Spatial differentiation of optical beams using phase-shifted Bragg grating

作者：Leonid L. Doskolovich, Dmitry A. Bykov, Evgeni A. Bezus, Victor A. Soifer · 发表于：Optics Letters · 年份：2014 · DOI：10.1364/ol.39.001278 · 被引用次数：132 · 研究领域：Photonic and Optical Devices、Optical Coatings and Gratings、Orbital Angular Momentum in Optics

We present a theoretical study of a new application of the phase-shifted Bragg grating (PSBG) as an optical spatial differentiator operating in reflection. We demonstrate that the PSBG allows to calculate the first-order spatial derivative at oblique incidence and the second-order derivative at normal incidence. As an example, the differentiator is numerically shown to be able to convert an input 2D Gaussian beam into a 2D Hermite-Gaussian mode. We expect the proposed application to be useful for all-optical data processing.