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Structured active fiber fabrication and characterization of a chemically high‐purified Dy 3+ ‐doped chalcogenide glass
Author(s) -
Xiao Xusheng,
Xu Yantao,
Cui Jian,
Liu Xiaogang,
Cui Xiaoxia,
Wang Xunsi,
Dai Shixun,
Guo Haitao
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.16921
Subject(s) - materials science , doping , cladding (metalworking) , chalcogenide , analytical chemistry (journal) , glass fiber , fabrication , fiber laser , chalcogenide glass , fiber , optoelectronics , composite material , chemistry , chromatography , medicine , alternative medicine , pathology
By conventional melt‐quenching techniques, a series of Dy 3+ ‐doped (0.1 to 1.0 wt%) Ga 5 Ge 20 Sb 15 S 60 bulk glasses were fabricated and their potential for developing mid‐infrared fiber laser beyond 4 μm were evaluated, in which the optimal Dy 3+ doping concentration was found to be 0.3 wt% and the largest laser quality factor value ( σ e × τ mea = 2.62 × 10 −23 cm 2 s) among all of the Dy 3+ ‐doped chalcogenide glass was obtained. On this basis, through using the chemical purification methods with chlorine gas combined with the dynamic distillation process, the high‐purity GGSS glasses with low O–H and S–H absorptions were successfully fabricated, which was confirmed by the optimized mid‐infrared linear transmittance and improved fluorescent lifetimes of Dy 3+ : 6 H 13/2 , 6 H 11/2 levels. Furthermore, for the first time to the best of our knowledge, the Dy 3+ ‐doped, single‐mode, and double‐cladding chalcogenide fibers with the core/cladding ratios of 125:60:11 and 125:66:11.5 were achieved by a multistage rod‐in‐tube fiber drawing process and extrusion methods, respectively. The GeS 2 ‐based fiber exhibits excellent transmission performance at 1.0‐5.0 μm: 3.0 dB/m at 2.9 μm (O–H), 2.4 dB/m at 4.1 μm (S–H). Combining the advantages of high‐purity, high doping concentration and single‐mode double‐cladding structure, the optimized active fiber should be an ideal efficient and low‐threshold medium toward mid‐infrared fiber laser beyond 4 μm.