Experimental End-to-End Optimization of Directly Modulated Laser-based IM/DD Transmission

• URL: http://arxiv.org/abs/2508.19910v1
• Date: Wed, 27 Aug 2025 14:13:59 GMT
• Title: Experimental End-to-End Optimization of Directly Modulated Laser-based IM/DD Transmission
• Authors: Sergio Hernandez, Christophe Peucheret, Francesco Da Ros, Darko Zibar,
• Abstract summary: We study the end-to-end optimization of DML-based systems based on a data-driven surrogate model trained on experimental data.<n>Results show that the proposed end-to-end scheme is able to deliver better performance throughout the studied symbol rates and transmission distances.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Directly modulated lasers (DMLs) are an attractive technology for short-reach intensity modulation and direct detection communication systems. However, their complex nonlinear dynamics make the modeling and optimization of DML-based systems challenging. In this paper, we study the end-to-end optimization of DML-based systems based on a data-driven surrogate model trained on experimental data. The end-to-end optimization includes the pulse shaping and equalizer filters, the bias current and the modulation radio-frequency (RF) power applied to the laser. The performance of the end-to-end optimization scheme is tested on the experimental setup and compared to 4 different benchmark schemes based on linear and nonlinear receiver-side equalization. The results show that the proposed end-to-end scheme is able to deliver better performance throughout the studied symbol rates and transmission distances while employing lower modulation RF power, fewer filter taps and utilizing a smaller signal bandwidth.

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