Adaptive Optics And Its Application In Wireless Laser Communication

The problem of dynamic optic wavefront aberration has puzzled human for hundreds years, and adaptive optics technology proposes an approach to solve this problem. with the development of large-scale laser engineering and optical system, the demand of overcoming dynamic error is urgent. Adaptive optics is used from military, scientific research to civil domain. In this paper, adaptive optics technology is applied in wireless laser communication.However, the channel of wireless optical communication is atmosphere channel, which could absorb and scatter the optical signal. What is worse, the atmospheric turbulence could induce scintting, excursion and splitting of facula during transmission. These phenomena will badly affect the stability and reliability of the wireless optical communication. A new adaptive optics technique is proposed to reduce the effect of atmospheric turbulence.In this thesis, adaptive optics technology is introduced in detail. Based on this, the application of adaptive optics on wireless laser communication is also expatiate. The main contents are as following:(1) Elaborated adaptive optics and its domestic and international development dynamic state. Because of the short development history of adaptive optics technology, in former literature, the definition of adaptive optics was obscure description, even more active optics and adaptive optics garbled. In this paper, the characters of passive optics, active optics and adaptive optics were specific definition, and their contacts and differences and the case of its development were denoted. (2) Summarized the applications of adaptive optical technology in six fields including space exploring, space laser communication, star-ground telescope, nuclear equipment, high-power laser weapon and retina detection.(3) Because background noise will be arose when optical antennas are incepting signals, designed a baffle of cassegrain optical antenna. Designed main baffle, selected radial leaves for ultra-short baffle as the design method which could realize stray radiation suppression. Besides, coneshaped shade tubes for main mirror and second mirror to shelter from stray radiation in maximum were designed.(4) Introduced the principle of Hartmann-Shack wave-front sensor, and analyzed the main factors of influencing sensor measurement accuracy; By discussing the research progresses and development trends of deformable mirrors, expatiated the research and development trends of deformable mirrors, and introduced several novel deformable mirrors which applied in adaptive optics system.(5) Analyzed the influence of atmosphere channel to wireless laser communication, and adopted adaptive optics technology to compensate some phenomenon such as scintting, excursion and splitting of facula induced by atmospheric turbulence during transmission.Specific definition of the characters of passive optics, active optics and adaptive optics and their contacts and differences and the case of its development were denoted; summarized the applications of adaptive optical technology in six fields; designed a baffle of cassegrain optical antenna and adopted adaptive optics technology in wireless laser communication all that bear originality and practicability.