Optical properties of sapphire fiber under high temperature

Linhua Ye; Zhongping Shen; Limin Tong; Yonghang Shen

doi:10.1117/12.470963

20 September 2002 Optical properties of sapphire fiber under high temperature

Linhua Ye, Zhongping Shen, Limin Tong, Yonghang Shen

Proceedings Volume 4919, Advanced Materials and Devices for Sensing and Imaging; (2002) https://doi.org/10.1117/12.470963
Event: Photonics Asia, 2002, Shanghai, China

Abstract

With a high melting point (over 2000°C), high transmission from ultraviolet to infrared wavelength approaching 4 μm, favorable mechanical strength and chemically inertness, the sapphire fiber is suitable for high temperature optical fiber sensor and near-infrared energy delivery. In this paper, the self-radiation and performance stability of sapphire fiber under high temperature was studied. Experiment results have shown that the self-radiation of sapphire fiber would influence the temperature measurement accuracy. The optical transmission loss increased with the time when the sapphire fiber was exposed to the high temperature environments. The most important factor that resulted in the performance deterioration was the direct contacting of the sapphire fiber with the protective tube and the dirtying of the evaporating substance. A suitable protective tube was applied to assure the performance stability. For further improvement of the optical properties of sapphire fiber, an alumina cladding is being developed to protect the sapphire fiber surface.

Citation Download Citation

Linhua Ye, Zhongping Shen, Limin Tong, and Yonghang Shen "Optical properties of sapphire fiber under high temperature", Proc. SPIE 4919, Advanced Materials and Devices for Sensing and Imaging, (20 September 2002); https://doi.org/10.1117/12.470963

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