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arXiv · 2106.00067

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

Niels M. Israelsen·Peter John Rodrigo·Christian R. Petersen·Getinet Woyessa·Rasmus E. Hansen·Peter Tidemand-Lichtenberg·Christian Pedersen·Ole Bang
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Abstract

We report on Mid-infrared (MIR) OCT at 4 $\mu$m 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 $\mu$m, and one providing a record axial resolution of 5.8 $\mu$m. Image performance is evaluated by sub-surface micro-mapping of a plastic glove and real-time monitoring of CO$_2$ in parallel with OCT imaging.

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Niels M. Israelsen, Peter John Rodrigo, Christian R. Petersen, Getinet Woyessa, Rasmus E. Hansen, Peter Tidemand-Lichtenberg, Christian Pedersen, Ole Bang. 2021-05-31. High resolution mid-infrared optical coherence tomography with kHz line rate. https://doi.org/10.1364/ol.432765

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