Dutta, Debjit and Dhar, Anirban and Kir'yanov, Alexander V and Das, Shyamal and Bysakh, Sandip and Paul, Mukul Chandra (2015) Fabrication and characterization of chromium-doped nanophase separated yttria-alumina-silica glass-based optical fibers. Physica Status Solidi A-Appications and Materials, 212 (8). pp. 1836-1844. ISSN 0031-8965

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The basic material and optical properties of chromium-doped nanophase-separated yttria-alumina-silica (YAS) glass based optical preforms and fibers, fabricated through the modified chemical vapor deposition process in conjunction with solution doping technique under suitable thermal annealing conditions are reported. The size of the phase-separated particles within the core of the annealed preform is around 20-30nm which is significantly reduced to around 5.0nm in the drawn fiber. The absorption spectra of fibers drawn from the annealed and non-annealed preform samples revealed the presence of Cr4+, Cr3+, and Cr6+ specie. Numerically, extinction of absorption drops approximate to 3-3.5 times for the annealed sample as a result of nano-phase restructuration during annealing process. Intense broadband emission (within 500-800nm) in case of the annealed preform sample is observed as compared to the non-annealed one and is associated with the presence of Cr3+ ions in nanostructured environment inside the YAS core glass. The final fibers show broadband emission ranging from 900 to 1400nm under pumping at 1064nm which is attributed mainly to the presence of Cr3+/Cr4+ ions. The fabricated fibers seem to be a potential candidate for the development of fiber laser sources for the visible and near-infra ranges and for effective Q-switching units for approximate to 1-1.1m all-fiber ytterbium lasers.

Item Type: Article
Subjects: Processing Science
Divisions: Fiber Optics and Photonics
Depositing User: Bidhan Chaudhuri
Date Deposited: 29 Dec 2015 11:28
Last Modified: 29 Dec 2015 11:28
URI: http://cgcri.csircentral.net/id/eprint/2979

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