School of Engineering, École Polytechnique Fédéral de Lausanne, Lausanne, Switzerland.
Opt Lett. 2013 Aug 1;38(15):2776-8. doi: 10.1364/OL.38.002776.
We present a design that exploits the focusing properties of scattering media to increase the resolution and the working distance of multimode fiber (MMF)-based imaging devices. Placing a highly scattering medium in front of the distal tip of the MMF enables the formation of smaller sized foci at increased working distances away from the fiber tip. We perform a parametric study of the effect of the working distance and the separation between the fiber and the scattering medium on the focus size. We experimentally demonstrate submicrometer focused spots as far away as 800 μm with 532 nm light.
我们提出了一种设计，利用散射介质的聚焦特性来提高基于多模光纤（MMF）的成像设备的分辨率和工作距离。在 MMF 的远端尖端前放置一个高散射介质，可以在远离光纤尖端的更大工作距离处形成更小尺寸的焦点。我们对工作距离和光纤与散射介质之间的距离对焦点大小的影响进行了参数研究。我们使用 532nm 光实验证明了远至 800μm 处的亚微米聚焦光斑。
