title: Measuring opto-thermal parameters of basalt fibers using digital holographic microscopy.
abstract: A method for studying the effect of temperature on the optical properties of basalt fiber is presented. It is based on recording a set of phase-shifted digital holograms for the sample under the test. The holograms are obtained utilizing a system based on Mach-Zehnder interferometer, where the fiber sample inserted in an immersion liquid is placed within a temperature controlled chamber. From the recorded digital holograms the optical path differences which are used to calculate the refractive indices are determined. The accuracy in the measurement of refractive indices is in the range of 4 × 10-4. The influence of temperature on the dispersion parameters, polarizability per unit volume and dielectric susceptibility are also obtained. Moreover, the values of dispersion and oscillation energies and Cauchy's constants are provided at different temperatures.
authors.affiliation: Department of Physics, Faculty of Science, Aswan University, 81511, Aswan, Egypt.|Department of Physics, Faculty of Science for Girls, King Khalid University, Kingdom of Saudi Arabia.
authors.forename: Khaled M
authors.initials: KM
authors.lastname: Yassien
authors.affiliation: Department of Physics, Faculty of Science, Aswan University, 81511, Aswan, Egypt.|Optical metrology and optoelectronic systems, BIAS-Bremer Institut für angewandte Strahltechnik, Klagenfurter Str. 2, 28359, Bremen, Germany.
authors.forename: Mostafa
authors.identifier: http://orcid.org/0000-0001-6524-3984
authors.initials: M
authors.lastname: Agour
keywords: basalt fibres; birefringence; digital holographic microscopy; dispersion; refractive index