Optical fiber fabrication using novel gas-phase deposition technique

We report a highly versatile chemical-in-crucible preform fabrication technique suitable for gas-phase deposition of doped optical fibers. Aluminosilicate and ytterbium-doped phosphosilicate fibers are presented demonstrating the technique and its potential for realizing complex fiber designs that are suitable for the next generation of high-power fiber devices. The results show aluminum-doped fiber with numerical aperture of 0.28 and ytterbium-doped fiber with a measured slope efficiency of 84% with respect to pump launch power

Breakdown of dipole approximation and its effect on high harmonic generation

Here, we present a study of high-harmonic-generation using the model system of polyacetylene when irradiated with intense laser-field. The system is prepared in a time-periodic Floquet-state. Only odd-order harmonics are obtained within dipole approximation due to the dynamical-symmetry of the Floquet-state. However, odd as well as even-order harmonics are obtained in case of beyond-dipole approximation. Dipole approximation is expected to be valid when the electron during oscillation is confined to a very small region compared to the wavelength of light. However, it is found that the dipole approximation breaks down even if the electron remains delocalised over a region less than 1 nm

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Not AvailableEffect of zinc supplementation on growth, reproductive performance, immune and endocrine response in grower pigs.Not Availabl

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Not AvailableIn-Vitro effect of some plant extracts on Buffalo Leech, Hirudinariamanillensis.Not Availabl