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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 45, Iss. 32 — Nov. 10, 2006
  • pp: 8197–8199

Reducing the uncertainty in laser beam size measurement with a scanning edge method

G. Veshapidze, M. L. Trachy, M. H. Shah, and B. D. DePaola  »View Author Affiliations

Applied Optics, Vol. 45, Issue 32, pp. 8197-8199 (2006)

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A modification in the analysis of a conventional laser beam spot size measurement method has been developed. The new analysis significantly decreases the uncertainty in the estimation of the beam-spot size. A conventional beam scanning approach was used in the measurement, but instead of differentiating the data and fitting the result to a Gaussian function, the data were fit to an analytical approximation to the complementary error function. As a result, fitted parameters were obtained that were consistent with the standard differentiation approach, but with considerably smaller uncertainty.

© 2006 Optical Society of America

OCIS Codes
(000.2170) General : Equipment and techniques
(000.4430) General : Numerical approximation and analysis

Original Manuscript: April 26, 2006
Manuscript Accepted: May 25, 2006

G. Veshapidze, M. L. Trachy, M. H. Shah, and B. D. DePaola, "Reducing the uncertainty in laser beam size measurement with a scanning edge method," Appl. Opt. 45, 8197-8199 (2006)

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  1. M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions (National Bureau of Standards, 1964).
  2. N. G. Kingsbury, "Lecture notes on 'digital modulation,"' Courses I5 and 3F4, Department of Engineering, University of Cambridge, 1995-2005.

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