Towards swept-source mid-infrared OCT

S. Freer; D. G. Revin; K. Groom; S. J. Matcher

doi:10.1117/12.2306911

17 May 2018 Towards swept-source mid-infrared OCT

S. Freer, D. G. Revin, K. Groom, S. J. Matcher

Proceedings Volume 10685, Biophotonics: Photonic Solutions for Better Health Care VI; 106851W (2018) https://doi.org/10.1117/12.2306911
Event: SPIE Photonics Europe, 2018, Strasbourg, France

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.

Conference Presentation

Citation Download Citation

S. Freer, D. G. Revin, K. Groom, and S. J. Matcher "Towards swept-source mid-infrared OCT", Proc. SPIE 10685, Biophotonics: Photonic Solutions for Better Health Care VI, 106851W (17 May 2018); https://doi.org/10.1117/12.2306911

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