Temperature-dependent Sellmeier coefficients and chromatic dispersions for some optical fiber glasses

Temperature-dependent Sellmeier coefficients are necessary to optimize optical design parameters of the optical fiber transmission system. These coefficients are calculated for fused silica (SiO/sub 2/), aluminosilicate, and Vycor glasses for the first time to find the temperature dependence of chromatic dispersion at any wavelength from UV to 1.7 /spl mu/m. The zero dispersion wavelength /spl lambda//sub 0/ (1.273 /spl mu/m for SiO/sub 2/, 1.393 /spl mu/m for aluminosilicate, and 1.265 /spl mu/m for Vycor glasses at 26/spl deg/C) varies linearly with temperature, and d/spl lambda//sub 0//dT is 0.03 nm/K for aluminosilicate and Vycor glasses, whereas for SiO/sub 2/ it is 0.025 nm/K. This study interprets the recently observed experimental value of d/spl lambda//sub 0//dT for two dispersion shifted optical fibers; and the dominantly material origin of d/spl lambda//sub 0//dT is confirmed here as a fundamental property of the optical fiber glasses.<
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