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Journal of Biomedical Optics • Open Access

All fiber optics circular-state swept source polarization-sensitive optical coherence tomography
Author(s): Hermann Lin; Meng-Chun Kao; Chih-Ming Lai; Jyun-Cin Huang; Wen-Chuan Kuo

Paper Abstract

A swept source (SS)-based circular-state (CS) polarization-sensitive optical coherence tomography (PS-OCT) constructed entirely with polarization-maintaining fiber optics components is proposed with the experimental verification. By means of the proposed calibration scheme, bulk quarter-wave plates can be replaced by fiber optics polarization controllers to, therefore, realize an all-fiber optics CS SSPS-OCT. We also present a numerical dispersion compensation method, which can not only enhance the axial resolution, but also improve the signal-to-noise ratio of the images. We demonstrate that this compact and portable CS SSPS-OCT system with an accuracy comparable to bulk optics systems requires less stringent lens alignment and can possibly serve as a technology to realize PS-OCT instrument for clinical applications (e.g., endoscopy). The largest deviations in the phase retardation (PR) and fast-axis (FA) angle due to sample probe in the linear scanning and a rotation angle smaller than 65 deg were of the same order as those in stationary probe setups. The influence of fiber bending on the measured PR and FA is also investigated. The largest deviations of the PR were 3.5 deg and the measured FA change by ∼12 to 21 deg. Finally, in vivo imaging of the human fingertip and nail was successfully demonstrated with a linear scanning probe.

Paper Details

Date Published: 1 October 2013
PDF: 10 pages
J. Biomed. Opt. 19(2) 021110 doi: 10.1117/1.JBO.19.2.021110
Published in: Journal of Biomedical Optics Volume 19, Issue 2
Show Author Affiliations
Hermann Lin, National Kaoshsiung Normal Univ. (Taiwan)
Meng-Chun Kao, National Yang-Ming Univ. (Taiwan)
Chih-Ming Lai, Ming-Chuan Univ. (Taiwan)
Jyun-Cin Huang, National Yang-Ming Univ. (Taiwan)
Wen-Chuan Kuo, National Yang-Ming Univ. (Taiwan)

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