Simultaneous measurement of refractive index and thickness of multilayer systems using Fourier domain optical coherence tomography, part 1: theory

We introduce a theoretical framework for simultaneous refractive index and thickness measurement of multilayer systems using the Fourier domain optical coherence tomography (FD-OCT) system without any previous information about the item under investigation. The input data to the new formalism are th...

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Bibliographic Details
Published in:Journal of biomedical optics 2017-01, Vol.22 (1), p.015002-015002
Main Authors: Rajai, Payman, Schriemer, Henry, Amjadi, Ahmad, Munger, Rejean
Format: Article
Language:English
Subjects:
Fourier Analysis
Refractometry
Tomography, Optical Coherence
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Summary:We introduce a theoretical framework for simultaneous refractive index and thickness measurement of multilayer systems using the Fourier domain optical coherence tomography (FD-OCT) system without any previous information about the item under investigation. The input data to the new formalism are the FD-OCT measured optical path lengths and properly selected spectral components of the FD-OCT interference spectrum. No additional arrangement, reference reflector, or mechanical scanning is needed in this approach. Simulation results show that the accuracy of the extracted parameters depends on the index contrast of the sample while it is insensitive to the sample's thickness profile. For transparent biological samples with smooth interfaces, when the object is in an aqueous medium and has indices
ISSN:1083-3668
1560-2281
DOI:10.1117/1.JBO.22.1.015002