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  • 1
    Electronic Resource
    Electronic Resource
    Electro-optical properties of a single domain PbTiO3 crystal (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 2102-2106 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The electro-optic coefficient rc has been measured at low frequency in a single crystal of PbTiO3. Linear and quadratic polarization optic coefficients are derived from this value of rc and from the electric properties measured on the same crystal. Figures of merit for modulator application and the thermo-optic coefficient are determined in PbTiO3 and are compared with those in other electro-optic materials. Results show that PbTiO3 can be interesting for electro-optic applications. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.358853
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  • 2
    Electronic Resource
    Electronic Resource
    Electro-optic properties in pure LiNbO3 crystals from the congruent to the stoichiometric composition (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 84 (1998), S. 2251-2254 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report large and nonmonotonic dependences of the electro-optic (EO) coefficient r22 and the corresponding dielectric permittivity in pure LiNbO3 on the concentration of intrinsic defects related to the deviation from the stoichiometry of the crystal. This variation is caused mainly by the electro-mechanical contribution. A stoichiometric crystal possesses both large EO properties and resistance to optical damage which renders it much more suitable for use in laser Q-switching than the congruent crystal. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.368290
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  • 3
    Electronic Resource
    Electronic Resource
    Influence of the temperature-dependent spontaneous birefringence in the electro-optic measurements of LiNbO3 (1989)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 65 (1989), S. 2406-2408 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In spite of the large utilization of LiNbO3 in optical devices, its electro-optic coefficients are not perfectly known. We show in the present paper that not taking into account the temperature dependence of the linear spontaneous birefringence can lead to an erroneous determination of the electro-optic coefficients. The electro-optic coefficient rc of LiNbO3 has been determined by an accurate technique issued from the Sénarmont method. At room temperature, rc=19.9×10−12 m/V, with an estimated error of ±5%. The measurements are performed for values of the dc applied electric field as a function of the temperature around room temperature. We point out the drastic influence on the electro-optic response of the spontaneous birefringence variation due to the temperature. Accurate and reproducible values of the electro-optic coefficients are obtained only if this dependence is taken into account.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342809
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  • 4
    Electronic Resource
    Electronic Resource
    New material with strong electro-optic effect: Rubidium hydrogen selenate (RbHSeO4) (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 1920-1922 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A very large electro-optic Pockels coefficient is reported in a crystal of rubidium hydrogen selenate. This new material is found to be promising for modulation applications because of its very low half-wave voltage (∼27 V) which is determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.111742
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  • 5
    Electronic Resource
    Electronic Resource
    Study of contributions to temperature dependence of the phase shift in an electro-optic crystal (1997)
    Springer
    Optical and quantum electronics 29 (1997), S. 441-450 
    Details
    ISSN: 1572-817X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Abstract The spontaneous and electric field induced phase retardations have been measured as a function of temperature in a KDP crystal using an accurate method. The plots of these retardations versus temperature reveal unexpected undulations. We consider the various contributions which could be involved in these dependences, such as the thermo-optic effect, crystal dilatation and temperature dependence of the electro-optic coefficient. By means of calculations, the undulations are shown to be caused by an interference phenomenon related to light reflections on the surface of the crystal.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018547331718
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  • 6
    Electronic Resource
    Electronic Resource
    Unequal depolarization of the membrane of the rat diaphragm muscle fibres caused by veratrine (1985)
    Springer
    Pflügers Archiv 404 (1985), S. 45-49 
    Details
    ISSN: 1432-2013
    Keywords: Sensitiveness to potassium ; Unequal depolarization ; Veratrine ; Sodium channel
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The effect produced by veratrine on transmembrane potential was investigated in five distinct regions of the isolated rat diaphragm blocked with eitherd-tubocurarine or α-bungarotoxin. It was found that small (0.4μg/ml) and large (2.0μg/ml) doses of veratrine depolarize only two or three of these regions. With the use of a very large (10.0μg/ml) dose depolarization occured in all five regions of the diaphragm but the effect was much larger in those areas of the muscle fibre membrane which were selectively depolarized by the smaller ones. These results clearly indicate either an unequal distribution of sodium channels activated by veratrine or differences in sodium channel density in distinct areas of the muscle fibre membrane. Supersensitivity of veratrinized muscles to potassium was confirmed. However, the sensitiveness to the depolarizing action of potassium was only increased in the regions of the diaphragm partially depolarized by veratrine. This suggests that partial depolarization of the muscle fibre membrane was actually the cause of the supersensitivity. The possible involvement of potassium and of the unequal depolarization of the muscle fibre membrane in the veratrine response is considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00581489
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