| 摘要 |
<p>An optical fibre (7) exhibits varying transmission characteristics in different strain states and can have an S-shaped microbend. For producing such a fibre it is heated locally in a small region, as viewed in the longidutinal direction of the fibre, and then the portions of the fibre (1) located at the two sides of the heated region are displaced in relation to each other in a transverse direction in relation to the longitudinal direction of the fibre. It can be performed in a conventional fusion-splicing apparatus for optical fibres. Alternatively, a laser can be used as a heating source, what is particularly suitable for processing optical fibres having longitudinal cavities in order to infer to it similar transmission characteristics. The optical fibres produced by this method are suited for use as sensors, e.g. strain gauges.</p> |
