Abstract

Recently an experiment has been preformed by Danan et al. [1] in which a Mach-Zehnder interferometer is nested inside the arm of another such interferometer where each path between any two beam splitters contains a reflection off of a rotationally vibrating mirror as in Fig. 1. The output signal is the difference in intensity falling across two halves of a detector as a function of time. The vibrating mirrors mark the paths both in the frequency domain by introducing frequency side bands due to the Doppler effect and in the spatial domain by varying the overlap of the beams. This experiment has generated a lot of interest both in the nature of the physical effect at hand [2,3] and in its interpretation [4,5].

© 2015 IEEE