## Calculation of diffraction effects on the average phase of an optical field

JOSA A, Vol. 17, Issue 10, pp. 1763-1772 (2000)

http://dx.doi.org/10.1364/JOSAA.17.001763

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### Abstract

We report on algorithms for the computation of the average phase of a beam over a detector in the near field. The basic idea is to reconstruct the optical field numerically and then use a quadrature algorithm to evaluate the quantity of interest. The various algorithms that employ discrete Fourier transform techniques for the computation of the field are described, and numerical tests that assess the accuracy of these algorithms are presented. No particular algorithm delivers the desired accuracy over the entire range of Fresnel numbers of interest, but each can produce satisfactory results within a particular range. Finally, new methods to evaluate the average phase are introduced, and their efficiency is assessed.

© 2000 Optical Society of America

**OCIS Codes**

(000.4430) General : Numerical approximation and analysis

(050.1960) Diffraction and gratings : Diffraction theory

(070.2580) Fourier optics and signal processing : Paraxial wave optics

(070.2590) Fourier optics and signal processing : ABCD transforms

**History**

Original Manuscript: February 7, 2000

Revised Manuscript: May 30, 2000

Manuscript Accepted: May 30, 2000

Published: October 1, 2000

**Citation**

Miltiadis V. Papalexandris and David C. Redding, "Calculation of diffraction effects on the average phase of an optical field," J. Opt. Soc. Am. A **17**, 1763-1772 (2000)

http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-17-10-1763

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