Paul, Mukul Chandra and Kir'yanov, A V and Barmenkov, Yu O and Das, S and Pal, Mrinmay and Bhadra, Shyamal Kumar and Yoo, S and Boyland, A J and Sahu, J K and Martinez-Gamez, A and Lucio-Martinez, J L (2012) Yb2O3 Doped Yttrium-Alumino-Silicate Nano-Particles Based LMA Optical Fibers for High-Power Fiber Lasers. Journal of Lightwave Technology, 30 (13). pp. 2062-2068. ISSN 0733-8724

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Abstract

Yb2O3 doped yttrium-rich alumino-silicate nanoparticles based D-and P-(pentagonal) shaped optical fibers with core diameter similar to 30-35 mu m are fabricated using the conventional MCVD process and solution doping technique. Parameters of different stages of the fiber preforms fabrication are optimized to get uniform distributions of Al, Y, F, and Yb ions in the core region, ensured by the data of an EPMA analysis. In the presence of small amounts of fluorine, the size of nano-particles is maintained within 5-10 nm; the EDX data reveal that the nano-particles are rich in yttrium-alumino-silicate phase and are dispersed uniformly across the preforms core. The critical parameters of the processes involved at the fibers fabrication along with the nano-structuring and spectroscopic features are highlighted. It is shown experimentally that the drawn D- and P- shaped fibers support high laser efficiency (similar to 80% at 976-nm pumping) and demonstrate negligible photodarkening.

Item Type:	Article
Uncontrolled Keywords:	Fiber optics; Fiber lasers; Nanoparticles
Subjects:	Processing Science
Divisions:	Fiber Optics and Photonics
Depositing User:	Bidhan Chaudhuri
Date Deposited:	26 Jul 2012 10:56
Last Modified:	26 Jul 2012 10:56
URI:	http://cgcri.csircentral.net/id/eprint/1662

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