Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 62: Poster: Quantum Optics and Photonics V
Q 62.89: Poster
Donnerstag, 8. März 2018, 16:15–18:15, Redoutensaal
Towards high spatial resolution temperature sensing in an optical fiber amplifier — •Alexandra Popp1,2, Florian Sedlmeir1,2, Atiyeh Zarifi3, Birgit Stiller3, Christian R. Müller1,2, Ulrich Vogl1,2, Victor Bock4, Thomas Schreiber4, Benjamin J. Eggleton3, Andreas Tünnermann4, Christoph Marquardt1,2, and Gerd Leuchs1,2 — 1Max Planck Institute for the Science of Light, Erlangen, Germany. — 2Department of Physics, University of Erlangen-Nuremberg (FAU), Germany. — 3School of Physics, University of Sydney, Australia. — 4Fraunhofer Institute for Applied Optics and Precision Engineering IOF , Jena, Germany.
Extremely powerful lasers are required for various applications in science and industry. The output power of fiber lasers, however, has limits. When the light power inside a single-mode fiber amplifier reaches a certain threshold, the intensity profile out of the fiber starts to become distorted due to so called thermal mode instabilities (TMI) which are not yet fully understood and experimentally difficult to characterize. To investigate TMI, fast in-fiber temperature sensing with a high resolution is required. This has not been achieved yet. We present first measurements towards a setup for high precision in-fiber temperature measurements of an optical fiber amplifier based on Brillouin sensing.