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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 24, Iss. 5 — May. 1, 2007
  • pp: 1030–1036

Demonstration of a horseshoe-shaped longitudinal focal profile

P. Brijesh, Terrance J. Kessler, Jonathan D. Zuegel, and David D. Meyerhofer  »View Author Affiliations


JOSA B, Vol. 24, Issue 5, pp. 1030-1036 (2007)
http://dx.doi.org/10.1364/JOSAB.24.001030


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Abstract

The three-dimensional laser focal region has been spatially shaped so that in the focal plane the transverse intensity distribution is centrally peaked, whereas at multiple defocused planes along the laser propagation direction, the distribution is annular. The longitudinal profile of such a shaped laser focal volume is approximately in the form of a “horseshoe.” The horseshoe-shaped longitudinal profile was realized experimentally from a single laser beam by the incoherent coaxial combination of Laguerre–Gaussian and Gaussian modes generated from segmented optical elements. The ponderomotive forces associated with this three-dimensional focal-intensity distribution can potentially generate a quasi-collimated, forward-directed bunch of electrons from a low-density gas target at high laser intensities.

© 2007 Optical Society of America

OCIS Codes
(070.2580) Fourier optics and signal processing : Paraxial wave optics
(100.5090) Image processing : Phase-only filters
(140.3300) Lasers and laser optics : Laser beam shaping
(140.7010) Lasers and laser optics : Laser trapping
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation
(220.4830) Optical design and fabrication : Systems design

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: October 31, 2006
Manuscript Accepted: December 26, 2006
Published: April 17, 2007

Citation
P. Brijesh, Terrance J. Kessler, Jonathan D. Zuegel, and David D. Meyerhofer, "Demonstration of a horseshoe-shaped longitudinal focal profile," J. Opt. Soc. Am. B 24, 1030-1036 (2007)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-24-5-1030

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