Pulsed homodyne measurements of femtosecond squeezed pulses generated by single-pass parametric deamplification.
A new scheme is described for the generation of pulsed squeezed light by use of femtosecond pulses that have been parametrically deamplified through a single pass in a thin (100-microm) potassium niobate crystal with a significant deamplification of approximately -3 dB. The quantum noise of each pulse is registered in the time domain by single-shot homodyne detection operated with femtosecond pulses; the best squeezed quadrature variance was 1.87 dB below the shot-noise level. Such a scheme provides a basic resource for time-resolved quantum communication protocols.
Wenger
Jérôme
J
Laboratoire Charles Fabry de l'Institut d'Optique, Centre National de la Recherche Scientifique, Unité Mixte de Recherche 8501, F-91403 Orsay, France. jerome.wenger@iota.u-psud.fr
Tualle-Brouri
Rosa
R
Grangier
Philippe
P