Rapid growth and properties of large-aperture 98%-deuterated DKDP crystals

In this paper, a highly deuterated potassium dihydrogen phosphate (DKDP) crystal with sizes up to $318~\text{mm}\times 312~\text{mm}\times 265~\text{mm}$ was grown by the rapid-growth method. The synthesis tank device was specially designed to synthesize a higher deuterium concentration and high-pur...

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Bibliographic Details
Published in:High power laser science and engineering 2019, Vol.7, Article e46
Main Authors: Cai, Xumin, Lin, Xiuqing, Li, Guohui, Lu, Junye, Hu, Ziyu, Zheng, Guozong
Format: Article
Language:English
Subjects:
Absorptivity
Apertures
Crystal growth
Crystals
Deuteration
Deuterium
Gravimetric analysis
Hydrogen
Infrared analysis
Infrared spectroscopy
KDP crystals
Laser damage
Methods
Optics
Potassium
Potassium phosphates
Raw materials
Spectrum analysis
Yield point
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Summary:In this paper, a highly deuterated potassium dihydrogen phosphate (DKDP) crystal with sizes up to $318~\text{mm}\times 312~\text{mm}\times 265~\text{mm}$ was grown by the rapid-growth method. The synthesis tank device was specially designed to synthesize a higher deuterium concentration and high-purity DKDP solution. The deuterium content of the as-grown crystal, which was 97.9%, was determined by two methods, including infrared (IR) spectroscopy and thermo-gravimetric analysis (TGA) measurements. The performances of the 97.9% DKDP crystal, including transmission, absorption coefficient, and laser-induced damage threshold (LIDT) were measured. The results indicate that, in the near-infrared band, the transmission of the 97.9% DKDP crystal is higher than that of KDP and 70% DKDP crystals, and the absorption coefficient is lower. The LIDT of the crystal reached $23.2~\text{J}\cdot \text{cm}^{-2}$ (R-on-1, 1064 nm, 3 ns), which meets the engineering requirements for use in optical applications.
ISSN:2095-4719
2052-3289
DOI:10.1017/hpl.2019.24