A Laser Simultaneous Wireless Information and Power Transfer (LSWIPT) system based on Pulse Position Modulation (PPM) has been proposed. To achieve the goals of high power and high communication rates, a novel approach utilizing a combination of high-amplitude constant DC current and pulse current at the transmitter has been adopted. In this scheme, constant DC current serves as the primary power output, while pulse current accounts for a smaller portion. Additionally, a laser pulse current source based on LCL resonant converter has been designed to facilitate L-PPM (Single Pulse Position Modulation) by dynamically adjusting the position of the pulse current while maintaining a constant duty cycle. This innovative technique ensures stable pulse power while allowing for the loading of information, effectively decoupling power and information transmission within the system. Furthermore, a system prototype has been constructed and the feasibility of the proposed approach has been validated through a comprehensive analysis involving both simulation and experimental methods. Under the condition of transmitting high power in the system, the communication rate also rises to 400 kbps.