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Lensed fiber probes designed as an alternative to bulk probes in optical coherence tomography

机译:透镜光纤探头可替代光学相干断层扫描中的体探头

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摘要

We demonstrate a compact all-fiber sampling probe for an optical coherence tomography (OCT) system. By forming a focusing lens directly on the tip of an optical fiber, a compact sampling probe could be implemented. To simultaneously achieve a sufficiently long working distance and a good lateral resolution, we employed a large-mode area photonic crystal fiber (PCF) and a coreless silica fiber (CSF) of the same diameters. A working distance of up to 1270 mu m, a 3 dB distance range of 2210 mu m, and a transverse resolution of 14.2 mu m were achieved with the implemented PCF lensed fiber; these values are comparable to those obtainable with a conventional objective lens having an NA of 0.25 (10 x). The performance of the OCT system equipped with the proposed PCF lensed fiber is presented by showing the OCT images of a rat finger as a biological sample and a pearl as an in-depth sample. (C) 2008 Optical Society of America.
机译:我们展示了一种用于光学相干断层扫描(OCT)系统的紧凑型全光纤采样探头。通过将聚焦透镜直接形成在光纤尖端上,可以实现紧凑的采样探针。为了同时获得足够长的工作距离和良好的横向分辨率,我们使用了具有相同直径的大模面积光子晶体光纤(PCF)和无芯石英纤维(CSF)。使用已实现的PCF透镜光纤,工作距离可达1270μm,3 dB距离范围为2210μm,横向分辨率为14.2μm。这些值可与NA为0.25(10 x)的常规物镜获得的值相比。通过显示作为生物样本的大鼠手指和作为深度样本的珍珠的OCT图像,可以展示配备有建议的PCF透镜光纤的OCT系统的性能。 (C)2008年美国眼镜学会。

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