Abstract
We present laser results obtained from a co-doped crystal, pumped by a blue emitting InGaN laser diode, aiming for generation of a compact 578 nm source. We exploit the yellow transition to generate yellow laser emission. The lifetime of the lower laser level is quenched, via energy transfer, to co-doped ions in the fluoride crystal. We report the growth technique, spectroscopic study, and room temperature continuous wave laser results in a hemispherical cavity at 574 nm, and with a highly reflective output coupler at 578 nm. A yellow laser at 578 nm is very relevant for metrological applications, in particular for pumping of the forbidden ytterbium clock transition, which is recommended as a secondary representation of the second in the international system of units.
© 2014 Optical Society of America
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