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- W4300788144 abstract "Type II optical parametric oscillators are amongst the highest-quality sources of quantum-correlated light. In particular, when pumped above threshold, such devices generate a pair of bright orthogonally-polarized beams with strong continuous-variable entanglement. However, these sources are of limited practical use, because the entangled beams emerge with different frequencies and a diffusing phase-difference. It has been proven that the use of an internal wave-plate coupling the modes with orthogonal polarization is capable of locking the frequencies of the emerging beams to half the pump frequency, as well as reducing the phase-difference diffusion, at the expense of reducing the entanglement levels. In this work we characterize theoretically an alternative locking mechanism: the injection of a laser at half the pump frequency. Apart from being less invasive, this method should allow for an easier real-time experimental control. We show that such an injection is capable of generating the desired phase locking between the emerging beams, while still allowing for large levels of entanglement. Moreover, we find an additional region of the parameter space (at relatively large injections) where a mode with well defined polarization is in a highly squeezed vacuum state." @default.
- W4300788144 created "2022-10-04" @default.
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- W4300788144 date "2016-09-23" @default.
- W4300788144 modified "2023-09-28" @default.
- W4300788144 title "Active locking and entanglement in type II optical parametric oscillators" @default.
- W4300788144 doi "https://doi.org/10.48550/arxiv.1609.07397" @default.
- W4300788144 hasPublicationYear "2016" @default.
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