Laser-based and LED-based optical wireless communication has attracted a lot of attention in recent years due to advantages over radio RF-based systems. By using light, systems have advantages over RF systems such as immunity to RF interference, high security, lower cost and lower power consumption. LEDs have the advantage that illumination systems can be reused, and that modulation some extra power is needed but a DC bias is already available [1]. LEDs have limitations as their bandwidth is limited. Lasers have wider modulation bandwidths thus provide higher throughput. But in such case, a bottleneck of the system may shift to the receiver side.
by Lev Azarkh, Eindhoven University of Technology at the 3rd edition of the Optical Wireless Communication Conference.
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