Open AccessNon-collinear generation of third harmonic of IR ultrashort laser pulses by PTR glass volume Bragg gratings
Author(s) -
Leo A. Siiman,
Julien Lumeau,
Lionel Canioni,
Leonid Glebov
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.003564
Subject(s) - optics , fiber bragg grating , grating , bragg's law , high harmonic generation , laser , materials science , second harmonic generation , ultrashort pulse , nonlinear optics , diffraction grating , diffraction , physics
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.