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So, from RF transmission~ wavelength has been shorten down to optical areas and developed data transmissions by using optical wavelengths.
optical wireless communication (OWC), which offers practically an unlimited bandwidth (400 THz), includes infrared (IR), visible (VL) and ultraviolet (UV) sub-bands, as shown in Fig.
The use of these bands for communications purposes offers unique opportunities, which remains mostly unexplored so far.
In comparison to the RF counterparts, OWC enjoys superior features such as ultra-high bandwidth, robustness to electromagnetic interference, unlimited frequency and inherent physical security.
Furthermore, since OWC technologies can be operated in the unregulated spectrum, no licensing fee is required thus leading to a cost-effective solution for a number of applications.
And our lab has researched optical wireless communications using IR regions, with optical phased arrays which has been mainly discovered for LiDAR.
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IEEE/ICACT20220159 Slide.03
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