Polarization entanglement with GRaded-INdex lenses

Details Polarization entanglement with GRaded-INdex lenses Polarization entanglement with GRaded-INdex lenses

2009-06-15

arxiv.org/abs/0906.2642v2

Applied Physics Letters 95, 181110 (2009)

Physics

Quantum Physics

4 pages, 4 figures, version 2

Scientific paper

10.1063/1.3257376

By using an optical device based on the integration of a GRaded-INdex (GRIN) rod lens and a single-mode optical fiber we efficiently collected photon pairs generated by spontaneous parametric down-conversion. We show that this system preserves the polarization entanglement of the 2-photon states. Hence this device, characterized by a remarkable easiness of alignment and allowing for high coupling efficiency of single-mode radiation, can be used with photons entangled in various degrees of freedom, such as polarization and spatial momentum, and to interconnect different sides of complex optical circuits.

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