FIELD: fiber optics. SUBSTANCE: invention relates to fiber communication lines and construction of physical parameter transducers (fiber pressure and temperature sensors, gyroscopes, etc.). Starting cylinder light guide semifinished part is manufactured from material with melting point equal to that of quartz glass and light guiding thread from material with melting point below that of quartz glass. When drawing light guide from semifinished part with etching holes the latter are left unfilled. EFFECT: reduced laboriousness of manufacture of light guides and improved characteristic resulting in reduction of emission loss and also reduced intermode polarization link in light guide. 3 cl, 4 dwg
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