High-yield entangled single photon source

Abstract

The various technologies presented herein relate to utilizing photons at respective idler and signal frequencies to facilitate generation of photons at a pump frequency. A strong pump field can be applied at the ωand the ωfrequencies, with the generated idler and signal pulses being utilized to generate a photon pair at the ωfrequency. Further, the idler pump power can be increased relative to the signal pump power such that the pump power P>pump power P. Such reversed operation (e.g., ω+ω→ω+ω) can minimize and/or negate Raman scattering effects. By complying with an energy conservation requirement, the ωand ωphotons interacting with the material through the four-wave mixing process facilitates the entanglement of the ωand ωphotons. The ωand ωphotons can be respectively formed in different length waveguides with a delay utilized to facilitate common timing between the ωand ωphotons.