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Experimental setup for the measurement of . and are the intensities of the transmitted light whose polarization directions are perpendicular and parallel, respectively, to that of the incident light.
(a) measured at . (b) Expansion of (a) around 1540 nm at 30, 50, 70, and . (c) Temperature dependence of the peak wavelength around 1540 nm. Triangles and reverse triangles represent experimental data obtained when the temperature increases and decreases, respectively. Solid curve is a guide to the eyes.
Temperature dependence of the degree of birefringence around 1540 nm normalized to that at . Triangles (△) and reverse triangles (▽) represent experimental data, while squares (◻) and circles (○) represent calculated values based on Bruggeman and LLL models, respectively. Solid curves are guides to the eyes.
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