Determination of the composition of lithium tantalate crystals by zero-birefringence measurements

Bäumer, Ch.; Berben, D.; Buse, K.; Hesse, H.; Imbrock, J.
April 2003
Applied Physics Letters;4/7/2003, Vol. 82 Issue 14, p2248
Academic Journal
We present an approach to determine the exact composition of lithium tantalate (LiTaO[sub 3]) crystals by measuring the temperature where the birefringence disappears. Various samples with compositions ranging from the congruently melting to the stoichiometric one have been prepared by vapor transport equilibration treatments and are investigated. The sensitivity is as high as 1.5°C/0.01 mol% Li[sub 2]O. The relative accuracy is better than 0.01 mol%, while the absolute accuracy is limited by the calibration.


Related Articles

  • The electrical properties of ferroelectric LiTaO3 and its solid solutions. Huanosta, A.; West, A. R. // Journal of Applied Physics;6/15/1987, Vol. 61 Issue 12, p5386 

    Discusses the electrical properties of ferroelectric LiTaO[sub3] and its solid solutions. Background on LiTaO[sub3]; Reagents used in the experiments; Technique for characterizing the electrical properties of lithium tantalate ferroelectric ceramics as a function of temperature.

  • Domain reversal and nonstoichiometry in lithium tantalate. Kim, Sungwon; Gopalan, Venkatraman; Kitamura, K.; Furukawa, Y. // Journal of Applied Physics;9/15/2001, Vol. 90 Issue 6 

    Recent studies have shown that lithium nonstoichiometry has a tremendous influence on domain reversal characteristics in ferroelectric lithium tantalate. This work presents a systematic study of the domain reversal characteristics such as threshold coercive fields for domain reversal, domain...

  • Low-loss optical waveguides in lithium tantalate by vapor diffusion. Eknoyan, O.; Yoon, D. W.; Taylor, H. F. // Applied Physics Letters;8/10/1987, Vol. 51 Issue 6, p384 

    Planar and channel optical waveguides have been produced in Y-cut LiTaO3 substrates by zinc diffusion from the gaseous phase at 800 °C. Prism coupler measurements on planar waveguides diffused for 6 h indicate effective index changes of 0.0063 and 0.0033 for TE and TM polarizations,...

  • Properties of proton exchange waveguides in lithium tantalate. Matthews, Paul J.; Mickelson, Alan R.; Novak, Steven W. // Journal of Applied Physics;10/1/1992, Vol. 72 Issue 7, p2562 

    Investigates the characteristics and properties of proton exchange and annealed proton exchange waveguides in lithium tantalate. Information on planar waveguide studies; Channel waveguides.

  • Metastable phases in H[sub x] Li[sub 1-x] TaO[sub 3] waveguide layers and pure LiTaO[sub 3]. Atuchin, V.V.; Dimova-Malinovska, D.; Grigorieva, T.I.; Kalabin, I.E.; Savatinova, I.; Savova, I.; Spesivtsev, E.V.; Tonchev, S.; Ziling, C.C. // Applied Physics B: Lasers & Optics;2001, Vol. 73 Issue 5/6, p559 

    The formation of high-temperature phases in low-doped H:LiTaO[sub 3] waveguide layers in Z-cut LiTaO[sub 3] has been observed both by refractive-index and IR-spectra measurements. This permits us to correlate the index jumps to the changes of the OH bonds in the crystal lattice. Reversible phase...

  • Second-order optical non-linearity of proton exchanged lithium tantalate waveguides. Korkishko, Y.N.; Fedorov, V.A.; Alkaev, A.N.; Laurell, F. // Applied Physics B: Lasers & Optics;2001, Vol. 73 Issue 5/6, p519 

    A detailed correlation between the fabrication conditions, crystallographic phase state of H[sub x] Li[sub 1-x] TaO[sub 3] waveguides and second-order optical non-linearity has been investigated by using reflected SHG measurements from the polished waveguide end face. The non-linearity, strongly...

  • Observation of internal field in LiTaO[sub 3] single crystals: Its origin and time-temperature.... Gopalan, Venkatraman; Gupta, Mool C. // Applied Physics Letters;2/12/1996, Vol. 68 Issue 7, p888 

    Examines the internal field of lithium tantalate crystals. Correlation between the thickness, surface removal and internal field of the crystal; Measurement of direct current conductivity as a function of temperature; Discussion on the possible origins of internal field based on point defect...

  • Composition dependence of the ultraviolet absorption edge in lithium tantalate. Bäumer, Ch.; David, C.; Tunyagi, A.; Betzler, K.; Hesse, H.; Krätzig, E.; Wöhlecke, M. // Journal of Applied Physics;3/1/2003, Vol. 93 Issue 5, p3102 

    Comprehensive preparations of lithium tantalate crystals with compositions ranging from the congruent to stoichiometric ones have been carried out. Vapor transport equilibration treatments were used to determine the composition of the samples with an absolute accuracy of 0.05 mol %. This...

  • Thermally stimulated luminescence from vapor-transport-equilibrated LiTaO[sub 3] crystals. Chirila, M. M.; Garces, N. Y.; Halliburton, L. E.; Evans, D. R.; Route, R. K.; Fejer, M. M. // Journal of Applied Physics;7/1/2003, Vol. 94 Issue 1, p301 

    Thermally stimulated luminescence (TSL), optical absorption, and electron paramagnetic resonance (EPR) have been used to characterize the emission of ultraviolet light from undoped LiTaO[sub 3]. The crystals in this study were grown from a congruent melt and then subjected to a...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics