title: Spatial asymmetry of optical parametric fluorescence with a divergent pump beam and potential applications.
abstract: The spatial distribution of the optical parametric fluorescence generated in a negative uniaxial nonlinear crystal is asymmetric with respect to the pump when the pump beam has a slight divergence angle. The formation mechanism of this phenomenon and the influence of parameters were analyzed and discussed from a theoretical standpoint. Moreover, two potential applications of this phenomenon were experimentally demonstrated, showing the temporal contrast improvement of ultra-intense lasers and the intensity enhancement of special light sources induced by the optical parametric generation.
authors.forename: Zhaoyang
authors.initials: Z
authors.lastname: Li
authors.forename: Koji
authors.initials: K
authors.lastname: Tsubakimoto
authors.forename: Hidetsugu
authors.initials: H
authors.lastname: Yoshida
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Uesu
authors.forename: Koichi
authors.initials: K
authors.lastname: Tsuji
authors.forename: Noriaki
authors.initials: N
authors.lastname: Miyanaga