Non-collinear generation of third harmonic of IR ultrashort laser pulses by PTR glass volume Bragg gratings.
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.
Siiman
Leo A
LA
CREOL/The College of Optics and Photonics, University of Central Florida P.O. Box 162700 Orlando, FL 32816-2700, USA. lsiiman@creol.ucf.edu
Lumeau
Julien
J
Canioni
Lionel
L
Glebov
Leonid B
LB