Zr doping on lithium niobate crystals: Raman spectroscopy and chemometrics

Kokanyan, Ninel; Chapron, D.; Kokanyan, Edvard; Fontana, M.D.

doi:10.1063/1.4977849

Cited by 8 publications

(4 citation statements)

References 22 publications

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“…In recent years, ZrO 2 -doped LiNbO 3 (Zr:LN) has attracted great attentions because of its high optical damage resistance in the visible and even ultraviolet region, low doping threshold (2.0 mol.%) and distribution coefficient close to one 24 – 26 . Up to now, investigations on Zr:LN crystals mainly focus on optical waveguide, defect structure and co-doping with photorefractive impurities 27 – 29 , but their refractive indices and nonlinear optical properties (e.g., phase-matching temperature) are rarely reported.…”

Section: Introductionmentioning

confidence: 99%

Room temperature 90° phase-matching in zirconium and magnesium co-doped lithium niobate crystals

Kong

Liu

et al. 2018

Sci Rep

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Laser has been widely used in many aspects, by now it is difficult to get each frequency that we want, and frequency conversion is an effective way to obtain different frequency laser through a nonlinear optical crystal. MgO-doped LiNbO3 (Mg:LN) crystal has usually been used for second harmonic generation (SHG) through temperature-matching configuration with a stove, till now a room temperature 90° phase-matching is still lacking. Here we find that the SHG of Nd:YAG laser is achieved at 26.1 °C while the optical damage resistance is higher than 6.5 MW/cm2 in the ZrO2 and MgO co-doped LiNbO3 (Zr,Mg:LN) crystal. Moreover, the monotonic decrease of phase-matching temperature is firstly found with the increase of doping concentration. These unusual properties may be attributed to the formation of + defect pairs. Our work suggests that Zr,Mg:LN crystal may be an attractive candidate for nonlinear optical applications.

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Section: Introductionmentioning

confidence: 99%

Room temperature 90° phase-matching in zirconium and magnesium co-doped lithium niobate crystals

Kong

Liu

et al. 2018

Sci Rep

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“…Lithium Niobate (LN) is one of the most used ferroelectrics having a wide number of applications such as phaseconjugation, holographic storage, frequency doubling, SAW sensors [1][2][3]. It is a versatile material, the properties of which can be changed according to the nature and concentration of doping [4][5][6]. Doping these crystals with rare earth impurity ions can be interesting for laser applications, and therefore characterization of emission spectra is required.…”

Section: Introductionmentioning

confidence: 99%

Luminescence of Ho-doped lithium niobate crystals highlighted by Raman spectroscopy

Kokanyan¹,

Kokanyan²,

Babajanyan³

et al. 2018

Reflection, Scattering, and Diffraction From Surfaces VI

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Raman measurements were carried out on Ho 3+ doped Lithium Niobate crystals. When the excitation wavelength of 532nm is used, in addition of expected Raman modes, forbidden bands are detected, while when exciting with 785nm, "classical" Raman spectrum was recorded with expected modes according to Raman selection rules. Additional lines are attributed to emission lines of Ho doped crystals. We detect, within a very good resolution, in the same Stokes spectrum, the transitions between the electronic states, and the vibrational states as well. We report on the analysis of these data as function of Ho-content, for different polarizations and wavelengths, of the incident laser beam.

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“…One can notice that the loadings of the PCA1 component are the first derivative of the mentioned Raman line. This means that the PCA1 component reflects the variation of the position (Raman shift) of the mentioned band[36]. This behaviour is linked to the re-arrangement of the breathing mode of the phenylalanine-aromatic amino acids.…”

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confidence: 97%