Simple and Universal Current Modulator Circuit for Indoor Mobile Free-Space-Optical Communications Testing

The use of LED for illumination and communication together is more and more interesting with the increasing deployment of LEDs to our homes and industrial buildings. Modulation of this kind of light sources is difficult because of high voltage and current demands. Since the LED configurations and va...

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Bibliographic Details
Published inAdvances in electrical and electronic engineering Vol. 12; no. 1; pp. 66 - 74
Main Authors Hejduk, Stanislav, Witas, Karel, Latal, Jan, Vitasek, Jan, Bocheza, Jiri, Vasinek, Vladimir
Format Journal Article
LanguageEnglish
Published Ostrava Faculty of Electrical Engineering and Computer Science VSB - Technical University of Ostrava 01.03.2014
VSB-Technical University of Ostrava
Subjects
current modulator
Electric potential
free space optics
fso
High voltages
Illumination
Industrial buildings
led
Light sources
Lighting
mobile
Modulation
Modulators
network
visible light communication
vlc
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Summary:The use of LED for illumination and communication together is more and more interesting with the increasing deployment of LEDs to our homes and industrial buildings. Modulation of this kind of light sources is difficult because of high voltage and current demands. Since the LED configurations and values of current and voltage are different, our universal modulator has to be able to operate even under these circumstances. This paper proposes simple and universal current modulator for LED lighting modulation for frequencies around 1MHz. Main objective is to allow initial testing of different types of High Power LEDs and different photodetector configurations and circuits in diffusive based Free-Space-Optical networks. In the experimental part we also compare results for some different types of LED light sources.
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ISSN:1336-1376
1804-3119
DOI:10.15598/aeee.v12i1.845