Yellow solid state laser for metrological applications

We present a blue diode pumped solid-state laser results of Dy3+-Tb3+ co-doped in LiLuF4 host crystal. We exploit the yellow Dy3+ transition between 4F9/2 ??? 6H13/2 energy levels, pumping with an InGaN laser diode. The lifetime of lower laser level is quenched via energy migrations, co-doping the fluoride crystal with Tb3+ ions. We also report the growth technique and the room temperature continuous wave (CW) laser results in a two mirrors cavity. This yellow laser at 578 nm is very relevant for metrological applications.y, in particular it corresponds to the forbidden 1S0->3P0 Ytterbium clock transition which will be used in the next generation optical clocks developed at INRiM, the Italian institute for metrology.