Diode laser-based broad spectrum solid-state lighting and visible light communication

In response to the growing health issues linked to prolonged screen time in indoor settings, there is a need for artificial lighting that mimics natural sunlight to support anti-aging, enhance work productivity, regulate sleep patterns, and ensure secure communication. This study presents the development of a cost-effective, laser-driven solid-state lighting source utilizing a combination of inorganic yellow, green, red, and deep-red phosphor. The broad-spectrum laser source (BSLS) shows distinct advantages, particularly high color purity (76.8 % ± 0.5 %), high color rendering index (96 ± 0.5 %), and a 200 % enhancement in color gamut compared to the primary tri-colors. BSLS demonstrates a 91.4 ± 2.5 % reduction in blue light hazard relative to a narrow band source, such as conventional white LED. Simultaneously, the feasibility of visible light communication utilizing BSLS demonstrates a data rate of up to 20 kbps for baseband signals. A comprehensive guidance on health-friendly illumination source with real-time communication features is provided. The correlated and uncorrelated noise factors, such as jitter (time-error) and interference, quality factor, extinction ratio, and rise and fall time of the link designed using BSLS, are presented in detail.