We propose a novel technique for arbitrary wavefront shaping in quadratic nonlinear crystals by introducing the concept of computer-generated holograms (CGHs) into the nonlinear optical regime. We demonstrate the method experimentally showing a conversion of a fundamental Gaussian beam pump light into the first three Hermite– Gaussian beams at the second harmonic in a stoichiometric lithium tantalate nonlinear crystal, and we characterize its efficiency dependence on the fundamental power and the crystal temperature. Nonlinear CGHs open new possibilities in the fields of nonlinear beam shaping, mode conversion, and beam steering.
© 2011 Optical Society of America
Original Manuscript: May 31, 2011
Manuscript Accepted: June 28, 2011
Published: August 1, 2011
Asia Shapira, Irit Juwiler, and Ady Arie, "Nonlinear computer-generated holograms," Opt. Lett. 36, 3015-3017 (2011)