New all-solid-state tunable UV Ce$^{3+}$,Yb$^{3+}$:LiY$_{0.4}$Lu$_{0.6}$F$_4$ laser

Here we report laser test results of the new UV solid-state active medium based on a Ce$^{3+}$,Yb$^{3+}$:LiY$_{0.4}$Lu$_{0.6}$F$_4$ mixed crystal pumped by radiation from Ce:LiCAF laser. The 10-Hz pulse repetition rate Ce$^{3+}$,Yb$^{3+}$:LiY$_{0.4}$Lu$_{0.6}$F$_4$ laser yielded a maximum output power of $0.25$ mJ at $311$ nm in non-optimized non-selective resonator with a maximal slope efficiency of $13\,\%$. Tunability from $304$ to $332$ nm was achieved in the selective single-prizm resonator.