Solution doped preform with improved uniformity and concentration using dual-layer soot deposition

•Solution doped optical fibre preform couple with MCVD is fabricated.•A conventional single-layer is compared with dual-layer soot deposition.•The dual layer soot improves the dopant uptake.•The dual layer soot improves the dopant uniformity. A new method of soot deposition to improve the characteri...

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Bibliographic Details
Published in:	Optical fiber technology Vol. 28; pp. 23 - 27
Main Authors:	Muhd-Yassin, S.Z., Omar, Nasr Y.M., Mat-Sharif, K.A., Zulkifli, M.I., Safar, M.H., Aljamimi, S.M., Yusoff, Z., Emami, S.D., Paul, M.C., Abdul-Rashid, H.A.
Format:	Journal Article
Language:	English
Published:	Elsevier Inc 01-03-2016
Subjects:	MCVD Optical fibre Porous silica Solution doping technique Uniformity MCVD Optical fibre Porous silica Solution doping technique Uniformity
Online Access:	Get full text
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Summary:	•Solution doped optical fibre preform couple with MCVD is fabricated.•A conventional single-layer is compared with dual-layer soot deposition.•The dual layer soot improves the dopant uptake.•The dual layer soot improves the dopant uniformity. A new method of soot deposition to improve the characteristics of a solution-doped optical fibre preform is reported. The soot was generated using a modified chemical vapour deposition (MCVD) technique. A better longitudinal uniformity of the core refractive index profile and a higher degree of dopant incorporation were obtained when two layers of soot were deposited in the core. These improvements were further extended by depositing each layer at different temperatures. A variation of 0.15×10−2 (%RSD 3.5%) in the refractive index difference along 23cm of the preform and a core-to-cladding refractive index difference of approximately 0.012 were achieved using a 1.2M AlCl3 solution.
ISSN:	1068-5200 1095-9912
DOI:	10.1016/j.yofte.2016.01.003