Miniaturized photogenerated electro-optic axicon lens Gaussian-to-Bessel beam conversion

摘要

We experimentally demonstrate an electro-optic Gaussian-to-Bessel beam-converter miniaturized down to a 30 x 30 mu m pixel in a potassium-lithium-tantalate-niobate (KLTN) paraelectric crystal. The converter is based on the electro-optic activation of a photoinduced and reconfigurable volume axicon lens achieved using a prewritten photorefractive funnel space-charge distribution. The transmitted light beam has a tunable depth of field that can be more than twice that of a conventional beam with the added feature of being selfhealing. (C) 2017 Optical Society of America