Open AccessReflection based coupling efficiency enhancement in a fluorescent planar concentrator for an optical wireless receiver
Author(s) -
Seonghyeon Cho,
Hyunchae Chun
Publication year - 2021
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.434880
Subject(s) - optics , concentrator , coupling (piping) , materials science , optical power , reflection (computer programming) , specular reflection , optical wireless , bit error rate , planar , optoelectronics , electrical efficiency , enhanced data rates for gsm evolution , power (physics) , wireless , physics , computer science , telecommunications , channel (broadcasting) , laser , computer graphics (images) , quantum mechanics , metallurgy , programming language
Fluorescent planar concentrators have been proposed as optical concentrators that can have both a wide field of view and a high optical gain stemming from a large collection area for optical wireless communications. However, the fluorescent concentrators with such a large collection area often lead to a low light coupling efficiency due to the edge coupling mechanism leading to a considerable optical power loss. In this work, an analysis of the light coupling efficiency enhancement in the electrical power gain is presented. In particular, a practical method to improve the coupling efficiency by introducing edge and back reflection using Lambertian-, specular-, and retro-reflectors is presented. It is demonstrated that by choosing the optimal reflectors, the received signal strength can be improved by more than a factor of two. Also demonstrated with the proposed method is a data rate more than 1.12 Gbps with bit error rate less than 3.8 × 10 -3 using a DC-biased optical orthogonal frequency division multiplexing. This is, to the best of our knowledge, the first Gbps class demonstration using a commercial fluorescent planar concentrator.