Abstract

Room-temperature tunable cw laser oscillation of ${\mathrm{Cr}}^{3+}$ ions in forsterite crystals $\left({\mathrm{Mg}}_2{\mathrm{SiO}}_4\right)$ codoped with chromium and lithium has been demonstrated, for the first time to the authors' knowledge, in pumping a crystal with a Ti:sapphire laser into the first excited level of ${\mathrm{Cr}}^{3+}$ ions (${}^{4}A_2–{}^{4}T_2$ transition). The laser is smoothly tunable in the region of $1095–1170\mathrm{nm}$. A slope efficiency as great as 4.4% has been achieved.

© 2006 Optical Society of America

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