Rapid growth of a large-scale (600 mm aperture) KDP crystal and its optical quality

Guohui Li; Guozong Zheng; Yingkun Qi; Peixiu Yin; En Tang; Fei Li; Jing Xu; Taiming Lei; Xiuqin Lin; Min Zhang; Junye Lu; Jinbo Ma; Youping He; and Yuangen Yao

doi:10.1017/hpl.2014.3

Journals >High Power Laser Science and Engineering >Volume 2 >Issue 1 >Page 010000e2 > Article

High Power Laser Science and Engineering
Vol. 2, Issue 1, 010000e2 (2014)

Rapid growth of a large-scale (600 mm aperture) KDP crystal and its optical quality

Guohui Li^*, Guozong Zheng, Yingkun Qi, Peixiu Yin, En Tang, Fei Li, Jing Xu, Taiming Lei, Xiuqin Lin, Min Zhang, Junye Lu, Jinbo Ma, Youping He, and and Yuangen Yao

Author Affiliations

Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China

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DOI: 10.1017/hpl.2014.3 Cite this Article Set citation alerts

Guohui Li, Guozong Zheng, Yingkun Qi, Peixiu Yin, En Tang, Fei Li, Jing Xu, Taiming Lei, Xiuqin Lin, Min Zhang, Junye Lu, Jinbo Ma, Youping He, and Yuangen Yao. Rapid growth of a large-scale (600 mm aperture) KDP crystal and its optical quality[J]. High Power Laser Science and Engineering, 2014, 2(1): 010000e2 Copy Citation Text

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2000 L crystallizer. 1-stainless steel crystallizer; 2-vessel cover; 3-thermostat; 4-rotational motor; 5-heater; 6-stirrer; 7-aluminum platform; 8-point seed.

Fig. 1. 2000 L crystallizer. 1-stainless steel crystallizer; 2-vessel cover; 3-thermostat; 4-rotational motor; 5-heater; 6-stirrer; 7-aluminum platform; 8-point seed.

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$The grown KDP crystals with sizes of (a) 680 $\times $ 580 $\times $ 540 mm$^{3}$ (growth period: 150 days) and (b) 650 $\times $ 550 $\times $ 540 mm$^{3}$ (growth period: 140 days) (b).$

Fig. 2. The grown KDP crystals with sizes of (a) 680 $\times $ 580 $\times $ 540 mm$^{3}$ (growth period: 150 days) and (b) 650 $\times $ 550 $\times $ 540 mm$^{3}$ (growth period: 140 days) (b).

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Fig. 3. Transmission spectra of KDP crystals.

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$Measured $\Delta $($n_{\mathrm{e}}$–$n_{\mathrm{o}}$) distribution for the rapid-growth KDP doubler.$

Fig. 4. Measured $\Delta $($n_{\mathrm{e}}$–$n_{\mathrm{o}}$) distribution for the rapid-growth KDP doubler.

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Sample	Sector	R-on-1 (J/cm$^{{2}}$, 10 ns)	LDT(Scale to 3 ns)
KDP-1	prismatic	25.4	15.1
KDP-2		22.0	13.1
KDP-1	pyramidal	19.5	11.6
KDP-2		19.3	11.5

Table 1. Laser damage thresholds of

$Z$

-cut KDP crystals.

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Sample	Size	Refractive-index
		nonuniformities RMS
		($\times $10$^{{-6}})$
KDP-1 (doubler-cut)	330 $\times $ 330 mm	0.843
KDP-2 (doubler-cut)	430 $\times $ 430 mm	0.572
KDP-3 (doubler-cut)	430 $\times $ 430 mm	0.727

Table 2. The comparison of refractive-index nonuniformities.

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Sample	Size	RMS ($\times $10$^{{-6}})$	RMS ($\times $10$^{{-6}})$
		(before annealing)	(after annealing)
KDP doubler-1(rapid growth)	330 $\times $ 330 mm	0.843	0.824
KDP doubler-2(rapid growth)	430 $\times $ 430 mm	0.572	0.699
KDP doubler-3(rapid growth)	430 $\times $ 430 mm	0.727	0.763
KDP doubler-4(rapid growth)	45 $\times $ 45 mm	0.771	1.23
KDP doubler-5(slow growth)	45 $\times $ 45 mm	1.02	1.13
KDP tripler-1(slow growth)	45 $\times $ 45 mm	0.469	0.736