An anti-bunched photon field is produced from a thin-film ppln waveguide by mixing the on-chip two-photon state with a weak but matched coherent state. This is achieved by taking out the two-photon part of the coherent state via a destructive two-photon interference with the on-chip two-photon state. We achieve a photon rate of 100 kHz with a g2-value of 0.35. This anti-bunched light field will have applications in high-resolution quantum imaging such as long baseline quantum telescopy for enhancing the signal-to-noise ratio.
@article{arxiv.2508.10135,
title = {Generation of a CW anti-bunched photon field from a thin-film PPLN waveguide by two-photon interference with a weak coherent state},
author = {Yue Li and Haochuan Li and Yuhang Lei and Xiaoting Li and Jianmin Wang and Xuan Tang and Mu Ku Chen and E. Y. B. Pun and Cheng Wang and Z. Y. Ou},
journal= {arXiv preprint arXiv:2508.10135},
year = {2025}
}