Enhanced Nonlinear Spectral Broadening in Multi-Pass Cells Using Molecular Gases Moinuddin Kadiwala, Nazar Kovalenko, Kilian Fritsch, Semyon Goncharov and Oleg Pronin EPJ Web Conf., 267 (2022) 02032 Published online: 18 October 2022 DOI: 10.1051/epjconf/202226702032