Quantum cascade laser frequency comb locked with 200 mrad residual phase noise Kenichi N. Komagata, Alexandre Parriaux, Mathieu Bertrand, Johannes Hillbr, Valentin J. Wittwer, Jérôme Faist and Thomas Südmeyer EPJ Web Conf., 287 (2023) 07016 Published online: 18 October 2023 DOI: 10.1051/epjconf/202328707016