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Polarization entanglement with graded-index lenses

Appl. Phys. Lett. 95, 181110 (2009); doi:10.1063/1.3257376

Published 6 November 2009

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Giuseppe Vallone,1,2 Gaia Donati,2 Francesco De Martini,2,3 and Paolo Mataloni2,4
1Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi,” Via Panisperna 89/A, Compendio del Viminale, Roma 00184, Italy
2Dipartimento di Fisica, Sapienza Università di Roma, Roma 00185, Italy
3Accademia Nazionale dei Lincei, via della Lungara 10, Roma 00165, Italy
4Istituto Nazionale di Ottica Applicata (INOA-CNR), L.go E. Fermi 6, 50125 Florence, Italy
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 two-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. ©2009 American Institute of Physics
History: Received 29 July 2009; accepted 8 October 2009; published 6 November 2009
Permalink: http://link.aip.org/link/?APPLAB/95/181110/1
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KEYWORDS and PACS

Keywords
PACS
  • 42.79.Bh
    Optical lenses, prisms and mirrors
  • 42.79.Ry
    Gradient-index (GRIN) devices
  • YEAR: 2009

PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
Publisher:
AIP is a member of CrossRef AIP

REFERENCES (25)
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