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A LOW-COST FIBER-OPTIC TEMPERATURE SENSOR BASED ON RUBY FLUORESCENCE LIFETIME AND A SIMPLE MICROCONTROLLER BOARD.

Authors :
Engelbrecht, Rainer
Salberg, Timo
Bachmann, Alexander
Ziemann, Olaf
Source :
POF Plastic Optical Fiber; Sep/Oct2021, Vol. 31 Issue 5, p8-11, 4p
Publication Year :
2021

Abstract

In this paper we present a complete low-cost sensor system including fiber-optics, electronics, and data processing implemented on a simple microcontroller. The system can be operated stand-alone, showing real-time temperatures on a display or connected for data logging to a PC. Cheap ruby spheres or half-spheres from mass production are integrated in a small fiber-optic sensor head. All electronics including a high-power blue LED and a Si photodiode are easily integrated on a modified commercial add-on board on top of a Nucleo-64 development kit for STM32 microcontrollers. Temperature measurement is done by fitting the exponential decay of the ruby fluorescence after pulsed excitation. Calibration and testing was done in a climate chamber, achieving a temperature accuracy of 0.5 K within a range of -40°C to +80°C. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
10641068
Volume :
31
Issue :
5
Database :
Complementary Index
Journal :
POF Plastic Optical Fiber
Publication Type :
Periodical
Accession number :
153304530