Di Domenico G, Parravicini J, Antonacci G, Silvestri S, Agranat A J, DelRe E
Appl Opt. 2017 Apr 1;56(10):2908-2911. doi: 10.1364/AO.56.002908.
We experimentally demonstrate an electro-optic Gaussian-to-Bessel beam-converter miniaturized down to a 30×30 μm 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 self-healing.
我们通过实验证明了一种电光高斯光束到贝塞尔光束转换器，该转换器在钽酸锂钾铌（KLTN）铁电晶体中被小型化至30×30μm像素。该转换器基于利用预先写入的光折变漏斗空间电荷分布实现的光致可重构体轴棱锥透镜的电光激活。透射光束具有可调景深，其景深可比传统光束的景深大一倍多，并且具有自愈特性。
