Abstract:
In order to make the laser beam of linear-array semiconductor laser be better used in laser remote wireless power transmission, a linear-array semiconductor laser beam shaping system based on the set of optical wedges, curved mirrors and prisms was designed. The parameters of components in the system and the theoretical shaping results were derived by numerical calculation. After then the realistic components were processed and the experimental shaping system was built. The experimental results were that the laser spot size after shaping was 9.9cm×9.6cm, energy uniformity was 68.9%, and energy transfer efficiency was 71.3%. The beam quality could meet the requirement of light cell at receiving end for laser space uniformity. The reason of the difference between the simulated and experimental system was analyzed. The results show that the system can simultaneously realize the expanding and collimation of laser beam array along fast axis and slow axis. The system can also adjust the shape and the uniformity of output light spot with less optical components. Light cell components are the key processes of laser wireless power transmission. The study has great practical value for laser conversion efficiency.