Based On Technology Research Clearly Like Algorithm

The free-space laser communication, compared with microwave communication,has the advantage of confidentiality, anti-interference ability, large informationcapability and low power consumption. In communication of satellite to ground, thebroadband communication and military communication, it has wide range of areasapplication and great development prospects. It is disturbed by turbulence because thetransmission medium is atmosphere. The image quality and beam quality would bereduced by turbulence. Image sharpening technology without wavefront sensor couldreduce the system complexity and make the correction result close to idea correctioneffect, it have been proved to be fit for the atmosphere turbulence compensation.In the technology of wave-front sensor-less image-sharpening, we optimize theperformance of the system through optimization algorithm, so we can improve thecommunication quality. Using different optimization algorithms will achieve differenteffect of the correction.In this paper, the optimization control algorithms are the hot-algorithms such asgenetic algorithms, simulated annealing algorithm, non-line mode-based correctionalgorithm and the approximate mode-based correction algorithm, then compare andanalyze the four algorithm.Finding that the approximate mode-based correctionalgorithm is more suitable for real-time wave-front correction.After depth simulating of the approximate mode-based correction algorithm, thisalgorithm is used to correct the static aberration of system and the most of aberration iscorrected only two iterations.