The New Indoor Wireless Optical Interconnection Model And Optical System Design

In recent years, wireless optical communication (WOC) have made obvious development in communication area by many of its advantages as huge capacity, low disturbance, low cost, etc.. On the other side, big development of the internet in the last decade of last century had made the requirement of electron terminal higher and higher. Nowadays, traditional RF wireless network can just satisfied many communicating application, but it is not sure in the future. The Indoor Optical Wireless Link (IOWL) as one research branch of wireless optical communication not only inherit merits of WOC but also conquer the vices in both wire and wireless system very well, and it will play a big role in future communication area.In the model of IOWL, the characteristics and some shortages of traditional IOWL system has been discussed. Then, a new type model of IOWL has been proposed. In this new type model a optical antenna is employed to collect upward signal light into a single model fiber, then, the light go through of optical amplifier, optical filters and WDM system to arrive at optical control modulation. In this model, photoelectric conversion part is eliminated in transmission, and safety transmission has been achieved by employing 1550nm infrared wave. And, the affect from indoor air channel has been considered. The modulation mode has been calculated and analyzed as well.This article designed the receiver antenna of center spot by series of calculation,experiment and simulation, so that solved the crucial problem of hardware in indoor optical link system. In the process of designing optical lenses, firstly, this article has researched some basic issues such as parameters of glass, refraction rules and reflection loss of optical lens. In addition, the environment which indoor optical antenna faces to is quite different from the outdoor antenna system. The unique points are short distance, low power and incandescent noise except affection of rains and fogs which usually be found in outdoor. Based on these research and conditions, this article has designed a series of optical lenses which have an 80 degrees angle of field by using the optical design software"ZEMAX". And in the same time, the Seidel Aberrations have been minimized in optimization process. Sequentially, the capability of the lens has greatly improved. At the end of this article, some verification experiments have used on the coupling antenna systems, and the results proved that the system is relative perfect and feasible.