Spectroscopy and high-power laser operation of a monoclinic Yb<sup>3+</sup>:MgWO<sub>4</sub> crystal

Pavel Loiko; Mengting Chen; Josep Maria Serres; Magdalena Aguiló; Francesc Díaz; Haifeng Lin; Ge Zhang; Lizhen Zhang; Zhoubin Lin; Patrice Camy; Shi-Bo Dai; Zhenqiang Chen; Yongguang Zhao; Li Wang; Weidong Chen; Uwe Griebner; Valentin Petrov; Xavier Mateos

doi:10.1364/OL.389627

Optics Letters
Vol. 45,
Issue 7,
pp. 1770-1773
(2020)
•https://doi.org/10.1364/OL.389627

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

Pavel Loiko, Mengting Chen, Josep Maria Serres, Magdalena Aguiló, Francesc Díaz, Haifeng Lin, Ge Zhang, Lizhen Zhang, Zhoubin Lin, Patrice Camy, Shi-Bo Dai, Zhenqiang Chen, Yongguang Zhao, Li Wang, Weidong Chen, Uwe Griebner, Valentin Petrov, and Xavier Mateos

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Pavel Loiko, Mengting Chen, Josep Maria Serres, Magdalena Aguiló, Francesc Díaz, Haifeng Lin, Ge Zhang, Lizhen Zhang, Zhoubin Lin, Patrice Camy, Shi-Bo Dai, Zhenqiang Chen, Yongguang Zhao, Li Wang, Weidong Chen, Uwe Griebner, Valentin Petrov, and Xavier Mateos, "Spectroscopy and high-power laser operation of a monoclinic Yb³⁺:MgWO₄ crystal," Opt. Lett. 45, 1770-1773 (2020)

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Abstract

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.

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Crystal	Site	$λ_{e m}$ (nm)	$Δ λ_{g}$ (nm)	$σ_{S E}$ $(10^{- 20} {c m}^{2})$	$τ_{l u m}$ $µ s$	Ref.
$N a Y ({W O}_{4})_{2}$	$S_{4}$	$1018 (π)$ $1024 (σ)$	$33.9 (π)$ $25.9 (σ)$	$1.38 (π)$ $0.86 (σ)$	309	[20]
$K L u ({W O}_{4})_{2}$	$C_{2}$	$1026.7 (m)$ $1041.2 (p)$	$20.2 (m)$ $28.0 (p)$	$2.6 (m)$ $1.3 (p)$	275	[8]
${M g W O}_{4}$	$C_{2}$	$1056.7 (m)$ $1056.6 (g)$	$15.1 (m)$ $26.1 (g)$	$6.25 (m)$ $1.68 (g)$	366	*

Crystal	${Y b}^{3 +}$ (at.%)	$P_{o u t}$ (W)	$λ_{L}$ (nm)	$P_{t h}$ (W)	$η$ (%)	Ref.
$Y b : {L u V O}_{4}$	1.5	8.3	1031	2.6	80	[21]
$Y b : {C a G d A l O}_{4}$	8	7.79	$\sim 1061$	2.0	84	[13]
$Y b : {L u A l O}_{3}$	2	9.6	1041	$\sim 1.5$	74	[22]
$Y b : N a Y ({W O}_{4})_{2}$	4.8	5.2	1045	1.20	50	[23]
$Y b : K L u ({W O}_{4})_{2}$	5.2	11.0	$\sim 1045$	0.61	80	[24]
$Y b : {M g W O}_{4}$	1.25	18.2	$\sim 1056$	0.54	89	^b
$Y b : {C a}_{4} G d O ({B O}_{3})_{3}$	10	18.2	1032	$\sim 1$	70	[25]
$Y b : {Y A l}_{3} ({B O}_{3})_{4}$	5.6	10.6	1042	0.79	72	[26]
$Y b : {L u}_{3} {G a}_{5} O_{12}$	7.1	8.97	1040	1.22	75	[27]

Crystal	Site	$λ_{e m}$ (nm)	$Δ λ_{g}$ (nm)	$σ_{S E}$ $(10^{- 20} {c m}^{2})$	$τ_{l u m}$ $µ s$	Ref.
$N a Y ({W O}_{4})_{2}$	$S_{4}$	$1018 (π)$ $1024 (σ)$	$33.9 (π)$ $25.9 (σ)$	$1.38 (π)$ $0.86 (σ)$	309	[20]
$K L u ({W O}_{4})_{2}$	$C_{2}$	$1026.7 (m)$ $1041.2 (p)$	$20.2 (m)$ $28.0 (p)$	$2.6 (m)$ $1.3 (p)$	275	[8]
${M g W O}_{4}$	$C_{2}$	$1056.7 (m)$ $1056.6 (g)$	$15.1 (m)$ $26.1 (g)$	$6.25 (m)$ $1.68 (g)$	366	*

Crystal	${Y b}^{3 +}$ (at.%)	$P_{o u t}$ (W)	$λ_{L}$ (nm)	$P_{t h}$ (W)	$η$ (%)	Ref.
$Y b : {L u V O}_{4}$	1.5	8.3	1031	2.6	80	[21]
$Y b : {C a G d A l O}_{4}$	8	7.79	$\sim 1061$	2.0	84	[13]
$Y b : {L u A l O}_{3}$	2	9.6	1041	$\sim 1.5$	74	[22]
$Y b : N a Y ({W O}_{4})_{2}$	4.8	5.2	1045	1.20	50	[23]
$Y b : K L u ({W O}_{4})_{2}$	5.2	11.0	$\sim 1045$	0.61	80	[24]
$Y b : {M g W O}_{4}$	1.25	18.2	$\sim 1056$	0.54	89	^b
$Y b : {C a}_{4} G d O ({B O}_{3})_{3}$	10	18.2	1032	$\sim 1$	70	[25]
$Y b : {Y A l}_{3} ({B O}_{3})_{4}$	5.6	10.6	1042	0.79	72	[26]
$Y b : {L u}_{3} {G a}_{5} O_{12}$	7.1	8.97	1040	1.22	75	[27]

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