Opto-Thermal Properties of Fibres using Digital Holographic Interferometry
نویسنده
چکیده
A hot stage attached to the phase shifting digital holographic interferometry (DHI) is used to study the effects of temperature on the optical properties of basalt fibres. The phase shifting Mach-Zehnder interferometer is used to obtain five phase-shifted holograms, in which the phase difference between two successive holograms is π/2. These holograms are numerically reconstructed using the convolution approach into amplitude and phase distributions. The obtained phase is used to calculate the refractive indices for light polarizing parallel and perpendicular to the fibre axis. The influence of temperature on the dispersion parameters, polarizabiliy per unit volume and dielectric susceptibility are obtained. The values of the dispersion and oscillation energies and Cauchy’s constants are provided at different temperatures. The obtained results show that DHI is seen to be useful new tool for studying opto-thermal properties of fibres.
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