title: Distributed aperture effect in laser rods with negative lenses: a discussion.
abstract: The difference between a ray transfer matrix in a lenslike medium and a section of lenslike medium immersed in vacuum is demonstrated. The distributed aperture and useful volume are calculated for a laser rod with negative lenses ground on the ends, using a multiplication of ray transfer matrices and the deductive method used by Barnes and Scalise. The results we obtained are different from their results.
authors.forename: S
authors.initials: S
authors.lastname: Chang-de
authors.forename: P
authors.initials: P
authors.lastname: Kun-Shih