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Hansen AK, Andersen PE, Jensen OB, et al. Highly efficient single-pass sum frequency generation by cascaded nonlinear crystals. Opt Lett. 2015;40(23):5526-9doi: 10.1364/OL.40.005526.
Hansen, A. K., Andersen, P. E., Jensen, O. B., Sumpf, B., Erbert, G., & Petersen, P. M. (2015). Highly efficient single-pass sum frequency generation by cascaded nonlinear crystals. Optics letters, 40(23), 5526-9. https://doi.org/10.1364/OL.40.005526
Hansen, Anders K, et al. "Highly efficient single-pass sum frequency generation by cascaded nonlinear crystals." Optics letters vol. 40,23 (2015): 5526-9. doi: https://doi.org/10.1364/OL.40.005526
Hansen AK, Andersen PE, Jensen OB, Sumpf B, Erbert G, Petersen PM. Highly efficient single-pass sum frequency generation by cascaded nonlinear crystals. Opt Lett. 2015 Dec 01;40(23):5526-9. doi: 10.1364/OL.40.005526. PMID: 26625042.
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Opt Lett. 2015 Dec 01;40(23):5526-9. doi: 10.1364/OL.40.005526.

Highly efficient single-pass sum frequency generation by cascaded nonlinear crystals.

Optics letters

Anders K Hansen, Peter E Andersen, Ole B Jensen, Bernd Sumpf, Götz Erbert, Paul M Petersen

PMID: 26625042 DOI: 10.1364/OL.40.005526

Abstract

The cascading of nonlinear crystals has been established as a simple method to greatly increase the conversion efficiency of single-pass second-harmonic generation compared to a single-crystal scheme. Here, we show for the first time that the technique can be extended to sum frequency generation, despite differences in the phase relations of the involved fields. An unprecedented 5.5 W of continuous-wave diffraction-limited green light is generated from the single-pass sum frequency mixing of two diode lasers in two periodically poled nonlinear crystals (conversion efficiency 50%). The technique is generally applicable and can be applied to any combination of fundamental wavelengths and nonlinear crystals.

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