Glass ceramic ferrules composed of SiO2-Al2O3-Li2O-MgO-TiO2-ZrO2-K2O-Z
nO-BaO have been fabricated by a preform drawing process. These ferrul
es show good dui ability in hot and humid conditions and when immersed
in water. A glass ceramic ferrule is the most suitable ferrule to rea
lise low cost optical connector for fibre to the home.