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arXiv · 1805.11146

Computational coherent averaging for free-running dual-comb spectroscopy

Lukasz A. Sterczewski·Jonas Westberg·Gerard Wysocki
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Abstract

Dual-comb spectroscopy is a rapidly developing technique that enables moving parts-free, simultaneously broadband and high-resolution measurements with microseconds of acquisition time. However, for high sensitivity measurements and extended duration of operation, a coherent averaging procedure is essential. To date, most coherent averaging schemes require additional electro-optical components, which increase system complexity and cost. Instead, we propose an all-computational solution that is compatible with real-time architectures and allows for coherent averaging of spectra generated by free-running systems. The efficacy of the computational correction algorithm is demonstrated using spectra acquired with a THz quantum cascade laser-based dual-comb spectrometer.

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Lukasz A. Sterczewski, Jonas Westberg, Gerard Wysocki. 2018-05-21. Computational coherent averaging for free-running dual-comb spectroscopy. https://doi.org/10.1364/oe.27.023875

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