SINGLE-MODE ELECTROOPTICAL FIBRE AND METHOD FOR THE PRODUCTION THEREOF

摘要

The inventive single-mode electrooptical fibre and a method for the production thereof relate to optical engineering and can be used for data transmitting and processing systems. Fibres exhibiting an improved electrooptical effect are made of glass whose Kerr constant is 1.5 orders greater than that of a quartz glass and provided with a specified clad layer and core profiles. Said fibre consists of a core (8), light-transmitting clad layer (9), light absorbing clad layer (11) provided with light absorbing elements (12) and current conductive electrodes (13) which are disposed in said clad layer (11) in such a way that they form different geometrical patterns. The inventive method consists in drawing individual glass tubes from glass rods in the form of the fibre parts, assembling hexagonal or square-shaped packets including the electrode (13) placing in said packets along the cross section thereof, subsequently drawing a preform in the range of 1 to several millimetres and in overdrawing said preform into a fibre whose diameter ranges from 50 to 250 mkm with simultaneous application of a polymeric coating. Said invention increases the electrooptical effect of a fibre and simplifies a fibre drawing process.