| Wireless laser communication has been widely used because of its large channel capacity,strong security,flexible networking and other advantages.In order to improve the link performance of wireless laser communication system,multi-aperture transmission technology has been developed rapidly.In this paper,a wireless laser communication optical transceiver is designed which using the multi-aperture transmitting technology,and the communication performance of this transceiver is studied.Firstly,the application status of wireless laser communication and the advantages and disadvantages of multi-aperture transmission technology have been introduced in this paper.Secondly,this paper introduces the basic concept of wireless laser communication system,deeply studies the composition principle and related technology of it,and an optical transceiver with multi-aperture transmission system has been designed which using the1550 nm band signal light,50.8mm receiving aperture and 20 mm transmitting aperture,focusing on the analysis of various link loss factors in this set of optical transceiver,and the specific measurement solutions have been given,and using the MATLAB to simulate link energy,the result shows that the performance of multi-aperture transmission system is better than the single-aperture transmission system.Then,the theoretical analysis and calculation of the communication link are carried out around the coaxiality deviation existing in the multi-aperture transmission system.At last,an experimental platform has been built indoors,a large-aperture collimator is used to adjust the system of the optical transceiver,and the communication experiment has also been set up outdoors to achieve link connectivity.The three times of the experiment all show that the signal light is transmitted successfully from the transmitting to the receiving,the feasibility of this set of optical transceiver has been verified. |
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