Journal
OPTICS EXPRESS
Volume 23, Issue 2, Pages 649-654Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.23.000649
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Funding
- European Union Seventh Framework Programme [308803, BRISQ2]
- NATO project [EAP.SFPP 984397]
- RFBR [14-02-00705, 14-02-31403]
- Dynasty Foundation
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Transformation and detection of photons in higher- order spatial modes usually requires complicated holographic techniques. Detectors based on spatial holograms suffer from non-idealities and should be carefully calibrated. We report a novel method for analyzing the quality of projective measurements in spatial mode basis inspired by quantum detector tomography. It allows us to calibrate the detector response using only gaussian beams. We experimentally investigate the inherent inaccuracy of the existing methods of mode transformation and provide a full statistical reconstruction of the POVM (positive operator valued measure) elements for holographic spatial mode detectors. (C) 2015 Optical Society of America
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