Figure 1

Experimental layout for entanglement generation (1; left) and characterization (2; right): (1) The source utilizes a blue pump laser diode tuned to a wavelength of λ = 405 nm and a pair of Type I BBO crystals with optical axes perpendicular to one another to generate signal and idler photons entangled in polarization at a wavelength of λ = 810 nm. The entangled photons undergo individual transformations using polarizers to evaluate Bell’s inequality parameters and are then fiber coupled. (2) Exiting from the fibers photons are mode-matched and detected by an image intensifier before registration with the Tpx3Cam camera.