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Combined data from digital and classical holographic recording provides insight on early stages of strain soliton formation

Accounting for nonlinear elasticity of modern materials becomes very important due to their rising operation at high dynamic loads. Generation of strain solitary waves (solitons for brevity) is one of the processes of interest, however details of a transformation of an initial impact into the soliton are not completely clear yet. In this paper we demonstrate the advantages of a combination of classical and digital holographic recording for investigation of the early stages of soliton formation. While classical realization of holographic interferometry allowed for visualizing sharp phase gradients representing, in particular, shock waves, digital recording supplied quantitative data on parameters of smoother disturbances evolving in the course of soliton formation. The applied holographic techniques allowed us to monitor the entire process of soliton formation, to visualize intermediate wave patterns and to obtain quantitative data on the resulting soliton.