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An all-fiber-optic combined system of noncontact photoacoustic tomography and optical coherence tomography

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Abstract
We propose an all-fiber-based dual-modal imaging system that combines noncontact photoacoustic tomography (PAT) and optical coherence tomography (OCT). The PAT remotely measures photoacoustic (PA) signals with a 1550-nm laser on the surface of a sample by utilizing a fiber interferometer as an ultrasound detector. The fiber-based OCT, employing a swept-source laser centered at 1310 nm, shares the sample arm of the PAT system. The fiber-optic probe for the combined system was homemade with a lensed single-mode fiber (SMF) and a large-core multimode fiber (MMF). The compact and robust common probe is capable of obtaining both the PA and the OCT signals at the same position without any physical contact. Additionally, the MMF of the probe delivers the short pulses of a Nd:YAG laser to efficiently excite the PA signals. We experimentally demonstrate the feasibility of the proposed dual-modal system with a phantom made of a fishing line and a black polyethylene terephthalate fiber in a tissue mimicking solution. The all-fiber-optic system, capable of providing complementary information about absorption and scattering, has a promising potential in minimally invasive and endoscopic imaging. © 2016 by the authors; licensee MDPI, Basel, Switzerland.
Author(s)
Eom, J.Shin, J.G.Park, S.Rim, SunghwanLee, Byeong Ha
Issued Date
2016-05
Type
Article
DOI
10.3390/s16050734
URI
https://scholar.gist.ac.kr/handle/local/14246
Publisher
Multidisciplinary Digital Publishing Institute (MDPI)
Citation
Sensors, v.16, no.5, pp.1 - 13
ISSN
1424-8220
Appears in Collections:
Department of Electrical Engineering and Computer Science > 1. Journal Articles
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