title: Non-collinear generation of third harmonic of IR ultrashort laser pulses by PTR glass volume Bragg gratings.
abstract: Three conditions for non-collinear third harmonic generation by a PTR glass volume Bragg grating are demonstrated using infrared ultrashort pulse illumination. Each condition corresponds to a different angle of grating orientation and a separate generation mechanism. We identify the mechanisms as corresponding to sum-frequency generation, Bragg diffraction of 3 omega, and a non-resonant Bragg condition involving three omega photons interacting with a nonlinear grating vector. Theoretical modeling is performed using wave vector additions and the results are compared to experimental measurements.
authors.affiliation: CREOL/The College of Optics and Photonics, University of Central Florida P.O. Box 162700 Orlando, FL 32816-2700, USA. lsiiman@creol.ucf.edu
authors.forename: Leo A
authors.initials: LA
authors.lastname: Siiman
authors.forename: Julien
authors.initials: J
authors.lastname: Lumeau
authors.forename: Lionel
authors.initials: L
authors.lastname: Canioni
authors.forename: Leonid B
authors.initials: LB
authors.lastname: Glebov