1. Sapphire Fabry-Perot high-temperature sensor study
- Author
-
Liang Wei-long, Gui Xinwang, Fan Dian, and Yao Yi-qiang
- Subjects
Optical fiber ,Materials science ,business.industry ,02 engineering and technology ,01 natural sciences ,Temperature measurement ,law.invention ,010309 optics ,Interferometry ,020210 optoelectronics & photonics ,Optics ,Band-pass filter ,law ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Sapphire ,Astronomical interferometer ,business ,Waveguide ,Fabry–Pérot interferometer - Abstract
A new structure sapphire fiber Fabry-Perot (F-P) high-temperature sensor based on sapphire wafer was proposed and fabricated. The sensor uses the sapphire fiber as a transmission waveguide, the sapphire wafer as an Fabry-Perot (F-P) interferometer and the new structure of "Zirconia ferrule-Zirconia tube" as the sensor fixing structure of the sensor. The reflection spectrum of the interferometer was demodulated by a serial of data processing including FIR bandpass filter, FFT (Fast Fourier Transformation) estimation and LSE (least squares estimation) compensation to obtain more precise OPD. Temperature measurement range is from 20 to 1000°C in experiment. The experimental results show that the sensor has the advantages of small size, low cost, simple fabrication and high repeatability. It can be applied for long-term, stable and high-precision high temperature measurement in harsh environments.
- Published
- 2017