Pb. 1 A fundamental Gaussian beam from a Ti:Sapphire laser with a wavelength of 759nm and a power of 1mW incident on a target far from the minimum waist point by 100m. If the radius of the minimum waist is 2mm, 1- find the beam waist. 2- spot size at the target? 3- Calculate the radius of wavefront curvature. 4- peak intensity of the beam
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