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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 35, Iss. 7 — Apr. 1, 2010
  • pp: 901–903

Beam waist measurement for terahertz time-domain spectroscopy experiments

Alexander Podzorov, Antoine Wojdyla, and Guilhem Gallot  »View Author Affiliations


Optics Letters, Vol. 35, Issue 7, pp. 901-903 (2010)
http://dx.doi.org/10.1364/OL.35.000901


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Abstract

Classical masking aperture methods are found to be mostly inaccurate to determine the terahertz beam size in terahertz time-domain spectroscopy (TDS) experiments, owing to complex diffraction effects. Here, we present a simple and reliable method for measuring beam waists in terahertz TDS. It is based on the successive diffraction by an opaque disk followed by a small circular aperture.

© 2010 Optical Society of America

OCIS Codes
(050.1940) Diffraction and gratings : Diffraction
(140.3295) Lasers and laser optics : Laser beam characterization
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Lasers and Laser Optics

History
Original Manuscript: December 1, 2009
Revised Manuscript: February 1, 2010
Manuscript Accepted: February 4, 2010
Published: March 17, 2010

Citation
Alexander Podzorov, Antoine Wojdyla, and Guilhem Gallot, "Beam waist measurement for terahertz time-domain spectroscopy experiments," Opt. Lett. 35, 901-903 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-7-901


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