We present, for the first time to our knowledge, a microwave interrogated sapphire fiber Michelson interferometer for high temperature sensing. By sending a microwave-modulated optical wave to a sapphire fiber Michelson interferometer, a high quality interference spectrum was reconstructed in the microwave domain with a fringe visibility exceeding 40 dB. The sensor showed good sensitivity, reversibility and stability in the temperature range of 100 °C-1400 °C. The proposed sensing configuration has a number of unique advantages including low dependence to the multimodal influences, high signal quality, relieved fabrication precision, and insensitivity to the background blackbody radiation when used in high temperature.
National Energy Technology Laboratory (U.S.)
- Fibers,
- Interferometers,
- Michelson interferometers,
- Microwaves,
- Optical fiber fabrication,
- Optical fibers,
- Sapphire,
- Visibility,
- Black body radiation,
- Fringe visibilities,
- High-temperature sensing,
- Interference spectrum,
- Microwave domains,
- Microwave interferometer,
- Microwave Photonics,
- Sensing configuration,
- Temperature sensors,
- Optical carrier based microwave interferometer,
- Sapphire optical fiber
Available at: http://works.bepress.com/jie-huang/60/
The work was supported by the U.S. Department of Energy, National Energy Technology Laboratory, Morgantown, WV, USA, under Award DE-FE0001127 and Award DE-FE0012272.