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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 34, Iss. 7 — Apr. 1, 2009
  • pp: 1030–1032

Generation of Bessel beams using a terahertz quantum cascade laser

M. U. Shaukat, P. Dean, S. P. Khanna, M. Lachab, S. Chakraborty, E. H. Linfield, and A. G. Davies  »View Author Affiliations


Optics Letters, Vol. 34, Issue 7, pp. 1030-1032 (2009)
http://dx.doi.org/10.1364/OL.34.001030


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Abstract

We report the generation of Bessel beams using polytetrafluoroethene conical lenses and a quantum cascade laser emitting at 2.8 ‚ÄČ THz . The formation of a central beam spot that retains its size over distances exceeding the characteristic Rayleigh range is demonstrated, and the power transport properties of these beams are compared with those obtained using parabolic reflectors. These lenses could provide an attractive alternative to parabolic reflectors for terahertz imaging applications where a large depth of focus and/or efficient and controllable coupling of radiation onto a small target are desirable.

© 2009 Optical Society of America

OCIS Codes
(220.3630) Optical design and fabrication : Lenses
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade
(110.6795) Imaging systems : Terahertz imaging

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: December 3, 2008
Revised Manuscript: February 12, 2009
Manuscript Accepted: February 14, 2009
Published: March 24, 2009

Citation
M. U. Shaukat, P. Dean, S. P. Khanna, M. Lachab, S. Chakraborty, E. H. Linfield, and A. G. Davies, "Generation of Bessel beams using a terahertz quantum cascade laser," Opt. Lett. 34, 1030-1032 (2009)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-34-7-1030

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