Duplex Self-Aligning Resonant Beam Communications and Power Transfer with Coupled Spatially Distributed Laser Resonator

TL;DR

This paper presents a novel self-aligning resonant beam system that enables simultaneous wireless power transfer and high-speed data communication using a coupled spatially distributed resonator, with validated simulations demonstrating its efficiency and operational range.

Contribution

Introduction of a coupled spatially distributed resonator (CSDR) for stable, bidirectional resonant beam communication and power transfer, advancing SLIPT technology with comprehensive analysis and simulations.

Findings

Validated the feasibility of CSDR-SLIPT system through numerical simulations.

Identified stable beam waist locations for efficient mode matching.

Demonstrated effective power transfer over varying distances.

Abstract

Sustainable energy supply and high-speed communications are two significant needs for mobile electronic devices. This paper introduces a self-aligning resonant beam system for simultaneous light information and power transfer (SLIPT), employing a novel coupled spatially distributed resonator (CSDR). The system utilizes a resonant beam for efficient power delivery and a second-harmonic beam for concurrent data transmission, inherently minimizing echo interference and enabling bidirectional communication. Through comprehensive analyses, we investigate the CSDR's stable region, beam evolution, and power characteristics in relation to working distance and device parameters. Numerical simulations validate the CSDR-SLIPT system's feasibility by identifying a stable beam waist location for achieving accurate mode-match coupling between two spatially distributed resonant cavities and demonstrating its operational range and efficient power delivery across varying distances. The research reveals the system's benefits in terms of both safety and energy transmission efficiency. We also demonstrate the trade-off among the reflectivities of the cavity mirrors in the CSDR. These findings offer valuable design insights for resonant beam systems, advancing SLIPT with significant potential for remote device connectivity.