Controlled Generation of Self-images of a Microlens Array and the Second Harmonic Talbot Effect

Abstract

Here, we report on a simple experimental scheme to demonstrate the second harmonic (SH) Talbot effect. Using a dielectric Microlens array (MLA) as an array illuminator at 1064 nm on to a 1.2 mm thick BiBO crystal, we have observed the SH Talbot effect in green at 532 nm. Furthermore, we have shown a simple control scheme to tune the Talbot lengths of the self-images in both pump and SH. This generic experimental scheme can be used to generate long range self-images of periodic structures, and can be used to program desired Talbot planes, at predetermined positions.