Susceptibility to and correction of azimuthal aberrations in singular light beams

Details Susceptibility to and correction of azimuthal aberrations in singular light beams Susceptibility to and correction of azimuthal aberrations in singular light beams

2009-01-19

arxiv.org/abs/0901.2833v1

OPTICS EXPRESS Vol. 14, No. 22 (2006) Page-10377

Physics

Optics

Scientific paper

10.1364/OE.14.010377

We show how the effects of azimuthal optical aberrations on singular light beams can result in an intensity modulation in the beam waist or focal point spread function (PSF) that is directly proportional to the amplitude of the applied phase aberration. The resulting distortions are enough to significantly degrade the utility of the singular beams even in well corrected optical systems. However we show that pattern of these intensity modulations is related to the azimuthal order of the applied aberration and we suggest how this can be used to measure those aberrations. We demonstrate a closed loop system using a liquid crystal spatial light modulator as a programmable diffractive optical element to both generate the beam and correct for the sensed aberrations based on feedback from a CCD detected intensity image of the focal point spread function.

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