Abstract

We report the first experiment, to our knowledge, of type II phase-matching SHG at 1.32 pm in KTiOAsO₄ (KTA) [1,2]. The phase-matching directions are measured in an orientated sphere of the studied crystal placed at the center of an Euler circle and illuminated by the focused beam at the fundamental wavelength [3]. The KTA and KTP crystals which we study are grown using a flux of alkali metal halide [4]. The crystals are cut in a sphere with a diameter of 2.45 mm for KTA and 5.12 mm for KTP. The spherical coordinates (θ, ϕ) of the phase-matching directions measured are given in figure 1.

© 1993 Optical Society of America