Acta Optica Sinica, Volume. 35, Issue s2, 226001(2015)
Assessment Research of Small-Scale Self-Focusing in Intense Laser Beam by Near-Field Intensity Entropy
Small-scale self-focusing is an important factor threating the safe operation of intense laser facility, and estimating the marginal value of small-scale self-focusing in laser beam is an important part of the guidance for the safe operation of intense laser facility. The method of using near-field intensity entropy of the output laser beam to reflect the small-scale self-focusing development in laser beam is proposed. Then the variation regular pattern of near-field intensity entropy with the development of small-scale self-focusing is studied by numerical simulation. Using this regular pattern, an early-warning method is given for the obvious small-scale self-focusing happening in intense laser facility. By contrast with the methods of modulation ratio and contrast ratio, the proposed method offers a more obvious assessment.
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Liu Rende, Hu Dongxia, Zhao Junpu, Deng Xuewei, Dai Wanjun, Huang Xiaoxia. Assessment Research of Small-Scale Self-Focusing in Intense Laser Beam by Near-Field Intensity Entropy[J]. Acta Optica Sinica, 2015, 35(s2): 226001
Category: Physical Optics
Received: May. 29, 2015
Accepted: --
Published Online: Oct. 8, 2015
The Author Email: Rende Liu (dear_dea@163.com)