Simultaneous oscillation of dual optical parametric oscillators on monolithic chi(2) nonlinear photonic crystalsKai-Hsun Chang, Chia-Chun Fan, Ming-Shung Tsai, Fu-Hsiang Yang, Safia Mohand Ousaid, Azzedine Boudrioua and Lung-Han PengEPJ Web Conf., 266 (2022) 06002DOI: https://doi.org/10.1051/epjconf/202226606002