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23 May 2006 Improvement of radiation resistance of multimode silica-core holey fibers
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Initial and radiation-induced optical loss spectra of multimode pure-silica-core holey fibers drawn at different regimes are analyzed and compared with those of a conventional POD-fiber with the same KU-1 silica in the core. It is shown that by filling the holes with H2 gas during fiber drawing, it is possible to fully suppress the drawing-induced 630 nm absorption band and to lower the amplitude of the radiation-induced 610 nm absorption band. The results of an experiment are discussed in which H2 gas was conducted through the holes of a multimode pure-silica-core holey fiber immediately in the process of its γ-irradiation. The dose evolution of the 610 nm absorption band and of the short-wavelength (≤ 550 nm) absorption associated with hydrogen incorporation into the glass network is analyzed. It is concluded that H2 gas is efficient at suppressing the 610 nm band in pure-silica-core holey fibers, but can cause a loss increase in the short-wavelength region, in case its pressure in the holes is not sufficiently high.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
A. F. Kosolapov, S. L. Semjonov, and A. L. Tomashuk "Improvement of radiation resistance of multimode silica-core holey fibers", Proc. SPIE 6193, Reliability of Optical Fiber Components, Devices, Systems, and Networks III, 61931E (23 May 2006);

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