Kir'yanov, A V and Siddiki, S H and Barmenkov, Y O and Das, S and Dutta, D and Dhar, A and Khakhalin, A V and Sholokhov, E M and Il'ichev, N N and Didenko, S I and Paul, Mukul Chandra
(2017)
Hafnia-yttria-alumina-silica based optical fibers with diminished mid-IR (> 2 mu m) loss.
Optical Materials Express, 7 (7).
pp. 2511-2518.
ISSN 2159-3930
Abstract
Fabrication details and basic characteristics of a set of novel multimode hafniayttria- alumina-silicate (HYAS) core-glass based fibers, one of which is co-doped with bismuth (Bi), for the mid-IR (> 2 mu m) spectral range are reported. It is demonstrated that fibers of this type possess low fundamental loss in the spectral range beyond 2 mu m, lowered by fewer times as compared to conventional silica-based ones, even at moderate (units of mol.%) co-doping with hafnium. This makes them attractive for versatile mid-IR applications. Furthermore, HYAS core-glass fiber co-doped with Bi is revealed to have all the signs of `active' (fluorescing) Bi-related centers, thus being suitable for lasing/amplifying in the nearIR spectral range. (C) 2017 Optical Society of America
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