Spatiotemporal entanglement in a noncollinear optical parametric amplifier

• URL: http://arxiv.org/abs/2009.10511v2
• Date: Sun, 7 Mar 2021 08:59:31 GMT
• Title: Spatiotemporal entanglement in a noncollinear optical parametric amplifier
• Authors: L. La Volpe, S. De, M. I. Kolobov, V. Parigi, C. Fabre, N. Treps, D. B. Horoshko
• Abstract summary: We investigate the generation of two entangled beams of light in the process of single-pass type parametric conversion down with an ultra-short pulsed pump. We find the degenerate-temporal eigenmodes and the corresponding squeezing eigenvalues of the generated field both numerically and analytically.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We theoretically investigate the generation of two entangled beams of light in the process of single-pass type-I noncollinear frequency degenerate parametric downconversion with an ultrashort pulsed pump. We find the spatio-temporal 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 a 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 a spatial and a temporal parts, but exhibit a spatio-temporal coupling, whose strength can be increased by shortening the pump.

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