Abstract: A system serves to monitor a body exposed to high mechanical or thermal stress. The body has a surface that has at least one groove with two groove lateral walls which are oppositely disposed and adjacent to the surface. An optical waveguide devoid of protective coating, which has a light-guiding core and a casing surrounding it and in which at least one sensor is provided for the optical detection of a measurement variable, is embedded in the groove. The optical waveguide is fixed in place in an area of one of the groove lateral walls, which is adjacent to the surface, by means of at least one caulking.

Abstract: The invention describes a transmission component for producing chromatic dispersion which can be predetermined, having a glass fiber optical waveguide in which it is possible to carry not only the LP01 fundamental mode but also at least one LPmn mode, and two pairs of Bragg gratings (gratings 1 and 2, as well as 3 and 4), of which at least one pair has chirped Bragg gratings, in which the first Bragg grating in each pair reflects the arriving light beam back to the other Bragg grating in a direction approximately opposite the incidence direction, and from which other Bragg grating the light beam emerges in, or at least parallel to, the original incidence direction.