title: Noncollinear double quasi phase matching in one-dimensional poled crystals.
abstract: We demonstrate simultaneous phase matching of two different nonlinear processes, using a noncollinear interaction in periodically poled crystal with single grating. The noncollinear scheme provides phase-matching solutions over continuous regions of the optical spectrum and can be used for multiple-harmonic generation as well as all-optical effects. We have demonstrated experimentally third-harmonic generation of a 3 microm pump wavelength in a noncollinear configuration using a periodically poled LiNbO3 crystal. We observed, in good agreement with theoretical calculation, very broad spectral and thermal acceptance bandwidths, as well as a relatively narrow angular bandwidth.
authors.affiliation: Department of Physical Electronics, Faculty of Engineering, Tel-Aviv University, Tel-Aviv 69978, Israel.
authors.forename: Tal
authors.initials: T
authors.lastname: Ellenbogen
authors.forename: Ady
authors.initials: A
authors.lastname: Arie
authors.forename: Solomon M
authors.initials: SM
authors.lastname: Saltiel