Study Of Optical Receiving Antenna Of Indoor Visible Light Communication Based On Holographic Optical Element

Indoor lighting communication system is an indoor wireless communicationtechnology based on white LED, it is developed in recent years and could also becalled indoor visible light communication（VLC）system. This technology is safe andenergy saving. Moreover, it has no electromagnetic interference, and don’t have toapply for electromagnetic spectrum. So, it could be a great candidate in some specialplaces.Compared with ordinary optical elements, holographic optical elements (HOE)have better performance, lower price, easier to manufacture, light weight, and manyother advantages. HOE also can be integrated with a variety of optical functions.Therefore, this paper presents a method for the design and production of opticalreceiving antenna of indoor visible light communication based on holographic opticalelements. The hologram called a holographic optical receiving antenna, which has thedual function of gathering beam and filtering ambient wave, is made fromholographic material by using the principle of interference and diffraction. Theangular selectivity, wavelength selectivity and diffraction efficiency at any point ofthe novel optical receiving antenna have been analyzed by Coupled Wave Theory andK Vector Closed Legitimate. Finally, experimental verification is carried out.The main contents of the thesis are as follows:1. The key technologies of indoor VLC have been analyzed at first. The currenttypes of indoor VLC system optical receiving antenna and shortcomings also havebeen introduced to give the significance of this study.2. According to the characteristics and principles of holographic optical imaging,the design ideas of holographic optical receiving antenna is presented. The formationof hologram called holographic optical receiving antenna, using off-axis reflectivesystem, is recorded by the plane reference waves and converging spherical signalwaves in the holographic photopolymer material.3. On the one hand, it is deduced and analyzed by K vector closed legitimate that thedistribution of holographic optical receiving antenna’s stripes in general and the magnitude and direction of the stripes at any point. On the other hand, it is alsodeduced and analyzed by Kogelnik coupled wave theory that the three performancesof the holographic optical receiving antenna, which is the angular selectivity, thewavelength selectivity and diffraction efficiency, and simulation analysis is carriedout.4. Details of the specific experimental process of recording the holographicoptical receiving antenna are introduced and verification of the white LED lightsource’s reproduction is carried out. It is found that the results of experimentalverification are consistent with theoretical analysis. A monochromatic converged lightspot is formed at the point of convergence of the signal light. Finally, the performanceof holographic optical receiving antenna is tested, obtained the holographic opticalreceiving antenna making of photopolymer can be used for indoor visible lightcommunication system.