Abstract
Optical properties of chalcogenide glasses belonging to the series (80GeS2–20Ga2S3)100−x (CsCl) x with x=0;5;10;15;20 were investigated. The linear refractive indices (n 0) were determined by prism measurements at four wavelengths: 633 nm, 825 nm, 1311 nm, and 1511 nm. Z-scan experiments were performed at 800 nm to measure the non-linear indices (n 2) and the absorption coefficients (β). CsCl additions in the base glass (80GeS2–20Ga2S3) are characterized by a white shift of the transmission in the visible range and a strong decrease of both n 0 and n 2. As the same time, β is also decreasing and this results in a figure of merit FOM=2βλ/n 2 that remains relatively low at 800 nm, meaning that this series of highly non-linear glasses should be very suitable for optical switching applications at telecommunication wavelengths.
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This work was supported the European Commission within the Interreg IVA programme (CleanTech project), the Institut of Research in Industrial Environment (IRENI), and the MRCT/CNRS within the multidisciplinary research program of the Réseau Optique et Photonique.
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Masselin, P., Le Coq, D., Calvez, L. et al. CsCl effect on the optical properties of the 80GeS2–20Ga2S3 base glass. Appl. Phys. A 106, 697–702 (2012). https://doi.org/10.1007/s00339-011-6668-6
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DOI: https://doi.org/10.1007/s00339-011-6668-6