| Autor: |
Potts, A. M., Mai, T. T., Warren, M. T., Valdés Aguilar, R. |
| Zdroj: |
Journal of the Optical Society of America B: Optical Physics; April 2019, Vol. 36 Issue: 4 p1037-1043, 7p |
| Abstrakt: |
Time-domain terahertz spectroscopy typically uses mechanical delay stages that inherently suffer from non-uniform sampling positions. We review, simulate, and experimentally test, as a proof of principle, the ability of corrective cubic spline and Shannon re-gridding algorithms to mitigate the inherent sampling position noise. We experimentally confirm that sampling position uncertainty is not a leading source error in a modern time-domain terahertz spectrometer. Though modern systems are presently limited by other noise sources, our simulations and data suggest that re-gridding is an effective technique to improve the signal-to-noise ratio of a system limited by sampling position within the frequency range of 100 GHz to 2 THz. We also predict that re-gridding corrections will become increasingly important to both spectroscopy and imaging as THz technology continues to improve and higher frequencies become experimentally accessible. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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