L-band dual-comb based on gain-switched lasers for CO2 monitoring Laura Monroy, Clara Quevedo-Galán, Antonio Pérez-Serrano, Jose Manuel G. Tejero and Ignacio Esquivias EPJ Web Conf., 287 (2023) 07010 Published online: 18 October 2023 DOI: 10.1051/epjconf/202328707010