Preparation and investigation of Ga x Ge 25 As 15 Se 60-x (x = 1 ÷ 5) glasses

Shiryaev, V.S.; Karaksina, E.V.; Velmuzhov, А.P.; Суханов, М. В.; Kotereva, Т.V.; Plekhovich, А.D.; Чурбанов, М. Ф.; Filatov, A.I.

doi:10.1016/j.optmat.2017.03.024

Cited by 11 publications

(1 citation statement)

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“…%, that is, the Dy 3+ ‐doped Ge 25 As 9 Ga 1 Se 65 glass, the dominating crystalline phase was a monoclinic GeSe 2 as here and not the Ga‐related crystalline phase (modified fcc α‐Ga 2 Se 3 , see Figure ) more normally observed in some as‐prepared or post‐reheated Dy 3+ ‐doped Ge–As–Ga–Se glasses, nor the RE‐related crystal (PrSe 1.9 ) found in Pr 3+ ‐doped Ge–As–Ga–Se glass, as reported in our previous work. Although it should be noted that GeSe 2 crystals have been reported to grow in undoped Ge–As–Ga–Se glass and Pr 3+ ‐doped Ge–Sb–Se–Ga–I glass, this is the first‐time observation that GeSe 2 has been found to be the dominating crystalline phase in a RE‐doped Ge–As–Ga–Se glass system.…”

Section: Resultsmentioning

confidence: 70%

Low gallium‐content, dysprosium III‐doped, Ge–As–Ga–Se chalcogenide glasses for active mid‐infrared fiber optics

et al. 2018

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A systematic investigation is presented, for the first time, of a 1000 ppmw (parts per million, by weight) Dy 3+ -doped Ge-As-Ga-Se chalcogenide glass series, with a fixed low Ga content of 1 atomic% (at. %), suitable for active mid-infrared fiber optics. Seven glasses constitute the series, which have increasing average coordination number from 2.49 to 2.61, in steps of 0.02, with the GeSe 2 , As 2 Se 3 , and Ga 2 Se 3 stoichiometries kept. Glass formation is confirmed using X-ray diffraction and differential scanning calorimetry. Fourier transform infrared spectroscopy is reported for the series. Parallel plate viscometry enables prediction of fiber-drawing temperatures and, with differential thermal analysis, determines the potential for fiber fabrication. X-ray diffraction of samples after parallel-plate viscometry shows that Ge 25 As 9 Ga 1 Se 65 (at. %) alone, in the glass-series, devitrifies to form the single-crystalline phase: monoclinic-GeSe 2 ; scanning electron microscope imaging suggests that this phase is both surface and bulk grown. Overall, the recommended host glass at. % compositions for doping with rare-earth ions and drawing to active mid-infrared fiber are

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