Proposal for the generation of photon pairs with nonzero orbital angular momentum in a ring fiber
Abstract
We present a method for the generation of correlated photon pairs in desired orbital-angular-momentum states using a non-linear silica ring fiber and spontaneous parametric down-conversion. Photon-pair emission under quasi-phase-matching conditions with quantum conversion efficiency 6× 10-11 is found in a 1-m long fiber with a thermally induced (2) nonlinearity in a ring-shaped core.
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