Direct observations of compositional changes of sub-20-nm Er-doped phase-separated nanoparticles in optical fibers (Conference Presentation)

Wilfried Blanc; Isabelle Martin; Hugues François Saint-Cyr; Xavier Bidault; Stéphane Chaussedent; Chrystel Hombourger; Philippe Le Coustumer; Sabrina Lacomme; Daniel R. Neuville; David J. Larson; Ty J. Prosa; Christelle Guillermier

doi:10.1117/12.2514239

5 March 2019 Direct observations of compositional changes of sub-20-nm Er-doped phase-separated nanoparticles in optical fibers (Conference Presentation)

Wilfried Blanc, Isabelle Martin, Hugues François Saint-Cyr, Xavier Bidault, Stéphane Chaussedent, Chrystel Hombourger, Philippe Le Coustumer, Sabrina Lacomme, Daniel R. Neuville, David J. Larson, Ty J. Prosa, Christelle Guillermier

Author Affiliations +

Proceedings Volume 10914, Optical Components and Materials XVI; 109140Q (2019) https://doi.org/10.1117/12.2514239
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

The study of amorphous phase-separated Dielectric Nano-Particles (DNPs) smaller than 10 nm is a great challenge for the materials community. In conjunction with Transmission Electron Microscopy (TEM) and Electron-Probe Micro-Analysis (EPMA), we took advantage of a recent technology, Tri-Dimensional (3D) Atom Probe Tomography (APT) to investigate the variations of the chemical composition in sub-20-nm oxide nanoparticles, grown in silicate glass through heat treatments, at their early stages of nucleation. More precisely, we are investigating the core of an optical fiber drawn from a preform prepared according to the Modified Chemical Vapor Deposition (MCVD) process. We provide here a comprehensive set of experimental data obtained from direct measurements of the concentration for P, Mg, Ge and Er within amorphous dielectric nanoparticles (DNP) of radii ranging from 1 nm to 10 nm. We report on an increase of the concentration of Mg and P with the size of the DNPs. Most importantly, we also demonstrate that erbium ions are partitioned in these small DNPs and their environment changes with the size of the nanoparticles. Molecular dynamics simulations were also implemented to discuss the structural modifications of the Er environment. This presentation highlights the trade off on the size of the DNPs: smaller to reduce light scattering vs bigger to modify luminescence properties.

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Wilfried Blanc, Isabelle Martin, Hugues François Saint-Cyr, Xavier Bidault, Stéphane Chaussedent, Chrystel Hombourger, Philippe Le Coustumer, Sabrina Lacomme, Daniel R. Neuville, David J. Larson, Ty J. Prosa, and Christelle Guillermier "Direct observations of compositional changes of sub-20-nm Er-doped phase-separated nanoparticles in optical fibers (Conference Presentation)", Proc. SPIE 10914, Optical Components and Materials XVI, 109140Q (5 March 2019); https://doi.org/10.1117/12.2514239

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KEYWORDS

Nanoparticles

Optical fibers

Erbium

Dielectrics

Magnesium

Transmission electron microscopy

Chemical species

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