摘要
A sunlight communication system is proposed that uses Sr2Si5N8:Eu2+phosphors to concentrate sunlight signals in strong background light noise;thus,a wide spectrum sunlight communication system is converted into a narrow spectrum one.A communication method is proposed to enable compression to the dark line H-α(656.28 nm)spectrum.A 50% solar energy conversion efficiency is achieved with a 0.3μs code delay,a0.2μs code rise time(20%–80%),and a 96% optical transmittance.Experimental results show that phosphors enhance the sunlight intensity 1.5 times with the same distance.This method has immense potential in future long-distance sunlight communication.
A sunlight communication system is proposed that uses Sr2Si5N8:Eu2+ phosphors to concentrate sunlight signals in strong background light noise; thus, a wide spectrum sunlight communication system is converted into a narrow spectrum one. A communication method is proposed to enable compression to the dark line H-α（656.28 nm） spectrum. A 50% solar energy conversion efficiency is achieved with a 0.3 μs code delay, a0.2 μs code rise time（20%–80%）, and a 96% optical transmittance. Experimental results show that phosphors enhance the sunlight intensity 1.5 times with the same distance. This method has immense potential in future long-distance sunlight communication.
作者
Haichao Guo
Tao Shan
Li Li
Li Zhang
Xiaojun Li
Han Gao
郭海超;单涛;李立;张立;李小军;高寒(School of Information and Electronics,Beijing Institute of Technology,Beijing 100081,China;National Key Laboratory of Science and Technology on Space Microwave,Xi'an 710100,China;China Academy of Space Technology(Xi’an),Xi'an 710100,China;Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100094,China)
