Abstract
The causes of the occurrence and the method of the elimination of defects of non-bridging oxygen in multimode fluorosilicate optical fibers prepared by the modified method of chemical vapor deposition are considered. The solution is the use of support tubes obtained by quartz surfacing in a hydrogen atmosphere. In this case, there is no absorption band in a range of 630 nm caused by nonbridging oxygen in the spectrum of optical losses of gradient fluorosilicate optical fibers of W-type. Attenuation in a visible spectrum range is mainly determined by the level of Rayleigh scattering and the mode dispersions at a wavelength of 342 and 683 nm are 1.2 ± 0.1 and 0.7 ± 0.2 ps/m, respectively.
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