Optical and Ferroelectric Properties of Barium Sodium Niobate

Singh, S.; Draegert, D.; Geusic, J. E.

doi:10.1103/physrevb.2.2709

Cited by 220 publications

(50 citation statements)

References 36 publications

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“…[20] Commensurate modulations are frequently observed in TTB-related structures due to octahedra tilt and/or cation order in the tunnels. [21][22][23] Initial attempts to describe the modulated TTB structure of the exchanged product observed by ED were made on the basis of orthorhombic supercells similar to those reported by Lin et al [24,25] A systematic study of the reciprocal lattice was carried out for a series of SAED patterns in different zone axes, which are depicted in Figure 4.…”

Section: Ed Characterizationmentioning

confidence: 99%

Proton and Deuteron Exchange in TTB‐Like Na_1.2Nb_1.2W_0.8O₆: Structural Characterization and Spectroscopic Study

et al. 2007

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Keywords: Materials science / Ion exchange / Electron diffraction / IR spectroscopy / Raman spectroscopy Proton-and deuteron-exchange reactions have been performed on Na 1.2 Nb 1.2 W 0.8 O 6 with the tetragonal tungsten bronze (TTB) structure. Na + /H + and Na + /D + ion exchange occurs when aqueous nitric acid solutions are used as the exchanging agent. Up to two out of the three Na + ions are readily exchanged to yield crystalline powder samples. The ionexchange reaction proceeds topotactically, in other words the basic TTB structure is retained, although X-ray and electron diffraction reveal that the exchange process produces an orthorhombic supercell which possesses a true unit cell based

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Section: Ed Characterizationmentioning

confidence: 99%

Proton and Deuteron Exchange in TTB‐Like Na_1.2Nb_1.2W_0.8O₆: Structural Characterization and Spectroscopic Study

et al. 2007

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“…By approximating n ~ and n] by Taylor's series to second order terms, we obtain for the variation of frequency for a given change in temperature (60)) 2 = tlfr computer generated graph of the variation of a signal and idler waveIengths with temperature predicted from equation 2 by using Published values of refractive index [10] and the actual phase matching temperature at degeneracy for the same barium sodium niobate crystal used to obtain the experimental temperature tuning curve in fig. 2.…”

Section: Np(t)/zp = N~(t)/z + Ni(t)/2imentioning

confidence: 99%

Prediction of the tuning characteristics of an optical parametric oscillator using parametric fluorescence

Laurence

Tittel

1971

Opto-electronics

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Knowledge of the tuning characteristics and generation efficiency of optical parametric fluorescence for a nonlinear crystal is of considerable help in defining the operational requirements of a tunable CW parametric oscillator. Detailed observations of the wavelength and temperature dependence of parametric fluorescence from crystals of barium sodium and lithium niobate are reported that extend for the first time to the infra-red. The merit of this approach is illustrated by comparing the temperature tuning curves of two operating argon pumped barium sodium niobate oscillators to the parametric fluorescence tuning curves of the same crystals.One of the main problems in the design of an optical parametric oscillator (OPO) is the determination of the operating characteristics of a specific nonlinear crystal, since the optical properties of individual crystals differ considerably. The purpose of this paper is to report details of utilising parametric fluorescence data to establish optimum operating conditions of parametric oscillators and to predict their frequency tuning characteristics. Although parametric fluorescence measurements have been reported by other workers [1][2][3][4][5] their observations usually do not extend to wavelengths beyond 700 nm. Therefore in order to establish operating conditions for both degenerate and nondegenerate parametric oscillators it was necessary to extend fluorescence measurements to the infra-red. It is particularly useful when computer techniques are used to relate experimental to theoretical tuning data, since this allows optimum choice of a specific parametric pump, material and resonant structure for a desired spectral range under permissible operating conditions. Parametric fluorescence measurements can also be used to measure the bandwidth and gain coefficient of the parametric oscillator since the fluorescence emission is due to the parametric gain generated within a crystal by an intense laser pump beam [6,7]. Hence, the conversion efficiency of the pump beam to low power fluorescence emission can be used as an indication of the available parametric gain of a potential parametric oscillator crystal. Therefore fluorescence measurements are helpful, in addition to a second harmonic generation test in selecting a specific nonlinear crystal for use in a parametric device.The experimental arrangement necessary for obtaining parametric fluorescence data conveniently is the same as that for a parametric oscillator and therefore requires no additional apparatus. The apparatus that was used is shown in fig. 1 consisting of a CW argon laser or frequency doubled Nd :YAG laser, the crystal under investigation and a monochromator-photomultiplier system complete with phase sensitive detection. Since single pass amplification of phase matched parametric fluorescence emission is sufficient for making observations, the need for a parametric cavity structure is eliminated

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“…Mixed oxides belonging to the tetragonal tungsten bronze structural type (TTB) are a technologically important family of materials because of their ferroelectric and highly nonlinear properties [1,2]. Ba 2 ANb 5 O 15 (A = K, Na, Li) mixed oxides are representative of TTB materials that can be considered a good alternative for the substitution of commercial piezoceramics by lead-free materials.…”

Section: Introductionmentioning

confidence: 99%

Mechanosynthesis of the ferroelectric materials Ba2ANb5O15 (A=K, Na, Li)

Khachane

Moure

Elaatmani

et al. 2006

Journal of Alloys and Compounds

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Optical and Ferroelectric Properties of Barium Sodium Niobate

Cited by 220 publications

References 36 publications

Proton and Deuteron Exchange in TTB‐Like Na_1.2Nb_1.2W_0.8O₆: Structural Characterization and Spectroscopic Study

Proton and Deuteron Exchange in TTB‐Like Na_1.2Nb_1.2W_0.8O₆: Structural Characterization and Spectroscopic Study

Prediction of the tuning characteristics of an optical parametric oscillator using parametric fluorescence

Mechanosynthesis of the ferroelectric materials Ba2ANb5O15 (A=K, Na, Li)

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Optical and Ferroelectric Properties of Barium Sodium Niobate

Cited by 220 publications

References 36 publications

Proton and Deuteron Exchange in TTB‐Like Na1.2Nb1.2W0.8O6: Structural Characterization and Spectroscopic Study

Proton and Deuteron Exchange in TTB‐Like Na1.2Nb1.2W0.8O6: Structural Characterization and Spectroscopic Study

Prediction of the tuning characteristics of an optical parametric oscillator using parametric fluorescence

Mechanosynthesis of the ferroelectric materials Ba2ANb5O15 (A=K, Na, Li)

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Proton and Deuteron Exchange in TTB‐Like Na_1.2Nb_1.2W_0.8O₆: Structural Characterization and Spectroscopic Study

Proton and Deuteron Exchange in TTB‐Like Na_1.2Nb_1.2W_0.8O₆: Structural Characterization and Spectroscopic Study