title: Four-wave sum mixing in beryllium around hydrogen Lyman-alpha.
abstract: Radiation was generated between 1210 and 1230 A by four-wave sum mixing in beryllium vapor where the 2s(2)(1)S-2s3d(1)D transition was two-photon resonant. Results indicate that beryllium will be an efficient nonlinear medium in this spectral region with improvements to the stability of the furnace to allow phase matching and operation at higher pressures.
authors.affiliation: Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20742, USA.
authors.forename: R
authors.initials: R
authors.lastname: Mahon
authors.forename: T J
authors.initials: TJ
authors.lastname: McIlrath
authors.forename: F S
authors.initials: FS
authors.lastname: Tomkins
authors.forename: D E
authors.initials: DE
authors.lastname: Kelleher