Quantum Dot-Based Visible Light Communication System for Microalgal Density Analysis

This research presents a visible light communication (VLC) system integrated with quantum dots (QDs), which utilizes light emissions across the blue, green, yellow, and red spectra to assess microalgal density under various conditions. The bit error rate (BER) of the VLC system serves as an intermediary metric to determine microalgal density by analyzing the linear and nonlinear trends of BERs under different data rates and light colors. The maximum average accuracies achieved for <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">E. marina</i> and <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">I. galbana</i> samples are 0.97 and 0.98, respectively, when using blue and yellow light. The proposed method offers high feasibility and flexible color options for microalgal density assessment, with potential applications in smart microalgae cultivation and marine environmental monitoring.