Experimental setup for refractive index measurements using a modified Michelson-Morley interferometer (L1 and L2: lenses, M1 and M2: mirrors, BS: beam splitter).
Number of fringes as function of rotation angle measured at for GLSO and TeLi glasses. The curves are fits obtained using Eq. (1).
Room temperature refractive index and absorption as function of wavelength for (a) GLSO and (b) TeLi glasses. Solid line is a simulation using the data of Yayama et al. (Ref. 20). The dashed line is a fit using the single-effective oscillator model described in the text. The uncertainty in refractive index is .
Temperature coefficient of the optical path length as function of temperature for GLSO (a) and TeLi (b) glasses at different wavelengths. Lines are linear fits to the data.
(a) Temperature coefficient of the optical path length and (b) temperature coefficient of the refractive index as function of wavelength for GLSO (full circles) and TeLi (hollow circles) glasses at . Lines are shown as a guide to the eye.
Thermal electronic polarizability coefficient as function of wavelength for GLSO (full circles) and TeLi glasses (hollow circles) at . Lines are the fits obtained using Eq. (10).
(a) as a function of photon energy at different temperature of GLSO glass. The lines are fits obtained by using Eq. (11). (b) The electronic absorption edge as function of temperature by TeLi and GLSO glasses. Lines are linear fits to the data.
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