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Enhancing SPDC brightness using elliptical pump shapes

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arxiv 1907.13352 v2 pith:3H54RN3U submitted 2019-07-31 physics.optics

Enhancing SPDC brightness using elliptical pump shapes

classification physics.optics
keywords pumpbrightnessellipticalmodesimprovementparametricspatialanisotropic
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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.

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