Coupling effects for counterpropagating light beams in lithium niobate crystals studied by grating translation technique for extremely high external electric fields

2003 ◽  
Vol 94 (10) ◽  
pp. 6274-6279 ◽  
Author(s):  
M. Luennemann ◽  
K. Buse ◽  
B. Sturman
Keyword(s):  
Lithium Niobate ◽  
Electric Fields ◽  
Coupling Effects ◽  
External Electric Fields ◽  
Translation Technique ◽  
Light Beams ◽  
Lithium Niobate Crystals

Electrooptic properties of lithium niobate crystals for extremely high external electric fields

2003 ◽  
Vol 76 (4) ◽  
pp. 403-406 ◽  
Author(s):  
M. Luennemann ◽  
U. Hartwig ◽  
G. Panotopoulos ◽  
K. Buse
Keyword(s):  
Lithium Niobate ◽  
Electric Fields ◽  
External Electric Fields ◽  
Lithium Niobate Crystals

Pyroelectric Self-Focusing of Light Beams in Reduced Lithium Niobate Crystals

2015 ◽  
Vol 82 (3) ◽  
pp. 479-482 ◽  
Author(s):  
S. M. Kostritskii ◽  
M. Chauvet ◽  
J. Safi oui ◽  
M. Aillerie ◽  
O. G. Sevostyanov
Keyword(s):  
Lithium Niobate ◽  
Self Focusing ◽  
Light Beams ◽  
Lithium Niobate Crystals

scholarly journals Collinear acousto-optical filtration of polychromatic Bessel light beams in lithium niobate crystals

2021 ◽  
Vol 2127 (1) ◽  
pp. 012033
Author(s):  
G V Kulak ◽  
P I Ropot ◽  
O V Shakin
Keyword(s):  
Lithium Niobate ◽  
Lithium Niobate Crystal ◽  
Overlap Integrals ◽  
Phase Synchronism ◽  
Bessel Light Beam ◽  
Filter Bandwidth ◽  
Acousto Optical Interaction ◽  
Light Beams ◽  
Lithium Niobate Crystals ◽  
Bessel Light Beams

Abstract The features of collinear acousto - optical filtration of quasi - diffractive Bessel light beams of o- and e-type in uniaxial crystals are investigated. Using the method of overlap integrals, an expression is found for the diffraction efficiency depending on the parameters of the acousto-optical interaction, as well as on the values of the overlap integrals. It is shown that for the zero-order mode of a Bessel light beam for a lithium niobate crystal under conditions of transverse phase synchronism and in the optical spectrum range of 0.4-0.7 μm, the filter bandwidth of ∼0.2 nm is achievable; with an increase in the order of the mode m≥1, the increase in the bandwidth is insignificant and is ∼0.23 -0.24 nm.

Growth and Characterization of High Homogeneity Heavily MgO-doped Lithium Niobate Crystals

2011 ◽  
Vol 25 (12) ◽  
pp. 1257-1262 ◽  
Author(s):  
Xiao-Niu TU ◽  
Yan-Qing ZHENG ◽  
Hui CHEN ◽  
Hai-Kuan KONG ◽  
Jun XIN ◽  
...  
Keyword(s):  
Lithium Niobate ◽  
High Homogeneity ◽  
Lithium Niobate Crystals

Formation of Regular Domain Structures in Quenched Ferroelectrics Under the Influence of an External High-frequency Electric Field

2019 ◽  
Vol 9 (3) ◽  
pp. 344-352 ◽  
Author(s):  
L.I. Stefanovich ◽  
O.Y. Mazur ◽  
V.V. Sobolev
Keyword(s):  
Lithium Niobate ◽  
Electric Field ◽  
Domain Structure ◽  
High Frequency ◽  
Evolution Equations ◽  
Regular Domain ◽  
Field Frequency ◽  
Domain Structures ◽  
Alternating Electric Field ◽  
Lithium Niobate Crystals

Introduction: Within the framework of the phenomenological theory of phase transitions of the second kind of Ginzburg-Landau, the kinetics of ordering of a rapidly quenched highly nonequilibrium domain structure is considered using the lithium tantalate and lithium niobate crystals as an example. Experimental: Using the statistical approach, evolution equations describing the formation of the domain structure under the influence of a high-frequency alternating electric field in the form of a standing wave were obtained. Numerical analysis has shown the possibility of forming thermodynamically stable mono- and polydomain structures. It turned out that the process of relaxation of the system to the state of thermodynamic equilibrium can proceed directly or with the formation of intermediate quasi-stationary polydomain asymmetric phases. Results: It is shown that the formation of Regular Domain Structures (RDS) is of a threshold character and occurs under the influence of an alternating electric field with an amplitude less than the critical value, whose value depends on the field frequency. The conditions for the formation of RDSs with a micrometer spatial scale were determined. Conclusion: As shown by numerical studies, the RDSs obtained retain their stability, i.e. do not disappear even after turning off the external electric field. Qualitative analysis using lithium niobate crystals as an example has shown the possibility of RDSs formation in high-frequency fields with small amplitude under resonance conditions

scholarly journals Electro-Optic Control of Lithium Niobate Bulk Whispering Gallery Resonators: Analysis of the Distribution of Externally Applied Electric Fields

Crystals ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 298
Author(s):  
Yannick Minet ◽  
Hans Zappe ◽  
Ingo Breunig ◽  
Karsten Buse
Keyword(s):  
Lithium Niobate ◽  
Electric Field ◽  
Electric Fields ◽  
Frequency Comb ◽  
Parametric Oscillation ◽  
Pockels Effect ◽  
Optical Mode ◽  
Cylindrical Resonator ◽  
Whispering Gallery ◽  
Electro Optic

Whispering gallery resonators made out of lithium niobate allow for optical parametric oscillation and frequency comb generation employing the outstanding second-order nonlinear-optical properties of this material. An important knob to tune and control these processes is, e.g., the linear electro-optic effect, the Pockels effect via externally applied electric fields. Due to the shape of the resonators a precise prediction of the electric field strength that affects the optical mode is non-trivial. Here, we study the average strength of the electric field in z-direction in the region of the optical mode for different configurations and geometries of lithium niobate whispering gallery resonators with the help of the finite element method. We find that in some configurations almost 100% is present in the cavity compared to the ideal case of a cylindrical resonator. Even in the case of a few-mode resonator with a very thin rim we find a strength of 90%. Our results give useful design considerations for future arrangements that may benefit from the strong electro-optic effect in bulk whispering gallery resonators made out of lithium niobate.

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