title: Laser-induced breakdown in H2 gas at 248 nm.
abstract: Measurement of optical breakdown threshold in hydrogen gas with a KrF excimer laser at 248 nm is presented. The result shows a sharp increase of the threshold intensity at a few atmospheres of gas pressure when a focusing lens with a longer focal length is used. This enhancement is partially explained in terms of the influence of pump beam depletion in stimulated Raman scattering.
authors.forename: T
authors.initials: T
authors.lastname: Yagi
authors.forename: Y
authors.initials: Y
authors.lastname: Huo