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 ${{\rm Yb}^{3 + }}{:}\,{{\rm MgWO}_4}$ crystal featuring high stimulated emission cross section (${\sigma _{\rm SE}}\; = \;{6}.{2}\; \times \;{{10}^{ - 20}}\;{{\rm cm}^2}$ at 1056.7 nm for light polarization ${\rm E}\;||\;{N_m}$), large Stark splitting of the ground state (${765}\;{{\rm cm}^{ - 1}}$), large gain bandwidth (26.1 nm for ${\rm E}\;||\;{N_g}$), and strong Raman response (most intense mode at ${916}\;{{\rm cm}^{ - 1}}$). A diode-pumped ${{\rm Yb}^{3 + }}{:}\,{{\rm MgWO}_4}$ laser generated 18.2 W at ${\sim}{1056}\;{\rm nm}$ with a slope efficiency of ${\sim}{89}\% $ and a linearly polarized laser output.

中文翻译：

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Yb ³⁺：MgWO ₄单斜晶体的光谱学和高功率激光操作

单斜晶（硅灰石型）单钨酸盐晶体有望用于稀土掺杂。我们报道了这样的$ {{\ rm Yb} ^ {3 +}} {：} \，{{\ rm MgWO} _4} $晶体的偏振室温和低温光谱学以及有效的高功率激光操作受激发射横截面（$ {\ sigma _ {\ rm SE}} \; = \; {6}。{2} \; \ times \; {{10} ^ {-20}} \\; {{\ rm cm} ^ 2} $在1056.7 nm处用于光偏振$ {\ rm E} \; || \; {N_m} $），基态的大Stark分裂（$ {765} \ ;; {{\ rm cm} ^ {-1}} $），大增益带宽（对于$ {\ rm E} \; || \; {N_g} $而言为26.1 nm ）和强拉曼响应（最强模式为$ {916} \; { {\ rm cm} ^ {-1}} $）。二极管泵浦$ {{\ RM镱} ^ {3 +}} {：} \ {{\ RM MgWO} _4} $在激光器产生18.2W¯¯ $ {\ SIM} {1056} \ {\ RM纳米} $用$ {\ sim} {89} \％$的斜率效率和线性偏振激光输出。