Abstract

A highly sensitive temperature sensor was made by use of a side-hole glass fiber filled with indium metal, and its optical properties were investigated. The temperature sensitivity of the fiber-optic temperature sensor was dλ/dT=7.38nm/K. The temperature sensitivity was also examined in sensors made by different lengths of the side-hole fiber and the indium-filled fiber region. The temperature sensitivity could be varied in the range of 1.83 to 7.38nm/K by changing the relative length between the side-hole fiber and the indium-filled fiber region.

© 2013 Optical Society of America

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