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.
, Fan, J.
, Chen, J.
and Migdall, A.
Polarization-Entangled Photon Pairs From a Periodically Poled Cystalline Waveguide, Optics Express, [online], https://doi.org/10.1364/OE.19.006724, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=906873
(Accessed November 30, 2023)