The single-photon interference system is an expanding experiment system which is on the strength of the miniaturized BBO crystal entangled source developed by QuantumCTek. The system exploits one of the entangled photon pairs as single-photon source. The single-photon will produce interference in the interference ring after collimation. The interference photons will be captured and counted by single-photon detector system. The final interference phenomenon will be presented in the PC software simultaneously.

The experiment system has advantages of little size and good maneuverability, and is convenient for researchers to comprehend the experiment principle of single-photon interference in practical operation. Moreover, we can use the same system to do some expanding scientific research.