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Proceedings Paper

Towards swept-source mid-infrared OCT
Author(s): S. Freer; D. G. Revin; K. Groom; S. J. Matcher
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Paper Abstract

A swept-source optical coherence tomography (OCT) system is demonstrated in the mid-infrared region. A Michelson interferometric setup is illuminated by an external cavity quantum cascade laser (QCL), with a scanning frequency of 1 Hz. A-scans were collected using three different samples: a mirror, CaF2 coated with germanium on both of its surfaces, and CaF2 coated with germanium on the back side of the sample. These depth-profiles were used to mimic a tissue sample with multiple reflective boundaries. Fourier transformation of these interference fringes clearly showed the expected depths of reflection, allowing for the signal to noise ratio of the system to be determined.

Paper Details

Date Published: 17 May 2018
PDF: 10 pages
Proc. SPIE 10685, Biophotonics: Photonic Solutions for Better Health Care VI, 106851W (17 May 2018); doi: 10.1117/12.2306911
Show Author Affiliations
S. Freer, The Univ. of Sheffield (United Kingdom)
D. G. Revin, The Univ. of Sheffield (United Kingdom)
K. Groom, The Univ. of Sheffield (United Kingdom)
S. J. Matcher, The Univ. of Sheffield (United Kingdom)


Published in SPIE Proceedings Vol. 10685:
Biophotonics: Photonic Solutions for Better Health Care VI
Jürgen Popp; Valery V. Tuchin; Francesco Saverio Pavone, Editor(s)

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