title: Transverse modes of an apertured laser.
abstract: Modes of a diaphragmed laser are expressed as linear combinations of Laguerre-Gauss functions and computed from the resonance condition. Hard and soft apertures are considered. Explicit results are given in both cases for the phase and amplitude distributions inside and outside a plano-concave cavity and for the three modes having the lowest losses. Deformations of modes with the diameter of the diaphragm are also given, showing the evolution of lateral lobes.
authors.forename: L Y
authors.initials: LY
authors.lastname: Wang
authors.forename: G
authors.initials: G
authors.lastname: Stephan