Talbot-like bands for a laser diode below threshold

Adiran G. Podoleanu, S.R. Taplin, David J. Webb, David A. Jackson

Research output: Contribution to journalArticle

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.
Original languageEnglish
Pages (from-to)413-424
Number of pages12
JournalPure and Applied Optics
Volume6
Issue number3
DOIs
Publication statusPublished - May 1997

Keywords

  • tungsten filament lamp
  • laser diode
  • Talbot bands
  • diffraction grating
  • interference signals
  • optical path difference
  • Michelson interferometer
  • opaque screens

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