Abstract
The optical properties of area detectors used in conjunction with Fabry–Pérot interferometers are analyzed. A system using a charge-coupled device as a detector for Brillouin spectroscopy is described. With a 2 pass+2 pass tandem system the finesse ranges from 50 to 63. With a collection time of about 2.5 min, the intensity of the surface Rayleigh mode and the bulk acoustic modes of Si are comparable to those obtained by scanning for many hours.
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