Glass Physics and Chemistry

, Volume 44, Issue 2, pp 137–144 | Cite as

Phase Separation and Crystallization of Phosphate–Silicate Glass Cores of Preforms of Fiber Optics

  • L. D. Iskhakova
  • F. O. Milovich
  • D. Yu. Erin
  • V. V. Vel’miskin
  • S. L. Semenov
Materials of the International Conference “Glass: Science and Practice 2017”


The phase separation and the emergence of nanocrystalline inclusions in phosphate–silicate preforms for optical fibers activated with ytterbium, which are obtained by the powder sintering methods with the vibrational mixing of the melt and the addition of ytterbium-containing nanoparticles into preforms, are studied. Nanocrystals of YbPO4, SiO2, and YbP3O9 are formed in the preforms in the low-temperature areas of the powder sintering process when using either of the methods. It is concluded that the phosphates are crystallized as a result of the phase separation from the glass phase enriched with ytterbium.


ytterbium phosphate–silicate glass nanocrystal phase separation optical fiber 


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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  • L. D. Iskhakova
    • 1
  • F. O. Milovich
    • 1
  • D. Yu. Erin
    • 1
  • V. V. Vel’miskin
    • 1
  • S. L. Semenov
    • 1
  1. 1.Fiber Optics Research CenterRussian Academy of SciencesMoscowRussia

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