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Dispersion in BeF2 glass lightguides

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It has been predicted that BeF2-based glasses will have an intrinsic loss 3 times lower than the SiO2-based glasses used in fiber applications today.1 A BeF2-based glass system has been identified for light guidance applications. With variation in Pb substitution for Ca in the 30KF–(15−x) CaF2−xPbF2–10AIF3–45BeF2 one can achieve a N. A. of up to 0.43. Material dispersion can be shifted with changes in Pb concentration so that the material dispersion zero wavelength ranges from 1.256 to 1.518 μm.

© 1986 Optical Society of America

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