Here we present a protocol to build a rapid Brillouin spectrometer. Cascading virtually imaged phase array (VIPA) etalons achieve a measurement speed more than 1,000 times faster than traditional scanning Fabry-Perot spectrometers. This improvement provides the means for Brillouin analysis of tissue and biomaterials at low power levels in vivo.
Berghaus, K. V., Yun, S. H., Scarcelli, G. High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis. J. Vis. Exp. (106), e53468, doi:10.3791/53468 (2015).