Eliminating the broadening by finite aperture in Brillouin spectroscopy Article - Novembre 2011

Rémy Vialla, Benoit Ruffle, Guillaume Guimbretiere, René Vacher

Rémy Vialla, Benoit Ruffle, Guillaume Guimbretiere, René Vacher, « Eliminating the broadening by finite aperture in Brillouin spectroscopy  », Review of Scientific Instruments, novembre 2011, p. 113110. ISSN 0034-6748

Abstract

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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