Performance of a High Power and Capacity Mobile SLIPT Scheme

TL;DR

This paper introduces a novel mobile SLIPT scheme using a spatially separated laser resonator and intra-cavity second harmonic generation, enabling high-power wireless charging and high data rates without complex beam steering.

Contribution

It proposes a new laser-based SLIPT system that simplifies alignment and enhances power and data transfer efficiency for indoor mobile device applications.

Findings

Achieves watt-level charging power at 6 meters

Provides over 10-bit/s/Hz data rate

Eliminates need for receiver positioning and beam steering

Abstract

The increasing demands of power supply and data rate for mobile devices promote the research of simultaneous wireless information and power transfer (SWIPT). Optical SWIPT, as known as simultaneous light information and power transfer (SLIPT), has the potential for providing high-capacity communication and high-power wireless charging. However, SLIPT technologies based on light-emitting diodes have low efficiency due to energy dissipation over the air. Laser-based SLIPT technologies need strict positioning accuracy and scanning resolution, which may lead to the increase of costs and complexity. In this paper, we propose a mobile SLIPT scheme based on spatially separated laser resonator (SSLR) and intra-cavity second harmonic generation. The power and data are transferred via separated frequencies, while they share the same self-aligned resonant beam path, without the needs of receiver positioning and beam steering. We establish the analysis model of the resonant beam power and its second harmonic power. Numerical results show that the proposed system can achieve watt-level battery charging power and above 10-bit/s/Hz achievable rate at 6-m distance, which satisfies the requirements of most indoor mobile devices.