Fabrication of sol-gel derived cladding for sapphire fibers and their performance evaluation under harsh environment

S. Bera; Y. N. Picard; M. Buric; B. Liu

doi:10.1117/12.2577815

5 March 2021 Fabrication of sol-gel derived cladding for sapphire fibers and their performance evaluation under harsh environment

S. Bera, Y. N. Picard, M. Buric, B. Liu

Author Affiliations +

Proceedings Volume 11682, Optical Components and Materials XVIII; 116820K (2021) https://doi.org/10.1117/12.2577815
Event: SPIE OPTO, 2021, Online Only

Abstract

Sapphire single crystal fibers have shown great potential in fiber-based high temperature sensing applications. As single crystals are grown without cladding, there have been a lot of different techniques that have been proposed to achieve a core-clad structured fiber. A common approach is to achieve this is by using sol-gel deposition where the cladding layer is grown on a crystal fiber via dip-coating and subsequent thermally treatment. In this work we describe the synthesis of magnesium aluminate spinel via sol-gel methods and application of it as a cladding material for sapphire crystal fibers. The thermal stability of spinel coatings on sapphire substrates is investigated as the formation of non-stoichiometric spinel at high temperature is well-documented. Sapphire fibers with the spinel cladding layers are tested under different gas atmosphere at elevated temperatures, to demonstrate the efficacy of spinel as a cladding layer.

Conference Presentation

Citation Download Citation

S. Bera, Y. N. Picard, M. Buric, and B. Liu "Fabrication of sol-gel derived cladding for sapphire fibers and their performance evaluation under harsh environment", Proc. SPIE 11682, Optical Components and Materials XVIII, 116820K (5 March 2021); https://doi.org/10.1117/12.2577815

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