Propagation of coherently combined flattened laser beam array in turbulent atmosphere |
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| Authors: | Pu Zhou Zejin Liu Xiaojun Xu Xiuxiang Chu |
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| Institution: | 1. Czech Hydrometeorological Institute, Prague, Czech Republic;2. Charles University in Prague, Faculty of Science, Institute for Environmental Studies, Czech Republic;3. National Institute of Public Health, Prague, Czech Republic;4. Institute of Computer Science, Academy of Sciences of the Czech Republic, Prague, Czech Republic;5. Czech Institute of Informatics, Robotics, and Cybernetics, Czech Technical University in Prague, Prague, Czech Republic |
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| Abstract: | The analytical expression for the propagation of a flattened laser beam array in a turbulent atmosphere is derived based on extended Huygens–Fresnel principle. The influence of beam order and turbulent atmosphere on beam quality is studied. It is revealed that the beam quality of a coherently combined laser beam array with higher order is better than its lower order counterpart when propagating in free-space, weak and medium turbulence (i.e. Cn2<10?13 m?2/3). The beam quality of higher order beam arrays degrades faster as the intensity of turbulence gets stronger. In the case of propagating in strong turbulence, the beam order has no influence on coherently combined beam quality. |
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