Spectroscopy and high-power laser operation of a monoclinic Yb3+:MgWO4 crystal

Identifier:  imarina:6218895

Handle: https://hdl.handle.net/20.500.11797/imarina6218895

Authors:  Loiko, Pavel; Chen, Mengting; Maria Serres, Josep; Aguilo, Magdalena; Diaz, Francesc; Lin, Haifeng; Zhang, Ge; Zhang, Lizhen; Lin, Zhoubin; Camy, Patrice; Dai, Shi-Bo; Chen, Zhencliang; Zhao, Yongguang; Wang, Li; Chen, Weidong; Griebner, Uwe; Petrov, Valentin; Mateos, Xavier

Abstract:
© 2020 Optical Society of America Monoclinic (wolframite-type) monotungstate crystals are promising for rare-earth doping. We report polarized room- and low-temperature spectroscopy and efficient high-power laser operation of such a Yb3+: MgWO4 crystal featuring high stimulated emission cross section (σSE = 6.2 × 10−20 cm2 at 1056.7 nm for light polarization E || Nm), large Stark splitting of the ground state (765 cm−1), large gain bandwidth (26.1 nm for E || Ng ), and strong Raman response (most intense mode at 916 cm−1). A diode-pumped Yb3+: MgWO4 laser generated 18.2 W at ∼1056 nm with a slope efficiency of ∼89% and a linearly polarized laser output.