Ultrathin fiber probes with extended depth of focus for optical coherence tomography

被引：63
作者：
Lorenser, Dirk [1 ]
Yang, Xiaojie [1 ]
Sampson, David D. [1 ,2 ]
机构：
[1] Univ Western Australia, Sch Elect Elect & Comp Engn, Opt Biomed Engn Lab, Nedlands, WA 6009, Australia
[2] Univ Western Australia, Ctr Microscopy Characterisat & Anal, Nedlands, WA 6009, Australia
来源：
OPTICS LETTERS | 2012年 / 37卷 / 10期
关键词：
MICROSCOPY; NEEDLE;
D O I：
10.1364/OL.37.001616
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We report on a novel scheme for extending the depth of focus (DOF) of ultrathin (125 mu m diameter) fiber probes for optical coherence tomography (OCT) using a simple phase mask consisting of graded-index (GRIN) fiber. The technique is compatible with existing all-in-fiber probe fabrication techniques, and our simulations show that it can provide a DOF gain of similar to 2 at a modest similar to 5 dB reduction of peak sensitivity. In a prototype device using commercially available GRIN fiber, a DOF gain of 1.55 is obtained, validated by beam profiling and OCT imaging. (C) 2012 Optical Society of America
引用
收藏
页码：1616 / 1618
页数：3
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