Title :
Highly Sensitive Temperature Sensor Based on a Polymer-Coated Microfiber Interferometer
Author :
Hernandez-Romano, Ivan ; Monzon-Hernandez, David ; Moreno-Hernandez, Carlos ; Moreno-Hernandez, David ; Villatoro, Joel
Author_Institution :
Fibras Opticas, Centro de Investig. en Opt., Guanajuato, Mexico
Abstract :
A simple-to-fabricate and highly sensitive optical fiber temperature sensor is presented. The device consists of an optical microfiber mode interferometer embedded in a polymer with high thermo-optic coefficient which is also used as a packaging material. Temperature modifies the refractive index of the polymer, hence the phase difference between the interfering modes, which results in a prominent wavelength shift of the interference pattern. The sensor was tested in the 20 °C-48 °C range. The temperature sensitivity was found to be 3101.8 pm/°C. The simplicity and the performance of our device make it attractive for several applications.
Keywords :
fibre optic sensors; light interferometers; micro-optics; microsensors; optical polymers; temperature sensors; thermo-optical devices; thermo-optical effects; highly sensitive optical fiber temperature sensor; highly sensitive temperature sensor; interference pattern; interfering modes; optical microfiber mode interferometer; packaging material; polymer-coated microfiber interferometer; refractive index; temperature 20 degC to 48 degC; temperature sensitivity; thermo-optic coefficient; wavelength shift; Optical fiber sensors; Optical fibers; Optical interferometry; Refractive index; Temperature measurement; Temperature sensors; Optical fiber; interferometric sensors; temperature measurement;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2015.2478790
