Talbot-like bands for a laser diode below threshold


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
Publication ISSN: 0963-9659
Last Modified: 23 Oct 2019 11:28
Date Deposited: 12 May 2011 11:31
Published Date: 1997-05
Authors: Podoleanu, Adiran G.
Taplin, S.R.
Webb, David J.
Jackson, David A.


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