Detection of multimode spatial correlation in PDC and application to the absolute calibration of a CCD camera

TL;DR

This paper introduces a novel method utilizing spatial entanglement in parametric down conversion for the absolute calibration of analog detectors, demonstrated on a CCD camera with promising metrological potential.

Contribution

The paper presents a new experimental approach for detector calibration using multimode spatial correlations in PDC, enhancing calibration accuracy.

Findings

Successful calibration of a scientific CCD camera.

Sub-shot-noise intensity correlation measured between spatial modes.

Preliminary evaluation shows strong metrological interest.

Abstract

We propose and demonstrate experimentally a new method based on the spatial entanglement for the absolute calibration of analog detector. The idea consists on measuring the sub-shot-noise intensity correlation between two branches of parametric down conversion, containing many pairwise correlated spatial modes. We calibrate a scientific CCD camera and a preliminary evaluation of the statistical uncertainty indicates the metrological interest of the method.