Effective signal-to-noise ratio improvement by parametric image amplification
F. Devaux, Jean-Luc Blanchet, Éric Lantz · Optics Letters · 2006
We show experimentally that parametric optical preamplification greatly improves the signal-to-noise ratio of an image if the detector has a poor quantum efficiency and/or a great level of readout noise. Results are fully consistent with the theory of quantum-noise-limited amplification.