Abstract A double-pumped parametric amplifier where stimulated Brillouin scattering is suppressed... more Abstract A double-pumped parametric amplifier where stimulated Brillouin scattering is suppressed by applying a strain distribution along the fibre plus a low-frequency (140 MHz) pump phase modulation is presented. The good performance of the amplifier, confirmed by eye measurements at 10 Gbit/s, indicates that the method of straining fibres to eliminate completely SBS may be effectively implemented, improving these devices.
ABSTRACT In this letter we investigate the thermo-elastic mismatch in lanthanum strontium cobalt ... more ABSTRACT In this letter we investigate the thermo-elastic mismatch in lanthanum strontium cobalt ferrite (La0.6Sr0.4Co0.2Fe0.8O3−δ) (LSCF) films deposited onto yttria stabilized zirconia (YSZ) substrates, applicable to solid oxide fuel cells. We investigated composite LSCF+YSZ and pure LSCF films deposited onto commercial YSZ substrate. Photoacoustics was used to obtain the effective thermal diffusivity and thermal expansion coefficient of the two-layers samples. Based on a thermal–electrical analogy model, it was possible to get the thermo-elastic properties of the films and to confirm the desired reduction on the thermo-elastic mismatch between film and substrate when comparing composite LSCF+YSZ and pure LSCF films.
Tailoring the properties of magnetic vortices through the preparation of structured multilayers i... more Tailoring the properties of magnetic vortices through the preparation of structured multilayers is discussed. The dependence of the vortex core radius r on the effective anisotropy is derived within a simple model, which agrees with our simulations. As the perpendicular anisotropy increases, r also increases until a perpendicular magnetization appears in the disk rim. Co/Pt multilayer disks were studied; x-ray
Abstract A double-pumped parametric amplifier where stimulated Brillouin scattering is suppressed... more Abstract A double-pumped parametric amplifier where stimulated Brillouin scattering is suppressed by applying a strain distribution along the fibre plus a low-frequency (140 MHz) pump phase modulation is presented. The good performance of the amplifier, confirmed by eye measurements at 10 Gbit/s, indicates that the method of straining fibres to eliminate completely SBS may be effectively implemented, improving these devices.
ABSTRACT In this letter we investigate the thermo-elastic mismatch in lanthanum strontium cobalt ... more ABSTRACT In this letter we investigate the thermo-elastic mismatch in lanthanum strontium cobalt ferrite (La0.6Sr0.4Co0.2Fe0.8O3−δ) (LSCF) films deposited onto yttria stabilized zirconia (YSZ) substrates, applicable to solid oxide fuel cells. We investigated composite LSCF+YSZ and pure LSCF films deposited onto commercial YSZ substrate. Photoacoustics was used to obtain the effective thermal diffusivity and thermal expansion coefficient of the two-layers samples. Based on a thermal–electrical analogy model, it was possible to get the thermo-elastic properties of the films and to confirm the desired reduction on the thermo-elastic mismatch between film and substrate when comparing composite LSCF+YSZ and pure LSCF films.
Tailoring the properties of magnetic vortices through the preparation of structured multilayers i... more Tailoring the properties of magnetic vortices through the preparation of structured multilayers is discussed. The dependence of the vortex core radius r on the effective anisotropy is derived within a simple model, which agrees with our simulations. As the perpendicular anisotropy increases, r also increases until a perpendicular magnetization appears in the disk rim. Co/Pt multilayer disks were studied; x-ray
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