25 April 2012 Active material for fiber core made by powder-in-tube method: subsequent homogenization by means of stack-and-draw technique
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Abstract
A procedure for the preparation of optically homogeneous glass for fiber preforms through sintering of coarse oxide particles and further processing of the resultant glass, including several drawing and stacking steps, is described. Reducing the pressure to 10-2 Torr during sintering considerably reduced the amount of gas bubbles in Yb/Al-doped silica glass and decreased the background loss to 100 dB/km after the third drawing-stacking-consolidation cycle. For comparison, a fiber singly doped with alumina was fabricated by the same procedure as above. The level of wavelength- independent losses in that fiber was 65 dB/km.
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Vladimir V. Velmiskin, Vladimir V. Velmiskin, Olga N. Egorova, Olga N. Egorova, Vladimir Mishkin, Vladimir Mishkin, Konstantin Nishchev, Konstantin Nishchev, Sergey L. Semjonov, Sergey L. Semjonov, } "Active material for fiber core made by powder-in-tube method: subsequent homogenization by means of stack-and-draw technique", Proc. SPIE 8426, Microstructured and Specialty Optical Fibres, 84260I (25 April 2012); doi: 10.1117/12.922188; https://doi.org/10.1117/12.922188
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