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Optical Engineering • Open Access

Simultaneously measuring the refractive index and thickness of an optical sample by using improved fiber-based optical coherence tomography
Author(s): Chih-Ta Yen; Jen-Fa Huang; Ming-Jia Wu; Yu-Fan Lee; Chia-Tsai Huang; Shu-Fan Huang; Hsu-Chih Cheng

Paper Abstract

An improved structure for the optical coherence tomography (OCT) scheme based on a 4×4 fiber coupler for simultaneously measuring the refractive index and thickness of optical samples is presented. The proposed structure incorporates the optical path length difference of interference light and is used to calculate the refractive index and thickness of an unknown sample without any prior knowledge of the sample parameters. Two methods (time-domain and Fourier-domain OCT) of obtaining information about an unknown sample are proposed, and a high-speed high-resolution OCT system was developed.

Paper Details

Date Published: 11 April 2014
PDF: 7 pages
Opt. Eng. 53(4) 044108 doi: 10.1117/1.OE.53.4.044108
Published in: Optical Engineering Volume 53, Issue 4
Show Author Affiliations
Chih-Ta Yen, National Formosa Univ. (Taiwan)
Jen-Fa Huang, National Cheng Kung Univ. (Taiwan)
Ming-Jia Wu, National Formosa Univ. (Taiwan)
Yu-Fan Lee, National Formosa Univ. (Taiwan)
Chia-Tsai Huang, National Cheng Kung Univ. (Taiwan)
Shu-Fan Huang, National Cheng Kung Univ. (Taiwan)
Hsu-Chih Cheng, National Formosa Univ. (Taiwan)


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