Extending the depth of focus of fiber-optic optical coherence tomography using a chromatic dual-focus design

被引：9

作者：

Li, Jinhan ^{[1
]}

Luo, Yuemei ^{[1
]}

Wang, Xianghong ^{[1
]}

Wang, Nanshuo ^{[1
]}

Bo, En ^{[1
]}

Chen, Si ^{[1
]}

Chen, Shufen ^{[1
]}

Chen, Shi ^{[1
]}

Tsai, Meng-Tsan ^{[3
,4
]}

Liu, Linbo ^{[1
,2
]}

机构：

[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 639798, Singapore

[2] Nanyang Technol Univ, Sch Chem & Biomed Engn, Singapore 637459, Singapore

[3] Chang Gung Univ, Dept Elect Engn, Taoyuan 33302, Taiwan

[4] Chang Gung Mem Hosp, Dept Dermatol, Linkou 33305, Taiwan

来源：

APPLIED OPTICS | 2018年 / 57卷 / 21期

基金：

新加坡国家研究基金会; 英国医学研究理事会; 中国国家自然科学基金;

关键词：

IN-VIVO; SYNTHETIC-APERTURE; EXTENSION; MICROSCOPY; FILTERS; PROBE; BEAM;

D O I：

10.1364/AO.57.006040

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report a dual-focus fiber-optic probe designed to extend depth of focus (DOF) in high-resolution endoscopic optical coherence tomography. We exploited the broad spectral bandwidth of a supercontinuum source and, in the fiber probe, the foci of the 750-1000 nm and 1100-1450 nm inputs were axially chromatically shifted. The interference signals from the two spectral bands were measured with a Si camera-based spectrometer and an InGaAs camera-based spectrometer, respectively. We verified the feasibility of the design using a phantom composed of microparticles and swine small intestine tissue ex vivo. The results showed that a transverse resolution below 5 mu m over 300 mu m could be maintained, and that the extended DOF was 2 times larger than that of the single focus probe via the use of dual spectral band inputs and a chromatic focal shift. (C) 2018 Optical Society of America

引用

页码：6040 / 6046

页数：7

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