Over the past two decades, the demand of Rare Earth (RE) doped optical fibres has increased enormously for their applications in the field of optical amplifier, fibre laser and sensors. In this context, there is a growing need to improve the fibre performance and produce the fibres more reproducibly. The Modified Chemical Vapor Deposition (MCVD) process coupled with solution doping method is commonly employed to produce the preform and fibres due to greater flexibility of the process. However, control of RE concentration and the doping non-uniformity still continue to be the major problems...