Nominally pure and strongly doped optically nonlinear lithium niobate crystals with low photorefractive effect and coercive field

2019 ◽  
Author(s):  
Alexander V. Syuy ◽  
Nicolay V. Sidorov ◽  
Michael N. Palatnikov ◽  
Natalya A. Teplyakova
Keyword(s):  
Lithium Niobate ◽  
Coercive Field ◽  
Photorefractive Effect ◽  
Lithium Niobate Crystals

scholarly journals Boron Influence on Defect Structure and Properties of Lithium Niobate Crystals

Crystals ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 458
Author(s):  
Nikolay V. Sidorov ◽  
Natalia A. Teplyakova ◽  
Olga V. Makarova ◽  
Mikhail N. Palatnikov ◽  
Roman A. Titov ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Defect Structure ◽  
Photorefractive Effect ◽  
Ferroelectric Properties ◽  
High Concentration ◽  
Oh Groups ◽  
Boron Doped ◽  
Compositional Uniformity ◽  
Boron Dopant ◽  
Lithium Niobate Crystals

Defect structure of nominally pure lithium niobate crystals grown from a boron doped charge have been studied by Raman and optical spectroscopy, laser conoscopy, and photoinduced light scattering. An influence of boron dopant on optical uniformity, photoelectrical fields values, and band gap have been also studied by these methods in LiNbO3 crystals. Despite a high concentration of boron in the charge (up to 2 mol%), content in the crystal does not exceed 10−4 wt%. We have calculated that boron incorporates only into tetrahedral voids of crystal structure as a part of groups [BO3]3−, which changes O–O bonds lengths in O6 octahedra. At this oxygen–metal clusters MeO6 (Me: Li, Nb) change their polarizability. The clusters determine optically nonlinear and ferroelectric properties of a crystal. Chemical interactions in the system Li2O–Nb2O5–B2O3 have been considered. Boron, being an active element, structures lithium niobate melt, which significantly influences defect structure and physical properties of a crystal grown from such a melt. At the same time, amount of defects NbLi and concentration of OH groups in LiNbO3:B is close to that in stoichiometric crystals; photorefractive effect, optical, and compositional uniformity on the contrary is higher.

Control of coercive field in lithium niobate crystals with repeated polarization reversal

2005 ◽  
Vol 120 (1-3) ◽  
pp. 150-154 ◽  
Author(s):  
Jung Hoon Ro ◽  
Doun Jeong ◽  
Taeyong Park ◽  
Chulhan Kim ◽  
Soon-Bok Kwon ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Coercive Field ◽  
Polarization Reversal ◽  
Lithium Niobate Crystals

Non-Stoichiometric Defect Effect on Coercive Field in Lithium Niobate Crystals

2002 ◽  
Vol 269 (1) ◽  
pp. 231-236 ◽  
Author(s):  
Jung Hoon Ro ◽  
Oc-Yeub Jeon ◽  
Tae-Hoon Kim ◽  
Ji-Hyun Ro ◽  
Myoungsik Cha
Keyword(s):  
Lithium Niobate ◽  
Coercive Field ◽  
Lithium Niobate Crystals

Photorefractive effect at 775 nm in doped lithium niobate crystals

2013 ◽  
Vol 103 (3) ◽  
pp. 031904 ◽  
Author(s):  
G. Nava ◽  
P. Minzioni ◽  
I. Cristiani ◽  
N. Argiolas ◽  
M. Bazzan ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
Photorefractive Effect ◽  
Lithium Niobate Crystals

Structure of Lithium Niobate Crystals with Low Photorefractive Effect

2014 ◽  
Vol 81 (4) ◽  
pp. 633-639 ◽  
Author(s):  
N. V. Sidorov ◽  
M. N. Palatnikov ◽  
A. A. Kruk ◽  
N. A. Teplyakova ◽  
O. V. Makarova
Keyword(s):  
Lithium Niobate ◽  
Photorefractive Effect ◽  
Lithium Niobate Crystals

Kinetic Dependencies of the Photorefractive Effect in Lithium Niobate Crystals

2018 ◽  
Vol 386 ◽  
pp. 186-190
Author(s):  
Alexander Vjacheslavovich Syuy ◽  
Alexei A. Gabain ◽  
Natalia A. Teplyakova ◽  
Nikolay V. Sidorov ◽  
Mikhail N. Palatnikov
Keyword(s):  
Light Scattering ◽  
Lithium Niobate ◽  
Lithium Niobate Crystal ◽  
Photorefractive Effect ◽  
Kinetic Dependence ◽  
Photoinduced Light Scattering ◽  
Lithium Niobate Crystals ◽  
Congruent Lithium Niobate

The kinetic dependence of the photorefractive effect in the congruent lithium niobate crystal is determined in the work. The adequacy of the model for calculating the photoelectric fields from the indicatrix of photoinduced light scattering is shown. Two methods for determining the induced birefringence by interferograms and on the parameters of photoinduced light scattering are compared.

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