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arXiv · 1702.05348

Influence of multi-line CO laser focusing on broadband sum-frequency generation in ZnGeP2

A. A. Ionin·I. O. Kinyaevskiy·Yu. M. Klimachev·A. A. Kotkov·L. V. Seleznev
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Abstract

An influence of multi-line CO laser focusing on spectral characteristics of broadband sum-frequency generation in ZnGeP2 nonlinear crystal was experimentally and numerically studied. Maximal frequency conversion was experimentally observed under tight focusing of the multi-line rather than single-line CO laser. The tight focusing resulted in broadening sum-frequency generation spectrum and increasing total, i.e. integrated over the spectrum, frequency conversion efficiency. These effects were due to increasing phase-matching bandwidth and angular dispersion. Maximal conversion efficiency of the multi-line CO laser was numerically demonstrated to take place at the focal length of 0.4 times that for the single-line one.

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A. A. Ionin, I. O. Kinyaevskiy, Yu. M. Klimachev, A. A. Kotkov, L. V. Seleznev. 2017-02-14. Influence of multi-line CO laser focusing on broadband sum-frequency generation in ZnGeP2. https://doi.org/10.1088/1612-202x%2Faa6b1e

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