"Gaussian" . "waist" . "Gaussian beam#Hermite-Gaussian modes" . "Gouy phase-shift" . "gaussian laser" . "Hermite-Gaussian modes" . "Gaussian beam propagation" . . . . "Gaussian beam" . "hypergeometric-Gaussian mode" . "Gouy phase" . "Gaussian-shaped mode" . . . "Gaussian beam" . "Gaussian Optics" . . . "Hypergeometric-Gaussian modes" . "Laguerre-Gaussian modes" . . "Gaussian beam#Laguerre-Gaussian modes" . "spot size" . "Gaussian beams" . "Gaussian beam width" . . "Gaussian laser beams" . . "Gaussian beam#Beam waist" . "Gaussian beam#Gouy phase" . . "hypergeometric-Gaussian modes" . "gaussian beam" . "Gouy phase shift" . "Gaussian_beam#Gouy_phase" . "diffraction-limited" .