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Quadrant detector calibration for vortex beams
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DOI：10.1364/OL.36.000409.png)
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Abstract
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This Letter reports an experimental and theoretical study of the response of a quadrant detector (QD) to an incident vortex beam, specifically a Laguerre-Gaussian (LG) beam. We have found that the LG beam response depends on the vorticity index l. We compare LG beams with hard-ringed beams and find that at higher l values, the QD response to LG beams can be approximated by its response to hard-ringed beams. Our findings are important in view of the increasing interest in optical vortex beams. (C) 2011 Optical Society of America
Keywords:
ORBITAL ANGULAR-MOMENTUM
MODES
PHOTONS
LIGHT
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