FIELD: physics, optics.
SUBSTANCE: invention relates to the field of fibre optics and can be used in fibre communication lines, and also for creation of physical sensors. The device contains a light waveguide core from quartz or from quartz doped with nitrogen, reflecting shell from quartz doped with fluorine, round weighting rods from quartz doped with boron, in the shell from pure quartz or from quartz doped with fluorine, and protective and strengthening polymeric coat. The weighting rods are located at the distance from the centre of the light waveguide core to the shell of weighting rods, equal or greater than diameter of the light waveguide core.
EFFECT: improvement of radiation stability of the light waveguide and avoidance of diffusion of impurities forming radiative centres of colouring from weighting rods into the protective shell.
1 dwg
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