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Polarization-Entangled Photon Pairs From a Periodically Poled Cystalline Waveguide



Zachary H. Levine, Jingyun Fan, Jun Chen, Alan L. Migdall


A proposal is made for the generation of polarization-entangled photon pairs from a periodically poled crystal. The theory is formulated in terms of colinear propagation for application to waveguides. The key feature of the theory is the use of type 2 phase matching using both the +1 and -1 diffraction orders of the poling structure. Although these conditions are fairly restrictive in terms of operating parameters, we find that a HeNe pump laser may be used for a periodically poled rubidium-doped potassium titanyl phosphate (Rb:KTP) waveguide with a single mode for both the signal and idler beams. Fidelity of 0.98 is possible under reasonable conditions.
Optics Express


KTP , RTP , Parametric Down Conversion, Production of Entangled Photons


, Z. , Fan, J. , Chen, J. and Migdall, A. (2011), Polarization-Entangled Photon Pairs From a Periodically Poled Cystalline Waveguide, Optics Express, [online],, (Accessed May 19, 2024)


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Created March 23, 2011, Updated March 16, 2021