Iteration Research On Cassegrain Transceiver Antenna Based On Fiber Array

Wireless laser communication is a means of communication which use light as a signal carrier and atmospheric channel as the transmission medium.Optical antenna is an important part of FSO systems.Optical antenna can be able to receive the other end of the optical signal and transmit local terminal optical signal simultaneously.High efficiency antenna transceiver design has become a hot issue,which use optical fiber and fiber optic communications devices mature to achieve the integration of the transceiver,such as:the beam splitter/combiners,dichroic prism etc..This paper presents one optical transceiver antenna systems:Cassegrain antenna transceiver system based on fiber Array:Firstly we introduced the advantages and disadvantages of the Cassegrain antenna structure,and showed how to avoid the blind to improve emission efficiency Cassegrain antenna and the method of transceiver.Secondly we designed a fiber optic transceiver array antenna structure,on the design of cone,the 1°divergence angle of the self-focusing lens tilt 5°,and placed 88mm away from the location as launch by fiber array,placed the receiving spot in the center of the cone by plastic Optical Fiber.The Cassegrain antenna structure avoids the blind spot,so that the emission efficiency of the antenna has improved significantly.Analysis program by zemax simulation,and verify the feasibility of the theory.We analyzed of different distances transceiver spot and receiving coupled power through experiments.We also analyzed of emission spot which satisfy the requirements to receive,and using the beam analyzer measured the emission spot through self focusing lens still is Gauss beam,simultaneously measured the receiving end of the received power,Complete transceiver requirements that antenna system simultaneously transmitting simultaneous reception,and prove the feasibility of the program in the experiment.The experimental results show that:Fiber array antenna systems can successfully launch the spot while the other received a spot and successfully launch coupled into the optical fiber probe,ultimately based transceiver Cassegrain antenna integrated system.