Research On Fiber-Coupled Technology Of Sunlight

In recent years, the energy issue has become the biggest problem constraints to human development.This problem can be solved by rational utilization of solar energy. There are energy conversion in the traditional way of utilizing solar energy, in the conversion process, a large part of energy be lost. The research of sunlight fiber-coupled technology will wide the domain of solar utilization, solar energy is used in lighting or pumped solid state laser pump sources directly. So the sunlight fiber-coupled efficiency directly affects the development of the above two applications.Basic theory of optical fiber coupling are introduced,optical fiber coupling factors are analyzed in detail.According to the sunlight spectrum test results for Changchun area. Designed optimization with ZEMAX software for optical fiber-coupled system. By optimizing the aberrations, the radius of spot size is45.641μm, aperture angle of image space is9.0902°.and the total length of system is525.7mm. According to the optical design results design an accuracy of0.1mm mechanical structure which to ensure the coaxial optical system, and processed into a Kind. To improve fiber-coupled efficiency of the sunlight, also designed for sunlight fiber-coupled system supporting the sunlight tracking system. Finally the sunlight fiber-coupled experiments, respectively, on the quartz optical fiber and plastic optical fiber, and a liquid core optical fiber measurements, the final result is:With quartz optical fiber as transfer fiber coupling efficiency highest can achieve55.55%,when use the plastic optical fiber highest coupling efficiency is51.25%,the coupling efficiency highest is43.61%when use the liquid core optical fiber, and the experiments verify the sun tracking system operation.