We propose a new method for generating photon pairs from coherent light using polarization-dependent two-photon absorption. We study the photon statistics of two orthogonally polarized modes by solving a master equation, and show that when we prepare a coherent state in one polarization mode, photon pairs are created in the other mode. The photon pairs have the same frequency as that of the incident light.
@article{arxiv.quant-ph/0302005,
title = {Generation of photon pairs using polarization-dependent two-photon absorption},
author = {T. Nakanishi and K. Sugiyama and M. Kitano},
journal= {arXiv preprint arXiv:quant-ph/0302005},
year = {2009}
}