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Effects of the Weak Absorption Tail on the Transmission Loss of Ge–Sb–Se Optical Fibers
Author(s) -
Jin Chung Woon,
Je Park Bong,
Seok Seo Hong,
Tae Ahn Joon,
Lee MyungHyun,
Choi Yong Gyu
Publication year - 2005
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/j.1551-2916.2005.00300.x
Subject(s) - attenuation , materials science , absorption (acoustics) , rayleigh scattering , selenide , transmission loss , band gap , optical fiber , glass fiber , analytical chemistry (journal) , optics , chemistry , optoelectronics , composite material , selenium , metallurgy , physics , chromatography
Selenide glass optical fibers were fabricated for Ge 30 Sb 10 Se 58 S 2 and Ge 20 Sb 10 Se 70 glasses. Their transmission loss has been measured and compared with the theoretical attenuation loss that was calculated taking into account the electronic transition absorption, Rayleigh scattering, and multiphonon absorption. A low attenuation loss of the Ge 20 Sb 10 Se 70 glass composition in 1.2–1.7 μm range has been expected due to its high optical band gap energy compared with the Ge 30 Sb 10 Se 58 S 2 glass. However, the measured attenuation loss of the Ge 30 Sb 10 Se 58 S 2 glass fiber was ∼13 dB/m at 1.5 μm while Ge 20 Sb 10 Se 70 glass showed ∼82 dB/m. An enhanced weak absorption tail due to the localized states of the Ge 20 Sb 10 Se 70 glass was responsible for this behavior. Structural defects are related to the localized states and discussed for the present glass compositions.