High Brightness Entangled Photon Pair Source Based on PPKTP Crystal

Correlated photon pairs can be prepared based on spontaneous parametric down conversion(SPDC) process of PPKTP crystal, then two-photon polarization entanglement state can be acquired by well-designed optics; Meanwhile single photon detection and coincidence counting system of excellent performance are equipped, they can be used to test the performance and quality of the entangled photons by detecting the destruction degree of Bell’s inequality.

High brightness entangled source based on PPKTP crystal has advantages of high quality, high brightness and excellent performance, can be used for frontier scientific research experiment and quantum information application, for instance, remote quantum key distribution, quantum teleportation, quantum computation, quantum dense coding, etc.