Enhancing SPDC brightness using elliptical pump shapes

Journal article (2019)

Authors

Aitor Villar National University of Singapore
A.J. Stolk National University of Singapore
Alexander Lohrmann National University of Singapore
Alexander Ling National University of Singapore
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Published Date

2019

Language

English

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Abstract

We report on the use of elliptical pump spatial modes to increase the observed brightness of spontaneous parametric downconversion in critically phase-matched crystals. Simulations qualitatively predict this improvement, which depends on the eccentricity and orientation of the pump ellipse. We experimentally confirm a factor of two improvement in brightness when compared to the traditional circular-symmetric pump spatial modes. These results support previous theoretical work that proposes the use of elliptical pump modes to enhance the performance of parametric processes in anisotropic materials.