Fiber optic high-temperature thermometer using sapphire fiber

Yizheng Zhu; Zhengyu Huang; Ming Han; Fabin Shen; Gary Pickrell; Anbo Wang

doi:10.1117/12.575595

8 December 2004 Fiber optic high-temperature thermometer using sapphire fiber

Yizheng Zhu, Zhengyu Huang, Ming Han, Fabin Shen, Gary Pickrell, Anbo Wang

Proceedings Volume 5590, Sensors for Harsh Environments; (2004) https://doi.org/10.1117/12.575595
Event: Optics East, 2004, Philadelphia, Pennsylvania, United States

Abstract

Sapphire (single crystal alumina) has superior optical and mechanical properties. With a very high melting point of about 2050°C, sapphire fiber is an excellent candidate in optical fiber sensing area for high-temperature measurements. This paper presents a new type of sapphire-fiber-based extrinsic Fabry-Perot interferometric (EFPI) temperature sensor. The spectral interference pattern is generated by a sapphire diaphragm placed in front of the sapphire fiber. The sensing element is interrogated by a white-light source. Temperature is demodulated from the spectral change of interference pattern. Prototype sensor is tested at high temperature up to 1545°C. Both theoretical and experimental analysis are presented. Preliminary data shows the sensor is very promising for measuring ultra-high temperature.

Citation Download Citation

Yizheng Zhu, Zhengyu Huang, Ming Han, Fabin Shen, Gary Pickrell, and Anbo Wang "Fiber optic high-temperature thermometer using sapphire fiber", Proc. SPIE 5590, Sensors for Harsh Environments, (8 December 2004); https://doi.org/10.1117/12.575595

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