Abstract: A method of connecting optical fibers coated with conductive layer, preferably metalized, with metal elements, comprising the following stages: 1. preparing the electrolyte, 2. clearing the optical fiber surface and clearing the electrodes, 3. placing the optical fiber and the metal sensor element in the electrolyzer, 4. enabling flow of electricity, 5. cleaning the elements—the optical fiber element bonded to the metal element.

Abstract: Fibre coupler for creation of optical fibre-containing interferometers (sensors), with at least two parallel optical fibres placed in an enclosure characterized in that each of the optical fibres consists of at least three alternately placed light-conductive sections with different coatings, at least one (1) of which has a melting point above 200° C., and the two corresponding sections (2) with coating other than with a melting point above 200° C. are coupled using any known method. Interferometer containing above described fibre couplers, where the fibre couplers are interconnected by at least two optical fibre sections (8, 9) with a high temperature-resistant coating.

Abstract: A method and apparatus for identifying at least one characteristic of at least one optical link of an optical network. The method comprises modulating a predetermined optical channel with a predetermined frequency component, and transmitting the modulated predetermined optical channel onto an optical waveguide at a predetermined power such that at least one optical data channel co-propagating along the optical waveguide with the modulated predetermined optical channel is modulated with the predetermined frequency component.