Absolute calibration of photodetectors: photocurrent multiplication versus photocurrent subtraction

Details Absolute calibration of photodetectors: photocurrent multiplication versus photocurrent subtraction Absolute calibration of photodetectors: photocurrent multiplication versus photocurrent subtraction

2010-12-15

arxiv.org/abs/1012.3248v1

Physics

Quantum Physics

3 pages, 2 figures, submitted to Optics Letters

Scientific paper

We report testing of the new absolute method of photodetectors calibration based on the difference-signal measurement for two-mode squeezed vacuum by comparison with the traditional absolute method based on the coincidence counting. Using low-gain parametric down conversion we have measured the quantum efficiency of a counting detector by both methods. The difference-signal method was adapted for the counting detectors by taking into account the dead-time effect.

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