A Superimposed QD-Based Optical Antenna for VLC: White LED Source

Abstract

Visible light communication (VLC) is a versatile enabling technology for following high-speed wireless communication because of its broad unlicensed spectrum. In this perspective, white light-emitting diodes (LED) provide both illumination and data transmission simultaneously. To accomplish a VLC system, receiver antennas play a crucial role in receiving light signals and guiding them toward a photodetector to be converted into electrical signals. This paper demonstrates an optical receiver antenna based on luminescent solar concentrator (LSC) technology to exceed the conservation of etendue and reach a high signal-to-noise ratio. This optical antenna is compatible with all colors of LEDs and achieves an optical efficiency of 3.75%, which is considerably higher than the similar reported antenna. This antenna is fast due to the small attached photodetector—small enough that it can be adapted for electronic devices—which does not need any tracking system. Moreover, numerical simulation is performed using a Monte Carlo ray-tracing model, and results are extracted in the spectral domain. Finally, the fate of each photon and the chromaticity diagram of the collected photons’ spectra are specified.

Efficient White-Light Visible Light Communication With Novel Optical Antennas Based on Luminescent Solar Concentrators

“…The photon transport in the slabs has been simulated by implementing a Monte Carlo model developed using MAT-LAB programming language [60] and following previous literature on ray-tracing computational models [50], [61]- [63],…”

“…In [49] an OA design using three distinct commercially available fluorescent fibers is presented, selectively absorbing different wavelength ranges, such as to cover the spectrum of a WLED. Similarly, in [50] a simulationbased scheme for an OA integrating three distinct fluorophores is suggested, with no experimental confirmation for the proposed scheme. To fill the gap in unleashing the full potential of VLC with WLED sources, in this paper we build and test OAs exploiting two organic fluorophores (OF) originally developed and successfully employed for solar conversion, namely Lumogen Red© 305 F (LR305), the commercial benchmark for Luminescent Solar Concentrator (LSC) applications [51], [52] and DQ1, a recently synthesized quinoxaline chromophore that was reported to feature excellent optical properties in LSC.…”

A Review–Unguided Optical Communications: Developments, Technology Evolution, and Challenges

“…VLC has various features, such as its low cost, it being highly secured compared to RF systems, it receiving no interference from RF signals, no intensity interference, its spectral reusability in the adjacent channel and/or adjacent rooms, a lack of penetration through walls, and coverage extension by using spatially separated spot beams [262]. As with Li-Fi, VLC systems can be used in various fields such as in EMI sensitive areas (such as hospitals and aircraft cabins), in industrial environments with intense EM radiation (such as power plants and fabrication units), as an alternative to Wi-Fi (in living rooms, offices, shopping malls, and dense retail/public surroundings), and in smart lighting infrastructure with Internet-of-Things (IoT) applications [263].…”