Title :
Enhanced plastic optical fiber sensor for refractometry based on amplitude modulation
Author :
Rodrigues, Domingos M. C. ; de Nazare, Fabio Vieira Batista ; Werneck, Marcelo Martins
Author_Institution :
Lab. de Instrumentacao e Fotonica - Programa de Eng. Eletr., Univ. Fed. do Rio de Janeiro, Rio de Janeiro, Brazil
Abstract :
The authors characterize four U-shaped plastic optical fiber sensors, manufactured with a particularly developed simple mechanical scheme, which are characterized and implemented as refractometry sensors. The enhanced measurement set-up consists of an LED and a photodiode connected to the ends of the fiber, while the signal is detected by a Lock-in amplifier implemented in Matlab. The calibration process led to the evaluation of the sensitivity, accuracy and repeatability by using solutions of sucrose for obtaining refractive indexes in the range of 1.33 - 1.39.
Keywords :
amplifiers; amplitude modulation; calibration; fibre optic sensors; light emitting diodes; optical modulation; photodetectors; photodiodes; plastics; refractive index measurement; signal detection; LED; Matlab implementation; amplitude modulation; calibration; enhanced U-shaped plastic optical fiber sensor; lock-in amplifier; photodiode; refractive index; refractometry sensor; signal detection; Optical fiber amplifiers; Optical fiber sensors; Probes; Refractive index; Uncertainty; bending; plastic optical fiber; refractive index; sensor; uncertanty;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International
Conference_Location :
Montevideo
DOI :
10.1109/I2MTC.2014.6861018
