Generation of correlated photons in controlled spatial modes by down-conversion in nonlinear waveguides

Details Generation of correlated photons in controlled spatial modes by down-conversion in nonlinear waveguides Generation of correlated photons in controlled spatial modes by down-conversion in nonlinear waveguides

2001-03-07

arxiv.org/abs/quant-ph/0103026v1

Opt. Lett. 26, 1367-1369 (2001)

Physics

Quantum Physics

4 pages, REVTeX

Scientific paper

10.1364/OL.26.001367

We report the observation of correlated photon pairs generated by spontaneous parametric down-conversion in a quasi-phase matched KTiOPO4 nonlinear waveguide. The highest ratio of coincidence to single photon count rates observed in the 830 nm wavelength region exceeds 18%. This makes nonlinear waveguides a promising source of correlated photons for metrology and quantum information processing applications. We also discuss possibilities of controlling the spatial characteristics of the down-converted photons produced in multimode waveguide structures.

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