Time-encoded mid-infrared Fourier-domain optical coherence tomography
Abstract
We report on a technically simple approach to achieve high-resolution and high-sensitivity Fourier-domain OCT imaging in the mid-infrared range. The proposed OCT system employs an InF3 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 um. 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 um wavelength) mid-IR supercontinuum source.
Keywords
Cite
@article{arxiv.2105.04882,
title = {Time-encoded mid-infrared Fourier-domain optical coherence tomography},
author = {Ivan Zorin and Paul Gattinger and Andrii Prylepa and Bettina Heise},
journal= {arXiv preprint arXiv:2105.04882},
year = {2021}
}
Comments
6 pages, 5 figures