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Time Resolved Holography For Investi Gation Of Yag :Er Laser (λ=2.94µ) - Liquid Water Interaction

In this paper we describe the investigation of interaction of YAG:Er laser radiation with liquid water in micron thickness cell by double exposure holographic interferometry with time delayed sensing. Substantial decrease of refractive index (▵n =-0.3) on a wavelength of probing pulse (λp=0.53μm) during erbium laser pulse in the beam waist was found. Afterwards the formation of shock wave was visualised, as well as the development of 2-D instability behind the shock wave front.