A setup for the characterisation of the polarization-encoded two-photon states is available at different wavelengths, either almost degenerate at 1560 nm, or non-degenarate around 810+1550 nm. The sources should be provided single-mode fiber-coupled. The characterisation might consist in (a) quantum state tomographic reconstruction; (b) Bell inequalities test; (c) Optimal test of non-classicality parameters (such as e.g. Negativity, Concurrence etc.) when the reconstructed states allow for. The measurement apparatus should be tailored to the costumer needs. Please contact us to discuss your measurement needs.