  High-power and high-rate simultaneous wireless information and power transfer
(SWIPT) becomes more and more important with the development of Internet of
Things technologies. Optical SWIPT, also known as simultaneous light
information and power transfer (SLIPT), has unique advantages such as abundant
spectrum resources and low propagation divergence, compared with
radio-frequency (RF) SWIPT. However, optical SWIPT faces many challenges in
beam steering and receiver positioning/tracking. Resonant beams generated by
spatially separated laser resonators (SSLR) have many advantages, including
high power, self-aligned mobility, and intrinsic safety. It has been proposed
as the carrier of wireless charging and communication. Using resonant beams,
mobile electronic devices can be remotely charged and supported with high-rate
data transfer. In this paper, we propose a mobile optical SWIPT system based on
asymmetric SSLR and present the system optimization procedure. We also
determine the boundary of the charging power and communication rate, and
discuss the trade-off between power transfer and information transfer.
Numerical results show that both the charging power and the communication rate
of the optimized asymmetric system are much higher than those of the symmetric
system in the previous work.
