Physics – Quantum Physics
Scientific paper
2012-04-11
New Journal of Physics 14 (2012) 043006
Physics
Quantum Physics
This is an author-created, un-copyedited version of an article accepted for publication in New Journal of Physics. IOP Publish
Scientific paper
10.1088/1367-2630/14/4/043006
We present in this paper a general model for determining the quantum properties of the light generated by a synchronously pumped optical parametric oscillator (SPOPO) operating below threshold. This model considers time and frequency on an equal footing, which allows us to find new quantum properties, related for example to the carrier envelope offset (CEO) phase, and to consider situations that are close to real experiments. We show that, in addition to multimode squeezing in the so-called 'supermodes', the system exhibits quadrature entanglement between frequency combs of opposite CEO phases. We have also determined the quantum properties of the individual pulses and their quantum correlations with the neighboring pulses. Finally, we determine the quantum Cramer-Rao limit for an ultra-short time delay measurement using a given number of pulses generated by the SPOPO.
Fabre Claude
Jiang Shifeng
Treps Nicolas
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