Design And Analysis Of Optical System In Atmosphere Laser Communication

The optical system of atmosphere laser communication is designed and analyzed in this thesis. The optical system is an important part of the optical system of atmosphere laser communication. Its performance analysis and optimization design are key technologies of atmosphere laser communication.In the atmosphere laser communication, the mission of sending the optical system is to gather and shape up the bunch of signal light and to send it with particular space area of strong direction aptitude. The mission of receiving the optical system is receiving light signal from atmosphere and make it focused on electrophotonic detector to detect the signal needed. Based on the recent research of the optical system condition, the text has designed and analyzed the refractive of optical system, including the following aspects:1) According to the demand of the semi-conductor laser beam and the atmosphere laser communication, the relationship of luminous energy coupling efficiency and numerical aperture is analyzed in this thesis, which is different from the method of determining numerical aperture in the imaging optics system. This paper presents a method to determine the numerical aperture of optical collimated system in terms of theluminous energy coupling efficency, makes use of OSLO LT to design and optimize optical collimated system. So the laser beams collimating is implemented by the optical collimated system2) Because the optical transmitting antenna system make the launched light more straight for the purpose of laser expanding system, farther transmission distance, receiving stronger light, and making the aiming and capturing of light signal easier, and the optical receiving antenna system can aim at the blast-off light beam and receive light energy as much as possible and make beam of light focused on eiectrophotonic detector, OSLO LT is employed to design and optimize the refractive of optical antenna system.3) According to the transmission character of semiconductor laser beam and optical antenna system demand of atmosphere laser communication system, the performance of optical antenna system is analyzed theoretically in this thesis, so the optical antenna system is understood. Customer interface is designed to analyze and show the performance of optical antenna system completely and directly. So investigators can study character of optical antenna system conveniently.