Fabry-Perot and Fizeau etalons are both used and are similar in ... because the measurement does not rely on an interferometer. Most spectrometers use a grating or a prism to spatially disperse the ...

A Fabry-Perot device becomes a light generator when a laser medium is used in the cavity, otherwise it is a passive filter. See distributed feedback laser and etalon. THIS DEFINITION IS FOR ...

Application of the Fabry-Perot interferometer instrument to study upper atmosphere dynamics has been one of the primary tools of ground-based optical aeronomy research ever since the beginning of the ...