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Article Dans Une Revue PHYSICAL REVIEW APPLIED Année : 2021

Spatiotemporal Entanglement in a Noncollinear Optical Parametric Amplifier

Résumé

We theoretically investigate the generation of two entangled beams of light in the process of single-pass type-I noncollinear frequency-degenerate parametric down-conversion with an ultrashort pulsed pump. We find the spatiotemporal squeezing eigenmodes and the corresponding squeezing eigenvalues of the generated field both numerically and analytically. The analytical solution is obtained by modeling the joint spectral amplitude of the field by a Gaussian function in curvilinear coordinates. We show that this method is highly efficient and is in good agreement with the numerical solution. We also reveal that, when the total bandwidth of the generated beams is sufficiently high, the modal functions cannot be factored into spatial and temporal parts, but exhibit a spatiotemporal coupling, whose strength can be increased by shortening the pump.

Dates et versions

hal-04536956 , version 1 (08-04-2024)

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Citer

L. La Volpe, S. De, M. I. Kolobov, V. Parigi, C. Fabre, et al.. Spatiotemporal Entanglement in a Noncollinear Optical Parametric Amplifier. PHYSICAL REVIEW APPLIED, 2021, 15 (2), ⟨10.1103/PhysRevApplied.15.024016⟩. ⟨hal-04536956⟩
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