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1.8–13 μm supercontinuum generation by pumping at normal dispersion regime of As–Se–Te glass fiber
Author(s) -
Wu Zhihao,
Yang Lei,
Xu Yinsheng,
Zhang Peiqing,
Nie Qiuhua,
Wang Xunsi
Publication year - 2019
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.16516
Subject(s) - supercontinuum , materials science , refractive index , fiber , dispersion (optics) , optical fiber , optics , flatness (cosmology) , graded index fiber , all silica fiber , dispersion shifted fiber , photonic crystal fiber , optoelectronics , fiber optic sensor , composite material , physics , cosmology , quantum mechanics
Mid‐infrared (MIR) band supercontinuum (SC) light source has highly important application prospects in aerospace, biomedicine, MIR sensing, and pollutant monitoring. As–Se–Te glass has high nonlinear refractive index, wide MIR transmission range and weak crystallization ability. As 40 Se 40 Te 20 glass fiber is suitable for producing wide MIR–SC spectrum. In this study, purified As 40 Se 40 Te 20 glass was prepared and unclad and step‐index fibers were drawn. An unclad As 40 Se 40 Te 20 glass fiber with minimum loss of 1.7 dB/m at 8.8 μm was obtained. By pumping the unclad fiber in the normal dispersion region at 5 μm, we recorded the broadest SC generation spectrum, which covered 1.8–13 μm with a 30 dB spectral flatness, from a fiber with 15 cm length. Besides, As 40 Se 40 Te 20 /As 40 Se 42 Te 18 step‐index fiber with minimum loss of 5.6 dB/m at 5 μm was drawn from isolation extruded preform. The step‐index fiber was pumped in the normal dispersion region at 5 μm, and the SC spectrum, covering 2.1–11.2 μm with a 40 dB spectral flatness, was recorded from a fiber with 15 cm length. The SC spectrum, which was achieved by pumping the As 40 Se 40 Te 20 fiber, covered almost all the transparent range of material.