Spatially-multiplexed tunable dual-comb optical parametric oscillator at 250 MHzC. P. Bauer, J. Pupeikis, B. Willenberg, Z. A. Bejm, N. Pezzoli, C. R. Phillips and U. KellerEPJ Web Conf., 267 (2022) 01009DOI: https://doi.org/10.1051/epjconf/202226701009