Modeling photon pair generation by second-order surface nonlinearity in silica nanofibers

In this paper, we present a design of an all-fiber source correlated photon pairs based on standard telecommunications tapered fibers. We examine the generation using parametric process χ ( 2 stretchy="false">) in silica optical This nonlinear is ensured thanks to surface dipole and bulk multipole nonlinearities. The creation modeled by taking into account vector aspect propagation field nanofiber. phase matching provided propagating pump one spatial mode while generating pair another mode. efficiency depends diameter uniformity nanofiber after manufacturing process. size for good optimization efficiency, report that tolerance Δ 22 000 mathvariant="normal">p mathvariant="normal">a mathvariant="normal">i mathvariant="normal">r mathvariant="normal">s / , 1 W power length 1.1 mm. Deposits can be used order relax constraints maximize pairs. As example, use polytetrafluoroethylene applied as cladding whose thickness infinite makes it possible diameter. For same 78 2.4 mm predicted.