Miniature all-fiber axicon probe with extended Bessel focus for optical coherence tomography

被引：31

作者：

Wang, Wei ^{[1
]}

Wang, Guangying ^{[1
]}

Ma, Jun ^{[1
]}

Cheng, Linghao ^{[1
]}

Guan, Bai-Ou ^{[1
]}

机构：

[1] Jinan Univ, Inst Photon Technol, Guangdong Prov Key Lab Opt Fiber Sensing & Commun, Guangzhou 510632, Guangdong, Peoples R China

来源：

OPTICS EXPRESS | 2019年 / 27卷 / 02期

基金：

中国国家自然科学基金;

关键词：

DEPTH; GENERATION; NEEDLE; FILTER;

D O I：

10.1364/OE.27.000358

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The trade-off between lateral resolution and depth of focus (DOF) severely limits the capability of endoscopic optical coherence tomography (OCT) for high-resolution deep-tissue imaging. To address this issue, we developed a novel miniature all-fiber axicon OCT probe by inserting a segment of gradient-index (GRIN) fiber between a piece of single-mode fiber (SMF) and an axicon polished from a no-core fiber. The GRIN lens served as a beam expander extending the probe DOF by 5.2 times while maintaining a high lateral resolution of 2 mu m. The DOF extension was experimentally verified by measuring the axial profile of the probe output beam and further by imaging multilayered polymer tapes and onion samples. The designed probe with a tight focus over a large DOF holds great potential in endoscopic OCT imaging of deep tissues at the cellular level. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

引用

页码：358 / 366

页数：9

共 35 条

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