Dhar, Anirban and Das, Shyamal and Maiti, Himadri Sekhar and Sen, Ranjan (2010) Fabrication of high aluminium containing rare-earth doped fiber without core-clad interface defects. OPTICS COMMUNICATIONS, 283 (11). pp. 2344-2349. ISSN 0030-4018

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The unwanted core-clad interface defect generation and related scattering loss in rare-earth doped optical fibers containing Al-oxide is up to now an unsolved problem as it cannot be avoided without modifying fiber design or composition. Here a simple technique is proposed to eliminate the problem without affecting fiber parameters. The method comprises addition of fumed silica in appropriate amount under dispersed condition to the soaking solution containing Al and rare-earth salts during the solution impregnation stage. This facilitates the networking between Al(2)O(3) and SiO(2) during sintering. The method leads to an improvement in optical properties of the fibers and enables doping of high concentration of Al-oxide even in presence of GeO(2) in the core. (C) 2010 Elsevier B.V. All rights reserved.

Item Type: Article
Uncontrolled Keywords: Erbium doped silica glass; Optical fibers; MCVD process; Solution doping technique; Fumed silica dispersion
Subjects: Ceramic-Metal Systems
Depositing User: Bidhan Chaudhuri
Date Deposited: 09 Feb 2012 11:31
Last Modified: 09 Feb 2012 11:31
URI: http://cgcri.csircentral.net/id/eprint/725

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