Large core Yb-doped optical fiber through vapor phase doping technique

Maitreyee Saha; Atasi Pal; Mrinmay Pal; Ranjan Sen

doi:10.1117/12.2017318

3 May 2013 Large core Yb-doped optical fiber through vapor phase doping technique

Maitreyee Saha, Atasi Pal, Mrinmay Pal, Ranjan Sen

Proceedings Volume 8775, Micro-structured and Specialty Optical Fibres II; 87750A (2013) https://doi.org/10.1117/12.2017318
Event: SPIE Optics + Optoelectronics, 2013, Prague, Czech Republic

Abstract

Rare earth (RE) doped optical fibers have shown tremendous progress for producing high power fiber lasers for industrial, medical and strategic applications. However, fabrication of large core, high Yb-doped fiber is still a challenge through conventional process due to poor repeatability and limitation regarding core size. This paper presents successful fabrication of Yb-doped fibers through vapor phase doping technique. Preform fabrication was carried out using a specially constructed MCVD system containing High Temperature Vapor Delivery Unit with sublimators for Al and Yb precursors. The novelty of the present work lies in deposition of Al₂O₃ and Yb₂O₃ in vapor phase simultaneously with silica during formation of sintered core layer which result in uniform dopants distribution in the preform. The fibers exhibited lasing efficiency of 76% with low ‘photodarkening effect’.

Citation Download Citation

Maitreyee Saha, Atasi Pal, Mrinmay Pal, and Ranjan Sen "Large core Yb-doped optical fiber through vapor phase doping technique", Proc. SPIE 8775, Micro-structured and Specialty Optical Fibres II, 87750A (3 May 2013); https://doi.org/10.1117/12.2017318

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