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About the correlation between the centre and the wings of a hard-apertured Gaussian beam

Abstract : The paper considers the influence of near-field clipping upon the accuracy of angular divergence measurement of a laser beam. We have shown that power fraction that contain the centre and the wings of a diffracted beam are not necessarily correlated. This effect can lead to systematic important errors on laser beam divergence measurement even when the beam under consideration is weakly truncated. In particular, the monitoring of any variable lensing effect can be greatly affected by such effects since one could be mistaken about its sign (converging or diverging).
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https://hal-cea.archives-ouvertes.fr/cea-00411789
Contributor : Chantal Brassy <>
Submitted on : Friday, August 28, 2009 - 8:06:37 PM
Last modification on : Thursday, February 7, 2019 - 5:45:16 PM

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  • HAL Id : cea-00411789, version 1

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Mohamed Traïche, Michael Fromager, Emmanuel Cagniot, Kamel Aït Ameur. About the correlation between the centre and the wings of a hard-apertured Gaussian beam. Optics Communications, Elsevier, 2009, 282, pp.3854-3858. ⟨cea-00411789⟩

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