We present an innovative method to address the relation between the purity of type-I polarization entangled states and the spatial properties of the pump laser beam. Our all-optical apparatus is based on a spatial light modulator, and it offers unprecedented control on the spatial phase function of the entangled states. In this way, we demonstrate quantitatively the relation between the purity of the generated state and the spatial field correlation function of the pump beam.
© 2012 Optical Society of America
Original Manuscript: June 21, 2012
Revised Manuscript: August 14, 2012
Manuscript Accepted: August 17, 2012
Published: September 18, 2012
Simone Cialdi, Davide Brivio, Andrea Tabacchini, Ali Mohammed Kadhim, and Matteo G. A. Paris, "Innovative method to investigate how the spatial correlation of the pump beam affects the purity of polarization entangled states," Opt. Lett. 37, 3951-3953 (2012)