Journal of Materials Science

, Volume 51, Issue 22, pp 10245–10261 | Cite as

Ge- and Al-related point defects generated by gamma irradiation in nanostructured erbium-doped optical fiber preforms

  • M. León
  • M. Lancry
  • N. Ollier
  • B. H. Babu
  • L. Bigot
  • H. El Hamzaoui
  • I. Savelii
  • A. Pastouret
  • E. Burov
  • F. Trompier
  • B. Poumellec
  • M. Bouazaoui
Original Paper


Erbium-doped amplifiers (EDFAs) are of special interest for space applications. In this environment, the ionizing radiations decrease the gain of these optical amplifiers, due to the ionization of defects precursors, mainly linked to dopants as Germanium (Ge), Aluminum (Al), or Phosphorus (P). The aim of this work is to study the influence of the Ge and Al relative concentration on the radiation resistance of different nanostructured fiber preforms, manufactured by Modified Chemical Vapor Deposition (MCVD), in which various types of nanoparticles (Er@SiO2-NP, Al2O3-NP, and Er@Al2O3-NP) have been introduced in the silica matrix. The radiation resistance of these fibers has been compared with that of standard MCVD Er-doped preforms. All of them have been characterized by optical absorption and Electronic Paramagnetic Resonance (EPR) spectroscopies before and after irradiation with a total gamma dose of 5.9 kGy. EPR results show that Al-related defects are not observed in fiber preforms with Ge concentrations higher than 4.4 wt%. We also demonstrated that NP technology can limit the formation of Aluminum-Oxygen Hole Centers (AlOHCs), reducing the Radiation-Induced Attenuation at the energy of interest for EDFAs.


Fiber Preform Electron Paramagnetic Resonance Optical Absorption Band Paramagnetic Defect Modify Chemical Vapor Deposition 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors acknowledge the financial support of the French national research agency through the NANOFIBER project (ANR-12-RMNP-0019). This work was also partially supported by the Nord-Pas de Calais Regional Council and FEDER through the “Contrat de ProjetsEtat Region (CPER) 2007-2013,” the “Campus Intelligence Ambiante” (CIA), the FLUX Equipex Project (ANR-11-EQPX-0017), and the Labex CEMPI (ANR-11-LABX-0007).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer Science+Business Media New York 2016

Authors and Affiliations

  • M. León
    • 1
    • 2
  • M. Lancry
    • 1
  • N. Ollier
    • 2
  • B. H. Babu
    • 1
    • 2
  • L. Bigot
    • 3
  • H. El Hamzaoui
    • 3
  • I. Savelii
    • 3
  • A. Pastouret
    • 4
  • E. Burov
    • 4
  • F. Trompier
    • 5
  • B. Poumellec
    • 1
  • M. Bouazaoui
    • 3
  1. 1.Institut de Chimie Moléculaire et des Matériaux d’Orsay, UMR CNRS-UPSud 8182OrsayFrance
  2. 2.Laboratoire de solides irradiés (LSI), UMR 7642Ecole PolytechniquePalaiseau CedexFrance
  3. 3.Univ-Lille, CNRS, UMR 8523—PhLAM—Physique des Lasers AtomesetMoléculesLilleFrance
  4. 4.Draka Comteq France SAS, Parc des Industries Artois FlandresHaisnes CedexFrance
  5. 5.Institut de Radioprotection et de Sûreté Nucléaire (IRSN)Fontenay-Aux-RosesFrance

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