SAMOP 2023 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 45: Photonics III
Q 45.5: Vortrag
Donnerstag, 9. März 2023, 12:00–12:15, A320
Thermodynamic control of stimulated Brillouin-Mandelstam scattering in liquid-core optical fiber — •Andreas Geilen1,2, Alexandra Popp1,2, Debayan Das1,3, Saher Junaid4,5, Christopher G. Poulton6, Mario Chemnitz7, Christoph Marquardt1,2, Markus A. Schmidt4,5, and Birgit Stiller1,2 — 1Max Planck Institute for the Science of Light, 91058 Erlangen, Germany — 2Department of Physics, University of Erlangen-Nuremberg, 91058 Erlangen, Germany — 3Université Bourgogne Franche-Comté, 25030 Besançon, France — 4Leibniz Institute of Photonic Technology, 07745 Jena, Germany — 5Otto Schott Institute of Materials Research, 07743 Jena, Germany — 6School of Mathematical and Physical Sciences, University of Technology, Sydney, NSW 2007, Australia — 7Centre Énergie Matériaux Télécommunications, Québec, J3X 1S2, Canada
We present temperature and pressure dependent Brillouin-Mandelstam scattering measurements inside a fully sealed, CS2-filled liquid-core optical fiber. The confinement of the liquid inside the micrometer-size silica capillary allows us to control and investigate the thermodynamic behavior. Tuning the temperature from 5 ∘C to 135 ∘C we reach high pressure values above 1000 bar as well as substantial absolute negative pressure values below -300 bar. With this, the Brillouin frequency shift (BFS) can be tuned by 40%. Our platform offers a rich source for fundamental optoacoustic investigation of liquids in different thermodynamic states, maintaining all-fiber convenience, while the low BFS (≈2.5 GHz) and a high temperature sensitivity of 7 MHz/∘C are promising for sensing applications.