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Ultrahigh-Resolution Spectroscopy Based on the Bandwidth Reduction of Stimulated Brillouin Scattering

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4 Author(s)
Stefan Preussler ; Institut für Hochfrequenztechnik, Hochschule für Telekommunikation Leipzig, Leipzig, Germany ; Andrzej Wiatrek ; Kambiz Jamshidi ; Thomas Schneider

We present a method for ultrahigh-resolution optical spectroscopy based on stimulated Brillouin scattering (SBS). The resolution of conventional spectrometers is limited by the natural bandwidth of the SBS. We enhance the resolution by a reduction of the natural SBS gain bandwidth. By a superposition of the natural gain with two losses, we were able to increase the spectrometer resolution from 20 to 8 MHz. We will confirm this in a first proof of concept experiment.

Published in:

IEEE Photonics Technology Letters  (Volume:23 ,  Issue: 16 )