Toward the Understanding of KDP Crystal Surface Height Variation by a Rapid Growth Technique

2018 ◽  
Vol 19 (1) ◽  
pp. 460-469 ◽  
Author(s):  
Kaiwei Hu ◽  
Lili Zheng ◽  
Hui Zhang ◽  
Duanyang Chen ◽  
Hongji Qi
Keyword(s):  
Rapid Growth ◽  
Crystal Surface ◽  
Height Variation ◽  
Kdp Crystal ◽  
Growth Technique

Experiment and numerical simulation of the influence mechanism of kinetic factors on rapid growth of KDP crystal

2020 ◽  
Vol 46 (1) ◽  
pp. 538-544 ◽  
Author(s):  
Duanliang Wang ◽  
Guangxia Liu ◽  
Chuanying Shen ◽  
Chengmin Chen ◽  
Yude Wang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Rapid Growth ◽  
Kdp Crystal ◽  
Influence Mechanism

Growth technique to increase the device purpose yield of a KDP crystal and assessment of its quality using X-ray and optical techniques

CrystEngComm ◽  
2013 ◽  
Vol 15 (46) ◽  
pp. 9955 ◽  
Author(s):  
S. K. Sharma ◽  
Sunil Verma ◽  
Yeshpal Singh ◽  
K. S. Bartwal
Keyword(s):  
Optical Techniques ◽  
Kdp Crystal ◽  
Growth Technique ◽  
X Ray

Waterproof coating on nonlinear optical crystal surfaces by photo–oxidation of silicone oil

2005 ◽  
Vol 890 ◽  
Author(s):  
Nobuhiro Sato ◽  
Yuji Sato ◽  
Yoshiaki Okamoto ◽  
Masataka Murahara
Keyword(s):  
Nonlinear Optical ◽  
Silicone Oil ◽  
Crystal Surface ◽  
Protective Film ◽  
Nonlinear Optical Crystal ◽  
Kdp Crystal ◽  
Excimer Lamp ◽  
Photo Oxidation ◽  
Nonlinear Optical Crystals ◽  
Optical Crystals

ABSTRACTOrganic silicone oil was photo–chemically oxidized to change into SiO2 by using a ultraviolet (UV) excimer lamp, which developed an over–coating for a nonlinear optical crystal.In general, nonlinear optical crystals are used as a wavelength conversion element for laser. The crystals are, however, deliquescent and absorb moisture in the air, which causes clouding. They need heating in the oven to prevent it. It is desired to develop a protective film on the nonlinear optical crystals so as to be waterproof and transmit UV rays. We have, then, developed the waterproof and protective film on a KH2PO4 (KDP) surface, which was photo–chemically oxidized by using a silicone oil and Xe2 excimer lamp. The silicone oil was spin–coated on the KDP crystal surface, and then the Xe2 excimer lamp was vertically irradiated to the crystal surface. The O atoms in the air were photo–excited with the UV photon to generate high active O atoms. At the same time, the C—H and the Si—C bonds of the silicone oil were photo–dissociated because the photon energy of the UV photon is higher than the bonding energies of the C—H and Si—C. The siloxane of the silicone oil was consequently linked with the O2 that had been absorbed on the crystal surface to form SiOn. As a result, the SiO2 film was formed on the KDP crystal surface by the photo–oxidation of silicone oil.The infrared spectroscopy analysis (ATR-FTIR) was carried out to investigate the modified film. The results showed that as the time of lamp irradiation extended, the absorption peak of the —CH3 groups at 2900 cm−1 decreased, but the absorption peak of the —SiO groups at 1050cm−1 increased. At the lamp irradiation time of 90 minutes, the UV transmittance of the treated silicone oil improved to 88.9 % at the 260 nm, which is the wavelength of the fourth harmonic generation, while that of the untreated silicone oil was 56 %.The treated and untreated KDP crystals were tested for their waterproofing. The untreated crystal was completely dissolved thirty minutes after soaking in the water, and on the contrary, the KDP crystal with the film coating has neither been dissolved nor gotten cloudy for three months when soaking in water.

Rapid growth of large size KDP crystal by temperature reduction method

2010 ◽  
Vol 22 (12) ◽  
pp. 2857-2859
Author(s):  
庄欣欣 Zhuang Xinxin ◽  
叶李旺 Ye Liwang ◽  
汪剑成 Wang Jiancheng ◽  
苏根博 Su Genbo ◽  
郑国宗 Zheng Guozong ◽  
...  
Keyword(s):  
Rapid Growth ◽  
Reduction Method ◽  
Kdp Crystal ◽  
Temperature Reduction ◽  
Large Size

Rapid growth of KDP crystal with new additive

2004 ◽  
Vol 269 (2-4) ◽  
pp. 443-447 ◽  
Author(s):  
Guohui Li ◽  
Genbo Su ◽  
Xinxin Zhuang ◽  
Zhengdong Li ◽  
Youping He
Keyword(s):  
Rapid Growth ◽  
Kdp Crystal

scholarly journals Growth and Characterization of Benzimidazolium Salicylate: NLO Property from a Centrosymmetric Crystal

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
M. Amudha ◽  
R. Rajkumar ◽  
V. Thayanithi ◽  
P. Praveen Kumar
Keyword(s):  
Grown Crystal ◽  
Wavelength Region ◽  
Complex Salt ◽  
X Ray Diffraction ◽  
Monoclinic System ◽  
Kdp Crystal ◽  
Growth Technique ◽  
X Ray ◽  
Nlo Property

A new organic charge transfer molecular complex salt of benzimidazolium salicylate (BSL) single crystals was grown by the slow evaporation solution growth technique using methanol as a solvent at room temperature. The grown crystals were characterised by single crystal X-ray diffraction (XRD) which confirms that the crystal belongs to monoclinic system with the centrosymmetric space group P21/c. The crystalline perfection of the grown crystal was analyzed by high resolution X-ray diffraction (HRXRD). The presence of various functional groups was identified by FTIR spectrum. UV-Vis spectral study reveals that the BSL crystal is optically transparent in the wavelength region 342 nm–1100 nm. Dielectric measurements of the crystal at various frequencies were also determined. The mechanical properties of the grown crystal were assessed using Vickers microhardness testing. Nonlinear optical property of the crystal was confirmed using Kurtz and Perry powder technique and the SHG efficiency of the BSL crystal is 0.7 times greater than that of the standard KDP crystal.

Rapid growth over 50 mm/day of water-soluble KDP crystal

1997 ◽  
Vol 171 (3-4) ◽  
pp. 531-537 ◽  
Author(s):  
Masahiro Nakatsuka ◽  
Kana Fujioka ◽  
Tadashi Kanabe ◽  
Hisanori Fujita
Keyword(s):  
Rapid Growth ◽  
Water Soluble ◽  
Kdp Crystal
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