Improvement in continuous-wave laser performance of disordered Yb:CNGG crystal

Zhichao Zhou; Xueping Tian; Qibiao Dai; Wenjuan Han; Jiayin Huang; Junhai Liu; Huaijin Zhang

doi:10.1364/AO.51.004042

Applied Optics
Vol. 51,
Issue 18,
pp. 4042-4046
(2012)
•https://doi.org/10.1364/AO.51.004042

Improvement in continuous-wave laser performance of disordered Yb:CNGG crystal

Zhichao Zhou, Xueping Tian, Qibiao Dai, Wenjuan Han, Jiayin Huang, Junhai Liu, and Huaijin Zhang

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Zhichao Zhou, Xueping Tian, Qibiao Dai, Wenjuan Han, Jiayin Huang, Junhai Liu, and Huaijin Zhang, "Improvement in continuous-wave laser performance of disordered Yb:CNGG crystal," Appl. Opt. 51, 4042-4046 (2012)

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Abstract

We report on a significant improvement in cw laser performance of the disordered Yb:CNGG crystal. Very efficient cw laser operation is demonstrated at room temperature with a 3.5 mm thick crystal end pumped by a diode laser, generating an output power of 5.15 W with an optical-to-optical efficiency of 46%, whereas the slope efficiency amounts to 80%.

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Crystal Length (mm)	1.5	2.5	3.5
$A$	0.20	0.31	0.40
$B_{1} (\times 10^{- 3})$	$- 7.6$	$- 4.5$	0.77
$B_{2} (\times 10^{- 3})$	6.5	7.5	7.2
$B_{3} (\times 10^{- 3})$	$- 0.33$	$- 0.38$	$- 0.38$

Crystal Length (mm)	$P_{abs, th}$ (W)	$P_{abs, \max}$ (W)	$P_{out, \max}$ (W)	$η_{p}$	$η_{opt - opt}$ (%)	$η_{s}$ (%)	$λ_{lasing}$ (nm)
1.5	0.50	6.53	2.58	0.20–0.50	40	61	1032–1039
2.5	0.85	9.87	4.13	0.31–0.68	42	60	1037–1046
3.5	1.10	11.13	4.55	0.41–0.80	41	70	1039–1047
1.5b	0.57	2.0	0.62	0.31	31	50	1045.3
2.5c	0.79	6.32	2.0	0.25	32	40	1045–1049

Crystal Length (mm)	1.5	2.5	3.5
$A$	0.20	0.31	0.40
$B_{1} (\times 10^{- 3})$	$- 7.6$	$- 4.5$	0.77
$B_{2} (\times 10^{- 3})$	6.5	7.5	7.2
$B_{3} (\times 10^{- 3})$	$- 0.33$	$- 0.38$	$- 0.38$

Crystal Length (mm)	$P_{abs, th}$ (W)	$P_{abs, \max}$ (W)	$P_{out, \max}$ (W)	$η_{p}$	$η_{opt - opt}$ (%)	$η_{s}$ (%)	$λ_{lasing}$ (nm)
1.5	0.50	6.53	2.58	0.20–0.50	40	61	1032–1039
2.5	0.85	9.87	4.13	0.31–0.68	42	60	1037–1046
3.5	1.10	11.13	4.55	0.41–0.80	41	70	1039–1047
1.5b	0.57	2.0	0.62	0.31	31	50	1045.3
2.5c	0.79	6.32	2.0	0.25	32	40	1045–1049

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Applied Optics