We present the first observation of two-photon polarization interference structure in the second-order Glauber's correlation function of two-photon light generated via type-II spontaneous parametric down-conversion. In order to obtain this result, two-photon light is transmitted through an optical fibre and the coincidence distribution is analyzed by means of the START-STOP method. Beyond the experimental demonstration of an interesting effect in quantum optics, these results also have considerable relevance for quantum communications.
@article{arxiv.quant-ph/0603247,
title = {Dispersion spreading of biphotons in optical fibres and two-photon interference},
author = {G. Brida and M. V. Chekhova and M. Genovese and M. Gramegna and L. A. Krivitsky},
journal= {arXiv preprint arXiv:quant-ph/0603247},
year = {2009}
}