16 November 2010 Control of high power laser in nonlinear media by lens-focusing and beam self-focusing
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In this paper, we firstly preliminary analyzed how to control the collapse position of beam when intensity and beam waist have been varied by the laser self-focusing in nonlinear media and lens-focusing. We obtain the relations of the focusing position with input power and focal length of lens. The length of focusing is inversely proportional to the input power and directly proportional to focal length of lens. Secondly, Based on the nonlinear propagation equation and split-step Fourier method, we investigate how to control the focal distance and beam quality of high-power laser at focusing spot in nonlinear media. We can control the focusing spot at any position by changed power and lens. The numerical simulations is good consistent with theoretical analysis.
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Hui Liu, Hui Liu, Xiquan Fu, Xiquan Fu, Yanchao Hou, Yanchao Hou, Jianqin Deng, Jianqin Deng, "Control of high power laser in nonlinear media by lens-focusing and beam self-focusing", Proc. SPIE 7843, High-Power Lasers and Applications V, 78430N (16 November 2010); doi: 10.1117/12.870409; https://doi.org/10.1117/12.870409

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