FIELD: physics, optics.
SUBSTANCE: invention relates to fibre-optics and can be used in making anisotropic single-mode fibre light guides. The method involves making a cylindrical workpiece by MCVD method, which has a core, a low-viscosity tensive cladding and a structural cladding. Two grooves are made at diametrically opposite sides of the workpiece, followed by high-temperature rounding of the workpiece and drawing of the fibre. The structural cladding consists of quartz glass doped with P2O5 and/or B2O3 and/or F additives in an amount which enables to lower the compression and rounding temperature by 100-150°C.
EFFECT: longer outer diameter of the workpiece, low mass transfer of the quartz glass and high efficiency of the process.
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