A Gaussian laser beam with w0 = 0.5 cm and a planar phase front is incident on a lens with focal length f = 10 cm. The laser wavelength is λ = 800 nm. a) How far after the lens is the new beam waist located and what is the beam size in that plane? b) What is the new Rayleigh length? c) How much stronger are the focused electric fields than the ones that were incident on the lens?

A Gaussian laser beam with w0 = 0.5 cm and a planar phase front is incident on a lens with focal length f = 10 cm. The laser wavelength is λ = 800 nm. a) How far after the lens is the new beam waist located and what is the beam size in that plane? b) What is the new Rayleigh length? c) How much stronger are the focused electric fields than the ones that were incident on the lens?

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