High resolution mid-infrared optical coherence tomography with kHz line rate

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Abstract

We report on Mid-infrared (MIR) OCT at 4 µm based on collinear sum-frequency upconversion and promote the A-scan scan rate to 3 kHz. We demonstrate the increased imaging speed for two spectral realizations, one providing an axial resolution of 8.6 µm, and one providing a record axial resolution of 5.8 µm. Image performance is evaluated by sub-surface micro-mapping of a plastic glove and real-time monitoring of CO2 in parallel with OCT imaging.
Original languageEnglish
JournalOptics Letters
Volume46
Issue number18
Pages (from-to)4558-4561
ISSN0146-9592
DOIs
Publication statusPublished - 2021

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