Conical diffraction from a multi-crystal cascade: experimental observations

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The cascade conical diffraction phenomenon from up to four crystals is experimentally demonstrated. Less than one year ago M.V. Berry predicted that the focus pattern of conical diffraction from an N-crystal cascade is the superposition of 2 (N-1) single-crystal concentric conical diffraction patterns (rings), whose ring radii are a combination of those from the individual crystals in cascade. The experimental observations presented here are in full agreement with these theoretical predictions.

Original languageEnglish
Pages (from-to)281-283
Number of pages3
JournalApplied Physics B: Lasers and Optics
Issue number2
Early online date19 Apr 2011
Publication statusPublished - May 2011


  • Refraction
  • laser
  • crystals


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