Title :
Fabrication of Tm2O3/Al2O3-silica preform by improved MCVD-chelate delivery system
Author :
Mat-Sharif, K.A. ; Omar, Nasr Y. M. ; Hanif, S. ; Zulkifli, M.I. ; Muhamad-Yassin, S.Z. ; Yusoff, A. ; Zubair, H.T. ; Aljamimi, S.M. ; Yusoff, Z. ; Abdul-Rashid, H.A. ; Tamchek, N.
Author_Institution :
Photonic Lab., Telekom R&D, Cyberjaya, Malaysia
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.
Keywords :
alumina; chemical vapour deposition; electron probe analysis; optical fibre fabrication; preforms; refractive index; silicon compounds; soot; thulium compounds; EPMA; MCVD-chelate delivery system; Tm2O3-Al2O3-SiO2; Tm2O3/Al2O3-silica preform; fabrication techniques; flow design; refractive index profiler; simultaneous soot-dopant deposition; stepwise soot-dopant deposition; temperature gradient; Doping; Fabrication; Indexes; Metals; Preforms; Refractive index; Silicon compounds; EPMA; MCVD; metal chelate; rare earth doped silica; refractive index;
Conference_Titel :
Photonics (ICP), 2014 IEEE 5th International Conference on
Conference_Location :
Kuala Lumpur
DOI :
10.1109/ICP.2014.7002329
