Patent ID: 7570365

Claim:
A single-photon source system, comprising: an interferometer loop that includes first and second arms and that has an input end and an output end; first and second temperature-controlled periodically poled non-linear waveguides each having opposite input and output ends and respectively arranged in the first and second arms, wherein the input and output ends of each waveguide are adapted to create a Fabry-Perot cavity surrounding each waveguide; a temperature-controlled pump light source optically coupled to the input end of the interferometer loop so as to provide pump light to each waveguide; a phase-shifter arranged adjacent the output end of the first waveguide and optically coupled thereto; a polarization rotator arranged adjacent the output end of the second waveguide and optically coupled thereto; a polarizing beam splitter arranged at the output end of the interferometer loop so as to combine outputs from the first and second interferometer arms; and a wavelength multiplexer arranged downstream of the polarizing beam splitter so as to spatially separate entangled photons; and wherein a narrow band stabilized laser is operably coupled to the wavelength multiplexer so as to synchronize cavity spectral modes of the waveguide Fabry-Perot cavities and phase lock respective outputs of the Fabry-Perot cavities associated with the first and second waveguides.