Abstract
The development of new active optical fibre devices requires materials with « augmented » intrinsic properties, though using luminescent ion (LI) –doped silica as host glass. Optical fibers containing dielectric nanoparticles (DNP) grown by phase separation are proposed. DNP would optimally fully encapsulate LI to produce « engineered » spectroscopic properties. To determine the composition of DNP, Secondary Ion Mass Spectrometry imaging at high spatial resolution is employed. Through the use of this technique, we demonstrate without ambiguity the partition of Mg, P and Er in DNP. By increasing Mg concentration, Si concentration in DNP decreases, which explains the spectroscopic behaviour of Er.
Highlights
Silica glass as a fiber host material has proved to be very attractive for developing efficient fiber amplifiers and high-power fiber lasers [1]
Through the use of this technique, we demonstrate without ambiguity the partition of Mg, P and Er in Dielectric Nanoparticles (DNP)
By increasing Mg concentration, Si concentration in DNP decreases, which explains the spectroscopic behaviour of Er
Summary
Silica glass as a fiber host material has proved to be very attractive for developing efficient fiber amplifiers and high-power fiber lasers [1]. We used Secondary Ion Mass Spectrometry (SIMS) imaging, a surface analysis technique, to investigate the composition of the DNP localized in the fiber core. This technique has been successfully applied previously to determine the distribution of elements in homogeneous fibers [9]. The Nanosims50L [10,11,12] instrument utilized in this study combines analysis at high spatial resolution (35 nm) with the simultaneous detection of up to 7 secondary ions sputtered from the same probed nano-volume This makes the Nanosims50L suitable to investigate heterogeneous materials such as nanoparticle-doped fibers. When increasing the Mg concentration, the Si concentration in DNP decreases, which helps explain the spectroscopic behavior of Er
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