Implementation of a fiber-based resonant beam system for multiuser optical wireless information and power transfer

A fiber-based resonant beam system is proposed for a simultaneous optical wireless information and power transfer (OWIPT) system. A fiber Bragg grating and an optical circulator are used to achieve simultaneous wireless optical communication and power transmission. In the receiver subsystem, a communication and energy harvesting circuit is employed to separate alternating current (AC) and direct current (DC) outputs. The AC output is used for information transmission, and the DC output is used for power transfer. We conducted experiments to test the built-in safety mechanism to verify whether the resonant beam stops immediately if any obstacle obstructs the line of sight of the system. The proposed architecture can be constructed for indoor and outdoor multiuser applications. The results demonstrated that the proposed fiber-based resonant beam system can be implemented successfully for simultaneous OWIPT.