Temperature monitoring using polymer optical fiber with integration to the internet of things

Abstract

In this paper, a polymer optical fiber (POF) is applied for temperature measuring of water solution using a light source of 650nm. The aim is to analyse the impact of temperature variations on the output of POF sensor device in terms of output power and sensitivity. From the study, the POF sensor shows a linear trend when the temperature is increased from 30°C to 80°C with the sensitivity of the polymer optical fiber for output power to the temperature are 0.00973 dBm/°C or 0.14797 nW/°C, for optical characterization and 0.0011 V/°C for electrical characterization. The integration of the Internet of Things to the system helps the user to monitor the temperature of various spaces anywhere at any time. The sensed values are controlled by Arduino Uno R3 and then sent to Blynk to provide wireless monitoring by the user.

A novel examination of limonene detection using plastic fiber optic sensors and the tapered approach

“…POF sensors have been used to develop and demonstrate a variety of current biosensor applications which are based on utilizing these multimode fibers for intensity modulation [7]- [11]. Polymethylmethacrylate (PMMA), polycarbonate (PC), polystyrene (PS) [12], and, more recently, cyclic transparent optical polymer (CYTOP), have all been used to manufacture the fiber's core. CYTOP has the lowest attenuation-50 dB/km at 650 nm-compared to PMMA-based POF, the value of which is 160 dB/km.…”

“…Despite their wider availability and lower price, step-index PMMA-based POF sensors currently make up the majority of sensors [13], [14]. To increase the bandwidth and decrease the bending sensitivity, other POF variations have also been introduced, such as multicore fibers, double-step-index fibers, multi-step-index fibers, and graded-index fibers [12], [15], [16]. The ability to modify the hole shape to optimize the sensitivities of various loss characteristics for a variety of measurands and the use of asymmetric microstructures for directional bend sensitivity are the advantages of POFs [17]- [20].…”