FIELD: physics.
SUBSTANCE: according to the first version of the device, the light guide has a core with a high refraction index owing to doping of quartz glass and bending regions lying symmetrically about the diameter of the light guide which form birefringence. According to the second version of the device, the light guide has a core with a high refraction index owing to doping of quartz glass and having a elliptic shape in the cross-section. The dopant used is nitrogen in concentration range of 0.01-10 atom %.
EFFECT: high radiation resistance of a fibre-optic guide which supports linear polarisation.
2 cl, 2 dwg
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