Generation of infrared photon pairs by spontaneous four-wave mixing in a CS2-filled microstructured optical fiber

Mina Afsharnia; Saher Junaid; Sina Saravi; Mario Chemnitz; Katrin Wondraczek; Thomas Pertsch; Markus A Schmidt; Frank Setzpfandt

doi:10.1038/s41598-024-51482-0

Generation of infrared photon pairs by spontaneous four-wave mixing in a CS₂-filled microstructured optical fiber

Sci Rep. 2024 Jan 10;14(1):977. doi: 10.1038/s41598-024-51482-0.

Authors

Mina Afsharnia¹, Saher Junaid², Sina Saravi³, Mario Chemnitz², Katrin Wondraczek², Thomas Pertsch^{3

4}, Markus A Schmidt^{2

5

6}, Frank Setzpfandt^{3

4}

Affiliations

¹ Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Straße 15, 07745, Jena, Germany. mina.afsharnia@uni-jena.de.
² Leibniz Institute of Photonic Technology, Albert-Einstein-Street 9, 07745, Jena, Germany.
³ Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Straße 15, 07745, Jena, Germany.
⁴ Fraunhofer Institute for Applied Optics and Precision Engineering IOF, Albert-Einstein-Str. 7, 07745, Jena, Germany.
⁵ Abbe Center of Photonics and Faculty of Physics, Friedrich-Schiller-University Jena, Max-Wien-Platz 1, 07743, Jena, Germany.
⁶ Otto Schott Institute of Materials Research, Friedrich Schiller University Jena, Fraunhoferstr. 6, 07743, Jena, Germany.

Abstract

We experimentally demonstrate frequency non-degenerate photon-pair generation via spontaneous four-wave mixing from a novel CS₂-filled microstructured optical fiber. CS₂ has high nonlinearity, narrow Raman lines, a broad transmission spectrum, and also has a large index contrast with the microstructured silica fiber. We can achieve phase matching over a large spectral range by tuning the pump wavelength, allowing the generation of idler photons in the infrared region, which is suitable for applications in quantum spectroscopy. Moreover, we demonstrate a coincidence-to-accidental ratio of larger than 90 and a pair generation efficiency of about [Formula: see text] per pump pulse, which shows the viability of this fiber-based platform as a photon-pair source for quantum technology applications.