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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 17 — Aug. 26, 2013
  • pp: 20394–20403

White light conical diffraction

R. T. Darcy, D. McCloskey, K. E. Ballantine, B. D. Jennings, J. G. Lunney, P. R. Eastham, and J. F. Donegan  »View Author Affiliations


Optics Express, Vol. 21, Issue 17, pp. 20394-20403 (2013)
http://dx.doi.org/10.1364/OE.21.020394


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Abstract

Conical diffraction occurs when light is incident along the optic axis of a biaxial crystal. The light spreads out into a hollow cone inside the crystal, emerging as a hollow cylinder. The intensity distribution beyond the crystal is described using an adapted paraxial wave dispersion model. We show, experimentally and theoretically, how this results in a transition from conical diffraction for wavelengths at which the crystal is aligned to double refraction for misaligned wavelengths when using a white light source. The radius of the ring and location of the focal image plane (FIP) are also observed to have a wavelength dependency. The evolution of the conically diffracted beam beyond the FIP into the far field is studied and successfully described using a theoretical model.

© 2013 OSA

OCIS Codes
(050.1940) Diffraction and gratings : Diffraction
(260.1180) Physical optics : Crystal optics
(260.1440) Physical optics : Birefringence

ToC Category:
Physical Optics

History
Original Manuscript: June 21, 2013
Revised Manuscript: July 31, 2013
Manuscript Accepted: August 12, 2013
Published: August 22, 2013

Citation
R. T. Darcy, D. McCloskey, K. E. Ballantine, B. D. Jennings, J. G. Lunney, P. R. Eastham, and J. F. Donegan, "White light conical diffraction," Opt. Express 21, 20394-20403 (2013)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-17-20394


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