Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 25, Issue 9, Pages 829-832Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2013.2252336
Keywords
Fiber optic sensors; fiber tapers; temperature sensors
Funding
- National Natural Science Foundation of China [90923037, 91123027, 61137001]
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A highly sensitive temperature sensor based on the liquid-sealed S fiber taper (SFT) in a capillary is proposed and experimentally demonstrated. The temperature independent SFT is turned into a sensitive temperature sensor by the thermo-optic effect of the RI liquid and the thermal expansion of the sealant. The total length of the device is 10 mm, which can be further shortened to 1 mm if necessary. The temperature sensing mechanism of the liquid-sealed SFT is analyzed in detail and experimental results show the sensitivity reaches as high as -1.403 nm/degrees C. The temperature sensitivity contributions from different mechanisms are also obtained experimentally.
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