Quantum correlations and fluctuations in the pulsed light produced by a synchronously pumped optical parametric oscillator below its oscillation thresholdV. A. Averchenko, Yu. M. Golubev, C. Fabre and N. TrepsEur. Phys. J. D, 61 1 (2011) 207-214DOI: https://doi.org/10.1140/epjd/e2010-00280-7