Citation
Mat Sharif, Khairul Anuar and Omar, Nasr Y. M. and Safar, Mohd. Hanif and Zulkifli, Mohd Imran and Muhamad Yassin, Shahrin Zen and Yusoff, Ashaari and Tarif, Zubair Hassan and Aljamimi, Salah Mohammed and Yusoff, Zulfadzli and Abdul Rashid, Hairul Azhar and Tamchek, Nizam
(2014)
Fabrication of Tm2O3/Al2O3-silica preform by improved MCVD-chelate delivery system.
In: 5th International Conference on Photonics (ICP 2014), 2-4 Sept. 2014, Palace of the Golden Horses, Kuala Lumpur, Malaysia. (pp. 119-122).
Abstract
The fabrication of Tm/Al-doped silica preforms by an improved MCVD method with metal chelate precursors is discussed. Two fabrication techniques are employed, namely; simultaneous soot-dopant deposition (or standard MCVD) and stepwise soot-dopant deposition. The preforms are characterized by refractive index profiler and EPMA. The results show that the stepwise soot-dopant technique has a higher incorporation of Al2O3 and Tm2O3 as compared to the simultaneous soot-dopant method. This is due to the drawbacks of our chelate delivery system such as the temperature gradient and flow design. For the stepwise technique, the measured index difference of the preform is 0.006 with 0.8 wt% (maximum) Tm incorporated in the core.
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