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Optical parametric oscillators (OPO) have been extensively used in the continuous variable quantum optics community as a resource to produce non-classical states of light, including squeezed states or entangled beams. In this paper, general description of multimode OPOs is presented, show that they are able to produce a very wide variety of multimode quantum states of light, and give techniques to...
We present here multimode OPOs as a source of multimode squeezing and multipartite entanglement of continuous-wave light beams, with applications to the engineering of multimode states of light in the spatial and spectral domains.
The novel aspect of this study is grounded on the fact that squeezing spectrum of a finite set of super-modes operators can be below the standard quantum limit, giving a clear image that the system is a highly quantum multi-mode system. In fact, not only the super-mode of minimum threshold is perfectly squeezed at threshold but, further, all the other super-modes have nonclassical character and are...
We realize image amplification in the continuous wave regime within an optical parametric oscillator bellow threshold. We show that its noise figure is better than that of a classical amplifier, demonstrating its quantum multimode operation.
We introduce a new device based on self-phase locking inside an optical parametric oscillator containing two crystals. The device generates directly frequency-tunable polarization entangled beams.
We report on an experiment using an OPO self phase locked via a birefringent waveplate placed inside the cavity emitting signal and idler beams which are entangled and/or squeezed depending on the waveplate parameters
We report the first experimental demonstration of conditional preparation in the continuous variable regime. Starting from intensity quantum correlated "twin beams" generated by an OPO, we obtain a sub-poissonian state displaying 4.5 dB noise reduction
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