Cr$^{2+}$:CrSe laser as rare metal isotopes separation tool

The base conception of using Cr$^{2+}$:CrSe laser as a tool for $^{176}$Yb isotope optical enrichment together with experimental characteristic of laser source developed at the first stage of the project are presented. Output laser power of Cr$^{2+}$:CrSe laser with nonstationary active media and self-seeded unidirectional ring resonator run up to $\sim$21,3 W with $\sim$28,5% slope and $\sim$26,3% optical efficiency.