Recent developments in As-S glass fibres

Recent developments in As-S glass fibres showed that increase in degree of purity of As-S glasses allowed optical fibres to be fabricated with minimum optical losses of multimode optical fibres 23-45 dB/km at 2.2-2.7 mu m, 50 -70 dB/km at 3.2-3.6 mu m, 200-300 dB/km at 4.1-4.7 mu m and 300-500 dB/km at 5.0-5.5 mu m. The bending strength of optical fibres with diameter of 40 0 mu m increased from similar to 0.5 to >1.2 GPa. Core and clad glass compo sitions were As40S60 and As38S62, respectively. (C) 1999 Elsevier Science B .V. All rights reserved.