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SM ISO690:2012 SAVA, Bogdan Alexandru, BOROICA, Lucica, VASILIU, Ileana Cristina, SHIKIMAKA, Olga A., OANE, M., POPA (BIVOL), Mihaela. Nano-carbon doped boron-lead-phosphate glass. Obtaining and properties. In: Materials Science and Condensed Matter Physics, Ed. 9, 25-28 septembrie 2018, Chișinău. Chișinău, Republica Moldova: Institutul de Fizică Aplicată, 2018, Ediția 9, p. 98. |
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Materials Science and Condensed Matter Physics Ediția 9, 2018 |
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Conferința "International Conference on Materials Science and Condensed Matter Physics" 9, Chișinău, Moldova, 25-28 septembrie 2018 | |||||
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CZU: 539.196.2+544.032.4 | |||||
Pag. 98-98 | |||||
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Phosphosilicate glass doped with erbium are commonly used as active medium in fiber laser because it can be highly doped and efficiently absorb the pump light [1]. The issue using phosphosilicate glass-based erbium-doped fiber is high splicing loss along with high background loss of the fiber. Graphene oxide (GO), similar to graphene, exhibits saturable absorption [2], which makes it suitable for passive mode-locking of lasers. Thanks to high thermal and mechanical properties and to reproducible production technology, GO is a promising saturable absorber material for fiber lasers [1]. A simple, compact and low cost graphene-based mode-locked erbium-doped zirconia–yttria–aluminosilicate glass-based fiber laser was demonstrated [3]. The aim of present work is to make a step forward by obtaining nano-carbon NC (as nanographite or GO) composites within an rare earth-doped boron-lead-phosphate glass host. The boron-phosphate-based glass have many advantages, from whom the most important is enhanced luminescence and laser pumping together with higher level of dopants without quenching [4, 5]. Two methods were designed and tested to achieve this, first of them being the melting together, at low temperatures, of nano-carbon in doped boron-lead-phosphate glass. The second tested method comprise melting the host glass, grinding it at desired granulation, suited by introducing NC, and sintering the obtained composite. Targets for pulsed laser deposition - PLD and magnetron sputtering – MS were designed and obtained aiming at thin films deposition in next stages of this research. The obtained composites were investigated by using Fourier Transform Infrared - FTIR and Raman spectroscopy which demonstrated combined structure including meta-phosphate, boron Q2 units, B-O-P links together with [PbO4] groups. Scanning Electron Microscopy - SEM investigation showed the NC homogeneous repartition in the glass host and also the nano-dimensions of NC. Thermal and electrical properties were enhanced by the introduction of NC as demonstrated by several measurements. Mechanical properties were investigated and demonstrated the glass host lower properties comparatively to NC doped boron-lead-phosphate glass ones. |
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