Proposal for in-fiber generation of telecom-band polarization-entangled photon pairs using a periodically poled fiber.
We treat spontaneous parametric downconversion in a periodically poled fiber, quasi-phase matched to allow for the generation of photon pairs at wavelengths within the low-loss telecommunications window. For an appropriate pump polarization, the unusual properties of such a fiber's effective chi(2) result in a biphoton wave function that is symmetric upon simultaneous exchange of downconverted photon frequencies and polarizations and that is nonzero over a wide range of downconverted frequencies. This could lead to a significant technical simplification of sources of in-fiber telecom-band polarization-entangled photons.
Helt
L G
LG
Department of Physics, University of Toronto, Toronto, Ontario, Canada. lhelt@physics.utoronto.ca
Zhu
Eric Y
EY
Liscidini
Marco
M
Qian
Li
L
Sipe
J E
JE