The luminescence and absorption spectra of bixbyite-like YScO3 media doped with rare-earth ions include lines that are inhomogeneously broadened due to disorder in the crystal structure . This characteristic makes these media highly promising for applications in ultrafast lasers and chirped pulse amplification. There are some publications on lasers based on single crystal and ceramic mixed sesquioxides doped by Nd 3+ , Tm 3+ , Ho 3+ . However, Yb 3+ -doped materials can be an alternative to Nd 3+ -doped active media for lasing in the range of 1 µm. Ytterbiumdoped materials have a smaller quantum defect compared to neodymium materials, as well as a wider emission band . Therefore, ytterbium-doped matrices are more suitable as active media in femtosecond lasers. Yb 3+ ion with electronic configuration 4 f13 possesses one 2 F5/2 excited state with an energy range of 10200-11100 cm -1 , which is ideal for pumping with commercially available laser diodes emitting in the 915-980 nm range. This electronic level structure of Yb 3+ excludes possible absorption from the 2 F5/2 excited state, as there are no higher energy levels available. Successful implementation of Yb lasers has been achieved in mixed sesquioxide ceramic hosts such as Yb 3+ :(ScxY1-x)2O3 and Yb 3+ :(LuxY1-x)2O3 .