Ian Yulianti, - Temperature sensitivity investigation of tapered plastic optical fiber-Mach Zehnder interferometer for sensor application. Journal of Physics: Conference Series.

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Abstract

Mach Zehnder interferometer (MZI) based on plastic optical fiber (POF) is interesting due to its robustness and simple fabrication. In this work, MZI-POF was designed and its sensitivity to temperature change was characterized to investigate its performance for sensor application. The MZI-POF was fabricated by forming two tapers at several distance by simple heat-pull method. The spectra was investigated by launching white light emitting diode (LED) and the output were observed using VIS-NIR spectrometer. It is shown that the wavelength of spectrum peak and spectrum dip were shifted compared to that of un-tapered POF which indicates that the structure serves well as MZI. Sensor sensitivity to temperature was determined by measuring the spectrum for various temperature which was varied from 40oC to 80oC with increment of 5oC. The result showed that the sensor sensitivity is 0.0693nm/oC in terms of peak measurement and 0.0487nm/oC for dip measurement. Therefore, MZI-POF is a potential candidate for temperature sensor.

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