Talbot-like bands for a laser diode below threshold

Podoleanu, Adiran G.; Taplin, S.R.; Webb, David J. and Jackson, David A. (1997). Talbot-like bands for a laser diode below threshold. Pure and applied optics, 6 (3), pp. 413-424.

Abstract

We report on the problems encountered when replacing a tungsten filament lamp with a laser diode in a set-up for displaying Talbot bands using a diffraction grating. It is shown that the band pattern is rather complex and strong interference signals may exist in situations where Talbot bands are not normally expected to appear. In these situations, the period of the bands increases with the optical path difference (OPD). The visibility of bands as dependence on path imbalance is obtained by suitably obstructing halfway into the arms of a Michelson interferometer using opaque screens.

Uncontrolled Keywords: tungsten filament lamp, laser diode, Talbot bands, diffraction grating, interference signals, optical path difference, Michelson interferometer, opaque screens
Published Date: 1997-05

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