1. Institute of Physical Chemistry and Abbe Center of Photonics, Friedrich Schiller University Jena, Helmholtzweg 4, 07743 Jena, Germany
2. Leibniz Institute of Photonic Technology (IPHT), Member of Leibniz Health Technology, Albert-Einstein-Straße 9, 07745 Jena, Germany
3. APE Angewandte Physik & Elektronik GmbH, Plauener Straße 163-165, 13053 Berlin, Germany
4. Department of Otorhinolaryngology, Jena University Hospital, Haus A, Am Klinikum 1, 07747 Jena, Germany