Amitonova Lyubov V, Descloux Adrien, Petschulat Joerg, Frosz Michael H, Ahmed Goran, Babic Fehim, Jiang Xin, Mosk Allard P, Russell Philip St J, Pinkse Pepijn W H
Opt Lett. 2016 Feb 1;41(3):497-500. doi: 10.1364/OL.41.000497.
We demonstrate that a high-numerical-aperture photonic crystal fiber allows lensless focusing at an unparalleled resolution by complex wavefront shaping. This paves the way toward high-resolution imaging exceeding the capabilities of imaging with multi-core single-mode optical fibers. We analyze the beam waist and power in the focal spot on the fiber output using different types of fibers and different wavefront shaping approaches. We show that the complex wavefront shaping technique, together with a properly designed multimode photonic crystal fiber, enables us to create a tightly focused spot on the desired position on the fiber output facet with a subwavelength beam waist.
我们证明，高数值孔径光子晶体光纤通过复杂波前整形能够实现无与伦比的无透镜聚焦分辨率。这为实现超越多芯单模光纤成像能力的高分辨率成像铺平了道路。我们使用不同类型的光纤和不同的波前整形方法，分析了光纤输出端焦斑处的束腰和功率。我们表明，复杂波前整形技术与精心设计的多模光子晶体光纤相结合，使我们能够在光纤输出端面上的所需位置创建一个具有亚波长束腰的紧密聚焦光斑。
