| 摘要 |
PCT No. PCT/SE95/00265 Sec. 371 Date Jan. 10, 1997 Sec. 102(e) Date Jan. 10, 1997 PCT Filed Mar. 15, 1995 PCT Pub. No. WO95/25258 PCT Pub. Date Sep. 21, 1995An optical fiber (7) exhibits varying transmission characteristics in different strain states and can have an S-shaped microbend. For producing such a fiber it is heated locally in a small region, as viewed in the longitudinal direction of the fiber, and then the portions of the fiber (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 fiber. It can be performed in a conventional fusion-splicing apparatus for optical fibers. Alternatively, a laser can be used as a heating source, what is particularly suitable for processing optical fibers having longitudinal cavities in order to infer to it similar transmission characteristics. The optical fibers produced by this method are suited for use as sensors, e.g. strain gauges. |
