Ultra-high-temperature sensor based on sapphire fiber Bragg grating

Jia He; He Li; Xizhen Xu; Jun He; Changrui Liao; Yiping Wang

doi:10.1117/12.2654961

15 December 2022 Ultra-high-temperature sensor based on sapphire fiber Bragg grating

Jia He, He Li, Xizhen Xu, Jun He, Changrui Liao, Yiping Wang

Proceedings Volume 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022); 124784K (2022) https://doi.org/10.1117/12.2654961
Event: Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 2022, Xi'an, China

Abstract

The measurement of ultra-high temperatures is crucial for making meaningful advancements in the aerospace and power industries. Single-crystal sapphire fibers are desirable for the fabrication of ultra-high temperature sensors due to its high melting temperature of 2045 °C. Sapphire fiber Bragg gratings (SFBGs) suffer from a significant deterioration in their spectra following an ultra-high temperature exposure due to high-temperature oxidation. Here, an ultra-high-temperature sensor based on SFBG created by femtosecond laser inscription and inert gas-sealed packaging is proposed and demonstrated. The SFBG high-temperature sensor consists of a sapphire tube infiltrated with argon gas and an SFBG inscribed with a femtosecond laser line-by-line technique. Moreover, a standard FC/APC connector was set up at the end of the sapphire tube. The ultra-high temperature sensor was isothermally annealed for 55 hours at 1600 °C. Furthermore, the long-term thermal stability and temperature response of the sensors was evaluated, and then Savitzky-Golay smoothing and interpolation of the reflection spectrum were utilized to increase the accuracy in detecting the peak wavelength. It has been found that the stabilized ultra-high-temperature sensor can withstand temperatures up to 1600 °C for up to 20 hours. Furthermore, a third-order polynomial fitted to the response was used for calibrating the sensor from room temperature to 1800 °C. Additionally, its temperature sensitivity at 1800°C was 41.9 pm/°C. These results make it eminently suitable for utilization for ultra-high temperature measurements in power, smelting, and aviation industries.

Citation Download Citation

Jia He, He Li, Xizhen Xu, Jun He, Changrui Liao, and Yiping Wang "Ultra-high-temperature sensor based on sapphire fiber Bragg grating", Proc. SPIE 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 124784K (15 December 2022); https://doi.org/10.1117/12.2654961

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
5 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Sensors

Sapphire

Temperature sensors

Fiber Bragg gratings

Packaging

Femtosecond phenomena

Reflection

Show All Keywords

Keywords/Phrases

Search In:

Publication Years