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Volume 4, Issue 4 (Suppl) J Laser Opt Photonics, an open access journal
ISSN: 2469-410X Optics 2017
November 15-17, 2017
November 15-17, 2017 | Las Vegas, USA
8th International Conference and Exhibition on
Lasers, Optics & Photonics
Ytterbiumand bismuth clusters impact on silica-based light guides optical and luminescence performances
Evgeny Savelyev and Konstantin M Golant
Kotel’nikov Institute of Radio-Engineering and Electronics-RAS, Russia
Yb3+ ions in silica are powerhouses for single mode fiber lasers yielding kilowatts CW output powers at a wavelength near
one micrometer. Bismuth in silica fibers features with a wide band luminescence (from 1 to 2 microns), which is topical for
applications particularly in telecom systems. There is a guide to suppose that small-size, bismuth clusters are mainly responsible for
the near-infrared luminescence and lasing in Bi-doped silica. A possibility to increase concentration of active species in the core
glass of the lightguide is a very important condition for obtaining effective waveguide or fiber lasers and amplifiers. Nevertheless,
such increasing may yield the formation of clusters. The dynamic pattern of clustering depends on mutual solubility of oxides, host
glass composition, concentration of an activator and preparation technology of the solid solution. Clustering causes quenching of the
metastable state excitation responsible for lasing and adds to the optical waveguide scattering loss. In this communication, we present
the results of experimental study of optical loss and luminescence performances of Yb3+ ions and bismuth in optical waveguides
purpose made from fused and unfused silica vie the SPCVD technology. Glasses having different contents of Yb, Al, P, Bi, B and Ge
additives have been studied. As the result, a relationship between spectral-luminescent properties of the samples, structure and sizes
of the clusters in them have been found.
Biography
Evgeny Savelyev graduated from Lomonosov Moscow State University with a degree in Physics in 2012. He has completed his Post-graduate courses from Kotel’nikov
Institute of Radio-Engineering and Electronics of RAS in 2016. The primary subject of his current research is clustering of different activators in silica-based glasses and
the influence of the clusters on optical and spectral-luminescent properties of active lightguides. He has talked about the outcomes of his research at various internal and
international conferences. He is the co-author of several articles recently published in the Optical Materials Express and Optical Materials.
Evgeny Savelyev et al., J Laser Opt Photonics 2017, 4:4 (Suppl)
DOI: 10.4172/2469-410X-C1-017