Abstract

Characteristic fringes of a spectrometer are produced by interference of a large number of wavefronts of regularly increasing phase difference. This phase difference implies a temporal delay between the wavefronts. So, the response of such an instrument to a light pulse of very short duration may not be given by the conventional formula, which generally corresponds to a steady-state situation. In this paper, the temporal response of Fabry–Perot interferometers to pulses of light of various lengths and kinds is considered and inferences are drawn regarding how to estimate the pulse lengths and how to carry out the spectral analysis of such pulses.

© 1975 Optical Society of America

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