Sub-30 fs Kerr-lens mode-locked Ytterbium-activated orthoaluminate laser Weidong Chen, Zhang-Lang Lin, Huang-Jun Zeng, Wen-Ze Xue, Ge Zhang, Xiaodong Xu, Yongguang Zhao, Pavel Loiko, Xavier Mateos, Haifeng Lin et al. (2 more) EPJ Web Conf., 267 (2022) 01024 Published online: 18 October 2022 DOI: 10.1051/epjconf/202226701024