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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 19 — Sep. 13, 2010
  • pp: 19566–19573

Improving directivity of laser beams by employing the effect of conical refraction in biaxial crystals

V. Peet  »View Author Affiliations


Optics Express, Vol. 18, Issue 19, pp. 19566-19573 (2010)
http://dx.doi.org/10.1364/OE.18.019566


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Abstract

The far-field pattern of Gaussian beams transformed by conical refraction in biaxial crystal is analyzed. It is shown that one of the two outgoing beam components acquires, under certain conditions, a profile with a dominating central peak. The width of this peak can be made significantly smaller than the width of the parent diffraction-limited Gaussian beam at the same propagation distance. The formation of such structurally-stable sub-diffraction beam core improves the beam directivity. Another component is a charge-one optical vortex, that forms the annular shell of the beam and carries the rest of the beam power.

© 2010 Optical Society of America

OCIS Codes
(140.3300) Lasers and laser optics : Laser beam shaping
(220.2560) Optical design and fabrication : Propagating methods

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: July 2, 2010
Revised Manuscript: August 17, 2010
Manuscript Accepted: August 17, 2010
Published: August 31, 2010

Citation
V. Peet, "Improving directivity of laser beams by employing the effect of conical refraction in biaxial crystals," Opt. Express 18, 19566-19573 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-19-19566


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References

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