Investigating probabilistic constellation shaping for dual-polarization PAM8 signals at different data rates

Kayden L. C. Kaller; Mihail Raytchev; Ahmed Galib Reza; Marcos Troncoso Costas; Liam Barry; Ahmad Atieh

doi:10.1117/12.2648047

15 March 2023 Investigating probabilistic constellation shaping for dual-polarization PAM8 signals at different data rates

Kayden L. C. Kaller, Mihail Raytchev, Ahmed Galib Reza, Marcos Troncoso Costas, Liam Barry, Ahmad Atieh

Author Affiliations +

Proceedings Volume 12429, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XII; 124291E (2023) https://doi.org/10.1117/12.2648047
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

DP-PAM8 modulated signals with probabilistic constellation shaping (PCS) are investigated for ultrahigh-data rates with diverse shaping strengths and DGD values using direct detection for short distances mainly seen in data centers. The investigation is conducted using numerical simulation, where system performance improvement is achieved when PCS is used. The probabilistic shaping mitigated the uncompensated DGD and dispersion effects in the transmission system. We found that the high-powered symbols close the eye causing high symbol error. Applying PCS opens the eye of the highpowered symbols but closes the eye for low-powered ones. Thus, optimization of the strength of shaping is necessary to get the best performance. Experiments were conducted to investigate the effect of probabilistic shaping on PAM8 system amplified using an optical semiconductor amplifier (SOA). A single polarization PAM8 case was only demonstrated due to accessibility limitations of required parts for dual-polarization PAM8.

Conference Presentation

Citation Download Citation

Kayden L. C. Kaller, Mihail Raytchev, Ahmed Galib Reza, Marcos Troncoso Costas, Liam Barry, and Ahmad Atieh "Investigating probabilistic constellation shaping for dual-polarization PAM8 signals at different data rates", Proc. SPIE 12429, Next-Generation Optical Communication: Components, Sub-Systems, and Systems XII, 124291E (15 March 2023); https://doi.org/10.1117/12.2648047

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