Effective signal-to-noise ratio improvement by parametric image amplification.
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.
Devaux
Fabrice
F
Institut Femto-ST, Laboratoire d'Optique P. M. Duffieux, UMR 6174 CNRS/Université de Franche Comté, Besançon, France.
Blanchet
Jean Luc
JL
Lantz
Eric
E