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Time-encoded mid-infrared Fourier-domain optical coherence tomography

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Abstract

We report on a technically simple approach to achieve high-resolution and high-sensitivity Fourier-domain optical coherence tomography (OCT) imaging in the mid-infrared (mid-IR) range. The proposed OCT system employs an ${{\rm InF}_3}$ supercontinuum source. A specially designed dispersive scanning spectrometer based on a single InAsSb point detector is employed for detection. The spectrometer enables structural OCT imaging in the spectral range from 3140 nm to 4190 nm with a characteristic sensitivity of over 80 dB and an axial resolution below $8\,\,{\unicode{x00B5}{\rm m}}$. The capabilities of the system are demonstrated for imaging of porous ceramic samples and transition-stage green parts fabricated using an emerging method of lithography-based ceramic manufacturing. Additionally, we demonstrate the performance and flexibility of the system by OCT imaging using an inexpensive low-power (average power of 16 mW above $3\,\,{\unicode{x00B5}{\rm m}}$ wavelength) mid-IR supercontinuum source.

© 2021 Optical Society of America

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Corrections

Ivan Zorin, Paul Gattinger, Andrii Prylepa, and Bettina Heise, "Time-encoded mid-infrared Fourier-domain optical coherence tomography: erratum," Opt. Lett. 46, 5541-5541 (2021)
https://opg.optica.org/ol/abstract.cfm?uri=ol-46-22-5541

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Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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