9 November 2016 Effect of nonlinearity saturation on hot-image formation in cascaded saturable nonlinear medium slabs
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Abstract
In high-power laser system such as Petawatt lasers, the laser beam can be intense enough to result in saturation of nonlinear refraction index of medium. Based on the standard linearization method of small-scale self-focusing and the split-step Fourier numerical calculation method, we present analytical and simulative investigations on the hot-image formation in cascaded saturable nonlinear medium slabs, to disclose the effect of nonlinearity saturation on the distribution and intensity of hot images. The analytical and simulative results are found in good agreement. It is shown that, saturable nonlinearity does not change the distribution of hot images, while may greatly affect the intensity of hot images, i.e., for a given saturation light intensity, with the intensity of the incident laser beam, the intensity of hot images firstly increases monotonously and eventually reaches a saturation; for the incident laser beam of a given intensity, with the saturation light intensity lowering, the intensity of hot images decreases rapidly, even resulting in a few hot images too weak to be visible.
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Youwen Wang, Youwen Wang, Zhiping Dai, Zhiping Dai, Xiaohui Ling, Xiaohui Ling, Liezun Chen, Liezun Chen, Shizhuan Lu, Shizhuan Lu, Kaiming You, Kaiming You, } "Effect of nonlinearity saturation on hot-image formation in cascaded saturable nonlinear medium slabs", Proc. SPIE 10016, High-Power Lasers and Applications VIII, 100161I (9 November 2016); doi: 10.1117/12.2245762; https://doi.org/10.1117/12.2245762
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