Experimental Implementation and Theoretical Investigation of a Vanadium Dioxide Optical Filter for Bit Error Rate Enhancement of Enhanced Space Shift Keying Visible Light Communication Systems

Abstract

Visible Light Communication (VLC) systems use light-emitting diode (LED) technology to provide high-capacity optical links. The advantages they offer, such as the high data rate and the low installation and operational cost, have identified them as a significant solution for modern networks. However, such systems are vulnerable to various exogenous factors, with the background sunlight noise having the greatest impact. In order to reduce the negative influence of the background noise effect, optical filters can be used. In this work, for the first time, a low-cost optical vanadium dioxide (VO2) optical filter has been designed and experimentally implemented based on the requirements of typical and realistic VLC systems in order to significantly increase their performance by reducing the transmittance of background noise. The functionality of the specific filter is investigated by means of its bit error rate (BER) performance estimation, taking into account its experimentally measured characteristics. Numerous results are provided in order to prove the significant performance enhancement of the VLC systems which, as it is shown, reaches almost six orders of magnitude in some cases, using the specific experimental optical filter.

Laser-Microstructured ZnO/p-Si Photodetector with Enhanced and Broadband Responsivity across the Ultraviolet–Visible–Near-Infrared Range

“…The response of this device to NIR light is attributed to sulfur-related states incorporated in the bandgap of silicon. Such detectors can be used in a wide range of applications, requiring the detection of known sources of radiation from the ultraviolet to the infrared, including the infrared wavelengths used in telecommunications as well as visible light communications, 66 without having to switch to high-cost detectors made of materials other than silicon. These results pave the way for the development of highly responsive, low-cost, broadband photodiodes compatible with monolithic integration with silicon-based electronics that go beyond the spectral capabilities of typical silicon photodetectors.…”

Study on Optical Positioning Using Experimental Visible Light Communication System

“…[1,2]. Many references in the open technical literature demonstrate that the visible light communication systems utilizing either light-emitting diodes (LEDs) or lasers could be quite a promising alternative for present-day and even future high-capacity wireless networks [3][4][5][6].…”

Broadband wavelength-selective isotype heterojunction n+-ZnO/n-Si photodetector with variable polarity

“…[5], [6], [7], [8] Self-powered photodetection is desirable for the development of Visible Light Communication (VLC) systems, Internet of Things (IoT) systems, triboelectric nanogenerators, etc. [5], [6], [9], [10] However, the development of blue-UV optoelectronic devices based on ZnO homojunctions is hindered by the difficulty in introducing reproducibly high-quality p-type impurities in ZnO, which exhibits intrinsically n-type conductivity due to bulk defects, such as oxygen vacancies and zinc interstitials. [1], [3], [4] Therefore, ZnO is usually combined with p-doped semiconductors, most commonly with silicon, which is a narrow-bandgap material and extends the operation of ZnO optoelectronic devices to the visible-near infrared (vis-NIR) spectral range.…”