title: Phase matching considerations for generalized three-wave mixing in nonlinear anisotropic crystals.
abstract: Phase matching in anisotropic second-order nonlinear optical crystals is studied. All the possible phase matching configurations and existence conditions for general collinear three-wave mixing interactions are derived for propagation within the crystal principal planes. Closed form expressions for the critical phase matching angles are given wherever possible.
authors.forename: R A
authors.initials: RA
authors.lastname: Morgan