title: Upconversion: imaging with planar and spherical pump beams.
abstract: The imaging properties of nonlinear image upconverters with planar and spherical pump beams are discussed. We show the applicability of the fourier transform formalism and holographic analogy to the spherical pump beam case. Experimental results of upconversion with a spherical pump beam are presented and discussed.
authors.forename: A H
authors.initials: AH
authors.lastname: Firester