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19 June 2013 Self-spectral calibration for spectral domain optical coherence tomography
Xianling Zhang, Wanrong Gao, Haiyi Bian, Chaoliang Chen, Jiuling Liao
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Optical Engineering, Vol. 52, Issue 6, 063603 (June 2013). https://doi.org/10.1117/1.OE.52.6.063603
Abstract
A different real-time self-wavelength calibration method for spectral domain optical coherence tomography is presented in which interference spectra measured from two arbitrary points on the tissue surface are used for calibration. The method takes advantages of two favorable conditions of optical coherence tomography (OCT) signal. First, the signal back-scattered from the tissue surface is generally much stronger than that from positions in the tissue interior, so the spectral component of the surface interference could be extracted from the measured spectrum. Second, the tissue surface is not a plane and a phase difference exists between the light reflected from two different points on the surface. Compared with the zero-crossing automatic method, the introduced method has the advantage of removing the error due to dispersion mismatch or the common phase error. The method is tested experimentally to demonstrate the improved signal-to-noise ratio, higher axial resolution, and slower sensitivity degradation with depth when compared to the use of the zero-crossing method and applied to two-dimensional cross-sectional images of human finger skin.
CC BY: © The Authors. Published by SPIE under a Creative Commons Attribution 4.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
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Xianling Zhang, Wanrong Gao, Haiyi Bian, Chaoliang Chen, and Jiuling Liao "Self-spectral calibration for spectral domain optical coherence tomography," Optical Engineering 52(6), 063603 (19 June 2013). https://doi.org/10.1117/1.OE.52.6.063603
Published: 19 June 2013
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Cited by 6 scholarly publications.
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KEYWORDS
Calibration
Spectral calibration
Natural surfaces
Optical coherence tomography
Signal to noise ratio
Charge-coupled devices
Tissue optics
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