High-yield entangled single photon source
| DWPI Title: Method for high-yield entangled single photon source, involves forming idler photon that has first resonant frequency and forming signal photon that has second resonant frequency |
| 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 ωi and the ωs frequencies, with the generated idler and signal pulses being utilized to generate a photon pair at the ωp frequency. Further, the idler pump power can be increased relative to the signal pump power such that the pump power Pi>pump power Ps. Such reversed operation (e.g., ωi+ωs→ωp1+ωp2) can minimize and/or negate Raman scattering effects. By complying with an energy conservation requirement, the ωi and ωs photons interacting with the material through the four-wave mixing process facilitates the entanglement of the ωp1 and ωp2 photons. The ωi and ωs photons can be respectively formed in different length waveguides with a delay utilized to facilitate common timing between the ωi and ωs photons. |
| Use: Method for high-yield entangled single photon source. |
| Advantage: The pump pulse is applied to the second photon to facilitate shifting of the second photon from a first wavelength to a second wavelength. The application of a timing delay to the second photon facilitates arrival of the second photon at a wavelength division multiplexor (WDM) at the same time as the first photon. |
| Novelty: The method involves forming an idler photon that has a first resonant frequency. A signal photon is formed. The signal photon has a second resonant frequency. The idler photon and signal photon are combined to form a pair of pump photons. The pump photons have a third resonant frequency, first resonant frequency is less than third resonant frequency and third resonant frequency is less than second resonant frequency. The idler photon and signal photon are combined to form a single pulse, after idler photon exiting first waveguide (540) and signal photon exiting second waveguide (550). |
| Filed: 4/17/2014 |
| Application Number: US14255003A |
| Tech ID: SD 12235.1 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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