Choudhury, Nilotpal and Dey, Nitai and Mandal, Ashok Kumar and Sen, Ranjan and Dhar, Anirban (2023) Investigation on porous aluminosilicate soot layer for fabrication of specialty optical fiber using VPCD technique. Ceramics International, 49 (9, A). pp. 14145-14154. ISSN 0272-8842

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Abstract

The basic investigation of aluminosilicate porous core layer deposited using Vapour Phase Chelate Delivery (VPCD) technique is presented to optimize soot deposition parameters for subsequent processing to develop specialty optical fiber. Different soot deposition parameters namely vapour phase composition and porous core layer deposition temperature were studied in order to evaluate the change of porous soot layer morphology in terms of average pore size, pore size distribution, and chemical composition with the objective of selecting the optimized aluminosilicate soot structure. The field emission scanning electron microscope (FESEM) investigation reveals that the average pore size of the aluminosilicate soot strongly depends on the selected deposition tem-perature and its value increases from 0.7 mu m to 1.8 mu m for increasing deposition temperature from 1150 degrees C to 1250 degrees C. This average pore size of aluminosilicate soot however, increases significantly with addition of dopants like GeO2 and P2O5 and reaches the value of 3.9 mu m and 5.8 mu m respectively. It is also observed that the aluminium deposition efficiency in porous aluminosilicate soot layer depends on selected deposition temperature and for an increase of 20 degrees C, the deposition efficiency of Aluminium in the soot layer increases by-2.7%. It is also observed that aluminium incorporation efficiency using direct VPCD technique reaches a value of-90% compared to 72% if the process carried out by following deposition of porous soot layer. The observed result could help to achieve better control over the VPCD technique and could be extended to fabricate rare earth doped specialty optical fiber of specific design.

Item Type:	Article
Subjects:	Processing Science
Divisions:	Fiber Optics and Photonics
Depositing User:	Bidhan Chaudhuri
Date Deposited:	06 Oct 2023 12:21
Last Modified:	06 Oct 2023 12:21
URI:	http://cgcri.csircentral.net/id/eprint/5577

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