We propose a novel technique for measurements of Brillouin acoustic vibrations based on temporal tracking of back-reflected speckle patterns. The proposed method holds the potential to enhance some of the limiting factors in Brillouin frequency measurements while yielding increased spatial resolution and shorter scanning times of the inspected fiber. Experimental results show the capabilities of the proposed method are presented, using a two pump-waves configuration.
|Journal||Applied Sciences (Switzerland)|
|State||Published - 1 Jan 2020|
Bibliographical noteFunding Information:
This research was funded by the Erlangen Graduate School in Advanced Optical Technologies (SAOT) by the German Research Foundation (DFG) in the framework of the German excellence initiative.
© 2020 by the authors.
- Brillouin sensing
- Fiber sensors
- Speckle analysis