity, respectively
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