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A process for making rare earth doped optical fibre 发明授权

2023-04-03 4470 952K 0

专利信息

申请日期 2025-07-11 申请号 GB0318455
公开(公告)号 GB2388367B 公开(公告)日 2005-05-18
公开国别 GB 申请人省市代码 全国
申请人 MINISTRY OF INFORMATION TECHNO; COUNCIL SCIENT IND RES
简介 The present invention provides an improved process for making rare earth doped preforms and fibres by a combination of MCVD technique and solution doping method, said method comprising developing matched or depressed clad structure inside a silica glass substrate tube followed by deposition of unsintered particulate layer containing GeO2 and P2O5 for formation of the core and solution doping by soaking the porous soot layer into an alcoholic/aqueous solution of RE-salts containing co-dopants like AlCl3 / Al(NO3)3 in definite proportion, controlling the porosity of the soot, dipping period, strength of the solution and the proportion of the codopants to achieve the desired RE ion concentration in the core and minimise the core clad boundary defects and followed by drying, oxidation, dehydration and sintering of the RE containing porous deposit and collapsing at a high temperature to produce the preform and overladding with silica tubes of suitable dimensions and fibre drawing to produce fibres.


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