title: Effective beam truncation of the fundamental mode in an apertured cavity.
abstract: We consider, in an apertured plano-concave cavity, the TEM(00)-mode loss variations with mirror curvature. We define an effective beam truncation, taking into account the shrinking or widening of the beam that is due to the diffractive lens effect of the aperture.
authors.forename: K
authors.initials: K
authors.lastname: Ait-Ameur
authors.forename: G
authors.initials: G
authors.lastname: Stephan