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

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4 Author(s)
Preussler, S. ; Inst. fur Hochfrequenztech., Hochschule fur Telekommunikation Leipzig, Leipzig, Germany ; Wiatrek, A. ; Jamshidi, K. ; Schneider, T.

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:

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