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Keeley J, Dean P, Valavanis A, et al. Three-dimensional terahertz imaging using swept-frequency feedback interferometry with a quantum cascade laser. Opt Lett. 2015;40(6):994-7doi: 10.1364/OL.40.000994.
Keeley, J., Dean, P., Valavanis, A., Bertling, K., Lim, Y. L., Alhathlool, R., Taimre, T., Li, L. H., Indjin, D., Rakić, A. D., Linfield, E. H., & Davies, A. G. (2015). Three-dimensional terahertz imaging using swept-frequency feedback interferometry with a quantum cascade laser. Optics letters, 40(6), 994-7. https://doi.org/10.1364/OL.40.000994
Keeley, J, et al. "Three-dimensional terahertz imaging using swept-frequency feedback interferometry with a quantum cascade laser." Optics letters vol. 40,6 (2015): 994-7. doi: https://doi.org/10.1364/OL.40.000994
Keeley J, Dean P, Valavanis A, Bertling K, Lim YL, Alhathlool R, Taimre T, Li LH, Indjin D, Rakić AD, Linfield EH, Davies AG. Three-dimensional terahertz imaging using swept-frequency feedback interferometry with a quantum cascade laser. Opt Lett. 2015 Mar 15;40(6):994-7. doi: 10.1364/OL.40.000994. PMID: 25768165.
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Opt Lett. 2015 Mar 15;40(6):994-7. doi: 10.1364/OL.40.000994.

Three-dimensional terahertz imaging using swept-frequency feedback interferometry with a quantum cascade laser.

Optics letters

J Keeley, P Dean, A Valavanis, K Bertling, Y L Lim, R Alhathlool, T Taimre, L H Li, D Indjin, A D Rakić, E H Linfield, A G Davies

PMID: 25768165 DOI: 10.1364/OL.40.000994

Abstract

We demonstrate coherent three-dimensional terahertz imaging by frequency modulation of a quantum cascade laser in a compact and experimentally simple self-mixing scheme. Through this approach, we can realize significantly faster acquisition rates compared to previous schemes employing longitudinal mechanical scanning of a sample. We achieve a depth resolution of better than 0.1 μm with a power noise spectral density below -50  dB/Hz, for a sampling time of 10  ms/pixel.

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