Open AccessFlux enhancement of photons entangled in orbital angular momentum
Author(s) -
Silvana Palacios,
Roberto de J. LeónMontiel,
Martin Hendrych,
Alejandra Valencia,
Juan P. Torres
Publication year - 2011
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.19.014108
Subject(s) - physics , photon , angular momentum , spontaneous parametric down conversion , photon entanglement , optics , orbital angular momentum of light , parametric statistics , quantum mechanics , quantum entanglement , total angular momentum quantum number , quantum , statistics , mathematics
Entangled photons are generally collected by detection systems that select their certain spatial modes, for example using single-mode optical fibers. We derive simple and easy-to-use expressions that allow us to maximize the coupling efficiency of entangled photons with specific orbital angular momentum (OAM) correlations generated by means of spontaneous parametric downconversion. Two different configurations are considered: one in which the beams with OAM are generated by conversion from beams without OAM, and the second when beams with OAM are generated directly from the nonlinear medium. Also, an example of how to generate a maximally entangled qutrit is presented.