Optimization of draw processing parameters for As2Se3 glass fiber

As2Se3 glass fibers measuring 250 μm in diameter were fabricated based on different draw processing parameters, including preform dropping temperatures (T1 = Tg + ΔT, ΔT = 20, 30, 40, 50 °C), fiber-drawing temperatures (T2 = Tg + ΔT, ΔT = 10, 20, 50 °C), and drawing speeds. Raman spectra indicated crystallization on fiber surface at high temperatures. After fiber drawing, oxygen was detected on fiber surface by energy dispersive X-ray spectra. High-quality fiber with minimum loss of 1.88 dB/m (at 9.05 µm) was achieved under optimal dropping temperature of 218.1 °C (Tg + 30 °C), fiber-drawing temperature of 208.1 °C (Tg + 20 °C), and drawing speed of 0.10 m/min.