Research On The Propagation Properties Of The Dark Hollow Laser Beams In Atmosphere

With the development of hollow laser beam, on its unique transmission characteristics of the study gradually attention has been paid. This paper summarizes some of the method for forming hollow laser beam, introduced several hollow beam in transmission occurs when the "self-focusing" (bridging halo) phenomenon. Paper, a brief description of a new generation of hollow laser beam methods: the use of spectral reflection produced by hollow cone pairs of semi-Gaussian laser beam. The establishment of this new type of hollow beams in weak atmospheric turbulence intensity distribution of media transmission of mathematical model and its use in free space to meet the Collins formula of intensity distribution under the conditions of mathematical models. By calculation and analysis of two models can be seen that the hollow beam in the transmission process intensity distribution pattern does not change, this feature of the ensuing media in the atmosphere of this beam in the transmission experiment was able to verify.