title: Multiple-return-pass beam divergence and the linewidth equation.
abstract: A multiple-return-pass equation for beam divergence that is applicable to multiple-prism grating tunable laser oscillators is derived by use of ray-transfer matrices. This beam divergence is then incorporated into the multiple-return-pass dispersive linewidth equation. A discussion of the application of the equation is given.
authors: F J
authors: FJ
authors: Duarte