Gaussian beams, explained by RP Photonics Encyclopedia; laser beam, fundamental transverse modes
Gaussian Beam Optics
Gaussian distribution of the energy across the laser beam intensity... | Download Scientific Diagram
Reshaping a multimode laser beam into a constructed Gaussian beam for generating a thin light sheet - Saghafi - 2018 - Journal of Biophotonics - Wiley Online Library
Beam waist, explained by RP Photonics Encyclopedia; focus, laser beam