Optimising the signal-to-noise ratio in measurement of photon pairs with detector arrays
arXiv:1407.2455 · doi:10.1103/PhysRevA.90.063811
Abstract
To evidence multimode spatial entanglement of spontaneous down-conversion, detector arrays allow a full field measurement, without any a priori selection of the paired photons. We show by comparing results of the recent literature that electron-multiplying CCD (EMCCD) cameras allow, in the present state of technology, the detection of quantum correlations with the best signal-to-noise ratio (SNR), while intensified CCD (ICCD) cameras allow at best to identify pairs. The SNR appears to be proportional to the square root of the number of coherence cells in each image, or Schmidt number. Then, corrected estimates are derived for extended coherence cells and not very low and not space-stationary photon fluxes. Finally, experimental measurements of the SNR confirm our model.
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- Quantum holography with biphotons of high dimensionality
- Correlated-photon imaging at 10 volumetric images per second
- Einstein-Podolsky-Rosen paradox in single pairs of images
- Optimizing the signal-to-noise ratio of biphoton distribution measurements
- Biphoton transmission through non-unitary objects
- A Fundamental Upper Bound for Signal to Noise Ratio of Quantum Detectors