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Eliminating the broadening by finite aperture in Brillouin spectroscopy

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 Added by Benoit Ruffl\\'e
 Publication date 2011
  fields Physics
and research's language is English




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We present a new optical arrangement which allows to avoid the broadening by finite aperture in Brillouin spectroscopy. In this system, all the rays scattered at the same angle by the whole scattering volume are collected on a single pixel of the area detector. This allows to use large collection angles, increasing the luminosity without lowering the accuracy of the frequency-shift and linewidth measurements. Several results of experimental checks are provided, showing the efficiency of the device.



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