A Multi-Groove Ceramic-Packaged Sapphire-Diaphragm Fiber Sensor for High-Temperature Vibration
Abstract
A sapphire-diaphragm fiber-optic vibration sensor for high-temperature applications is proposed and experimentally demonstrated. Its sensing unit consists solely of a monolithic sapphire sensitive diaphragm encapsulated in a multi-groove ceramic housing, forming a stable Fabry-Pérot interferometer. Experimental shows that the sensor achieves reliable vibration measurements up to 10 g across a temperature range of 17°C to 800°C, with a room-temperature sensitivity of 5.18 nm/g and a resonant frequency of 9.65 kHz. After being subjected to a 237 g impact at room temperature, the amplitude–frequency response error within the 20-3000 Hz band remains approximately 6.2%. Experimental results demonstrate that the sensor features a compact structure and robust performance, offering a reliable solution for vibration monitoring in harsh environments.
Fields of Study & Subjects
Advanced Sensor Technologies Research
Electrical and Thermal Properties of Materials
Advanced Fiber Optic Sensors
Publication details
- Journal / source
- IEEE photonics journal
- Publisher
- Institute of Electrical and Electronics Engineers (IEEE)
- Volume
- 18
- Issue
- 3
- Pages
- 6801706–6801706
- Publication date
- 4 May 2026
- Language
- EN