Abstract

The evolution with time of optical transmission of chalcogenide microstructured optical fibers has been studied. Microstructured optical fibers with “grapefruit” geometry (six holes) have been prepared from four glass compositions (Te₂₀As₃₀Se₅₀, As₃₈Se₆₂, Ge₁₀As₂₂Se₆₈, and As₄₀S₆₀). Optical aging has been investigated by means of attenuation measurements carried out for each fiber. Fibers were stored in air between measurements. Transmission spectra show absorption bands due to O-H bonds and molecular water. Aging kinetics vary with glass compositions. For As₄₀S₆₀ glass, the O-H absorption band appears 2 h after the drawing step, while for Te₂₀As₃₀Se₅₀ glass that band is observed after an aging period as long as 21 months.

© 2014 IEEE

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