Linear and nonlinear optical properties of Hafnium-doped lithium-niobate crystals

Minzioni, P.; Cristiani, Ilaria; Yu, Jianhua; Parravicini, Jacopo; Kokanyan, Edvard; Degiorgio, Vittorio

doi:10.1364/oe.15.014171

Cited by 40 publications

(19 citation statements)

References 17 publications

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“…Meanwhile, the control of photorefraction, i.e., saturated diffraction efficiency, response time, etc., is one of the most important research fields. The incorporation of transition metal ions, such as Fe, Cu, and Mn, can enhance the photorefractive properties of LN crystals [11][12][13], while Mg, In, Zr, and Hf ions would increase the optical damage resistance of LN crystals [14][15][16]. Recently, Tian et al reported that hexavalent Mo 6+ doping can tremendously enhance the photorefractive properties of LN crystals [17].…”

Section: Introductionmentioning

confidence: 99%

Photorefractive Properties of Molybdenum and Hafnium Co-Doped LiNbO3 Crystals

et al. 2018

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A series of LiNbO 3 : Mo, Hf crystals with 0.5 mol % fixed MoO 3 and various HfO 2 concentrations (0.0, 2.0, and 3.5 mol %) were grown by the Czochralski technique. The photorefractive properties of the LiNbO 3 : Mo, Hf crystals were investigated by two-wave coupling measurements and the beam distortion method was employed to obtain the optical damage resistance ability. The UV-visible and OH − absorption spectra were also studied. The experimental results imply that the photorefractive properties of LiNbO 3 : Mo crystals at laser wavelengths of 532, 488, and 442 nm can be greatly enhanced by doping HfO 2 over the threshold concentration. At 442 nm especially, the response time of LN: Mo, Hf 3.5 can be shortened to 0.9 s with a diffraction efficiency of 46.07% and a photorefractive sensitivity reaching 6.28 cm/J. Besides this, the optical damage resistance at 532 nm is 3 orders of magnitude higher than that of the mono-doped LiNbO 3 : Mo crystal, which is beneficial for applying it in the field of high-intensity lasers.

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Section: Introductionmentioning

confidence: 99%

Photorefractive Properties of Molybdenum and Hafnium Co-Doped LiNbO3 Crystals

et al. 2018

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“…A problem remains with this dopant owing to difficulties to grow large high optical quality MgO doped LN crystals. Recently, a set of tetravalent impurity ions (Hf 4+ , Sn 4+ , Zr 4+ ) as new ODR ions were checked [7][8][9][10][11]. It was shown that for these ions, the concentration threshold for ODR can be strongly reduced.…”

Section: Introductionmentioning

confidence: 99%

Zr doping on lithium niobate crystals: Raman spectroscopy and chemometrics

Kokanyan

Chapron

Kokanyan

et al. 2017

Journal of Applied Physics

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Raman measurements were investigated on Zr -doped lithium niobate LiNbO 3 crystals with different concentrations. Spectra were treated by fitting procedure and principal component analysis which both provide results consistent with each other. The concentration dependence of the frequency of the main low-frequency optical phonons gives an insight of site incorporation of Zr ions in the host lattice. The threshold concentration of about 2% is evidenced, confirming the interest of Zr doping as an alternative to Mg doping for the reduction of the optical damage in lithium niobate.

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“…Thanks to high nonlinear optical parameters the waveguide frequency conversion devices based on second harmonic generation, sum and difference frequencies, as well as parametric light generators, infrared (IR) range lasers were realized [2]. Lithium niobate is characterized by nonstoichiometric composition with a high concentration of internal defects which can be compensated with the addition of foreign impurities such as Mg, Zn, In, Sc that increase the stability of the crystal to laser irradiation [3]. Nonlinear optical properties of pure and doped with MgO till 5% crystals of lithium niobate today are well understood [4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%