Understand the difference between Tophat beam and Gaussian beam in

Lasers are generally Gaussian beams, that is, the beam intensity exhibits a Gaussian distribution in space. Such a beam has a very high intermediate intensity and gradually decreases along with the Gaussian profile.

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PDF] The light distribution in skin of a 976nm laser diode using

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flat-top beams, explained by RP; top-hat beam, supergaussian

Understand the difference between Tophat beam and Gaussian beam in