The Review of Laser Engineering
Online ISSN : 1349-6603
Print ISSN : 0387-0200
ISSN-L : 0387-0200
Laser Original
Optical Coherence Tomography with Spectral Interferometry and Analysis on Extraction of Spectroscopic Information
Ryouta FUJIOKAMasaya FUJITAMasayuki SUEKUNIFumihiko KANNARI
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2003 Volume 31 Issue 10 Pages 668-673

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Abstract
Optical coherence tomography (OCT) working in the Fourier frequency domain, rather than in the time domain, can provide a coherence function of light scattered from a bulk sample at one exposure without any mechanical scanning. In this study, frequency-domain OCT is implemented as a single-mode fiber interferometry technique and its performance is quantitatively studied. From complex coherence functions obtained by spectral interferometry, we obtained tomographic images for absorption and dispersion spectra as well as a conventional optical coherence tomography image. As a principle of short-time Fourier transform, the spatial resolution of a spectrogram is lower than the coherence length of a light source. Therefore, the interpretation of spectrograms is not always straightforward.
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© 2003 by The Laser Society of Japan
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