FLEXIBLE TUBE HAVING A SMALL COEFFICIENT OF LINEAR EXPANSION, A METHOD OF MANUFACTURING IT, AND A DEVICE CONSTITUTING AN APPLICATION THEREOF

摘要

A tube for protecting and guiding an optical fiber is constituted by two tubes which are co-extruded and then stretched. The inner tube thus acquires a reduced coefficient of linear expansion, which is closer to that of glass. The outer tube protects the inner tube from fibrils appearing on its surface.