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Fiber-Optic High-Temperature Sensor Based on Thin-Core Fiber Modal Interferometer
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DOI：10.1109/JSEN.2010.2042592.png)
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Abstract
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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.
Keywords:
Fiber modal interferometer
fiber-optic sensor
high-temperature sensor
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