Special pure germanium-rich Ga-Ge-As-Se glasses for active mid-IR fiber optics. (November 2018)

• Record Type: Journal Article
• Authors: Shiryaev, V.S.; Karaksina, E.V.; Churbanov, M.F.; Kotereva, T.V.; Stepanov, B.S.; Ketkova, L.A.; Evdokimov, I.I.; Koltashev, V.V.; Plotnichenko, V.G.; Filatov, A.I.; Antonov, I.N.
• Is Part Of: Materials research bulletin. Volume 107(2018)
• Page Start: 430
• Page End: 437
• Publication Date: 2018-11
• Subjects: Chalcogenide Ga-Ge-As-Se glasses -- Preparation -- Transmission -- Microstructure -- Refractive index -- Fiber; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2018.08.009
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Special pure Gax Ge25 As15 Se60-x (x = 0; 1; 2; 3; 4; 5) glasses were prepared and investigated. The glasses have high glass transition temperature (>320 °C) and low tendency to crystallization. The microstructure, the transmission region and the linear refractive index of glasses were studied. Dispersion optical parameters of glasses were calculated using the Wemple-DiDomenico model. For the first time, a single-index Ga3 Ge25 As15 Se57 glass fiber was fabricated and investigated. Abstract: Special pure Gax Ge25 As15 Se60-x (x = 0; 1; 2; 3; 4; 5) glasses were prepared using various methods for purification of the glass-forming melt. The glasses are characterized by high transparency in the spectral range 0.8–15 μm, low impurity content, high glass transition temperature (>320 °C), and low tendency to crystallization. The microstructure, the transmission range edges, the optical band-gap energy, and the linear refractive index of the glasses are studied. The refractive index of Gax Ge25 As15 Se60-x (x = 0÷5) glasses measured by ellipsometry increases with the substitution of selenium by gallium. It is for the first time that a single-index Ga3 Ge25 As15 Se57 glass fiber was fabricated, its minimum optical loss was about 0.6 dB/m at a wavelength of 6.7 μm. High-purity germanium-rich Ga-Ge-As-Se glasses were shown to be a promising material for active mid-IR fiber optics.