We investigate quantum properties of light in optical parametric oscillators (OPOs) based on four-wave mixing gain in media with third-order non-linearities. In spite of other competing χ(3) effects, such as phase modulation, bipartite and tripartite entanglement are predicted above threshold. These findings are relevant for recent implementations of CMOS-compatible on-chip OPOs.
@article{arxiv.1709.00116,
title = {Third-order nonlinearity OPO: Schmidt Mode Decomposition And Tripartite Entanglement},
author = {C. González-Arciniegas and Nicolas Treps and P. Nussenzveig},
journal= {arXiv preprint arXiv:1709.00116},
year = {2018}
}