Analysis and observation of finite beam bragg diffraction by a thick planar phase grating

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12 Scopus citations

Abstract

A numerical-impulse-response technique for studying the propagation and diffraction of finite-width beams in planar phase gratings is described. It can account for both symmetric and asymmetric diffractions. The grating-length-to-beam-width ratio is shown to govern the extent of beam-profile distortion and selectivity sidelobe suppression. Trade-offs between diffraction efficiency and beam profile have also been demonstrated. Theoretical results have been verified by experimental observa-tions in a planar waveguide geometry of diffracted beams that change from a single diffraction peak to multiple peaks as the grating-length-to-beam-width ratio increases.

Original languageEnglish (US)
Pages (from-to)582-592
Number of pages11
JournalApplied Optics
Volume35
Issue number4
DOIs
StatePublished - Feb 1 1996

Keywords

  • Diffraction
  • Finite beam
  • Grating

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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