We present a miniaturized optical fiber tip Fabry-Perot interferometer for high-temperature measurement based on a concave-shaped cavity. The fabrication process of the diaphragm-free Fabry-Perot cavity is quite simple, involving only two steps: fusion splicing and cleaving. By adjusting the arc power during fusion splicing, a concave-shaped structure is obtained, through which the light is coupled/split into the wall of the spliced hollow core fiber. By cleaving the end-face of the hollow-core fiber, a concave-shaped diaphragm-free Fabry-Perot interferometer is formed. The temperature response of the sensor was demonstrated, showing a high-temperature tolerance up to 1000 °C and a sensitivity of 0.01226 nm/°C. The proposed sensor, with all-silica-structure, high compactness, robustness, and ease of fabrication, could find wide applications in high-temperature harsh environments.
- Cable jointing,
- Cavity resonators,
- Composite structures,
- Diaphragms,
- Fiber optic sensors,
- High temperature applications,
- Optical fiber fabrication,
- Optical fibers,
- Silica,
- Structure (composition),
- Temperature measurement,
- Temperature sensors,
- Wave interference,
- Extrinsic Fabry Perot interferometer,
- Fabrication process,
- Fiber gratings,
- High temperature,
- High temperature measurement,
- High temperature sensors,
- Hollow core fiber,
- Temperature response,
- Fabry-Perot interferometers,
- Extrinsic Fabry-Perot interferometer,
- High-temperature,
- Optical fiber sensor
Available at: http://works.bepress.com/jie-huang/105/