Journal
IEEE SENSORS JOURNAL
Volume 10, Issue 9, Pages 1415-1418Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2010.2042592
Keywords
Fiber modal interferometer; fiber-optic sensor; high-temperature sensor
Funding
- Natural Science Foundation of China [60607011, 90101024]
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We present a new fiber-optic high-temperature sensor based on a thin-core fiber (TCF) modal interferometer. A thin-core fiber, whose core radius is about half of the radius of a standard single-mode fiber (SMF), is inserted between standard SMFs to form an extremely simple in-fiber modal interferometer. The wavelength of the transmission dip increases linearly with the temperature. Experimental demonstration shows that it can be used to sense temperature up to 850 degrees C with a sensitivity of about 18.3 pm/degrees C.
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