Abstract
We construct a dimethylsulfoxide (DMSO)-based photonic crystal fiber (PCF) temperature sensor with
enhanced sensitivity. A solid-core PCF with large mode area is employed to supply the in-line Mach-Zehnder
interference between the fundamental and cladding modes. Thus, temperature sensing can be realized because of
the shift of interference spectrum at different temperatures.The DMSO solvent is infiltrated between the main
sensor and a silica tube to increase the temperature sensitivity of the sensor. The obtained sensitivity
(0.315 nm/oC) is one or two orders of magnitude higher than that of previously published results. The proposed
sensor is adapted for high-temperature sensing.
© 2014 Chinese Optics Letters
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