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

fYear

2014

fDate

12-15 May 2014

Firstpage

1612

Lastpage

1616

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Instrumentation and Measurement Technology Conference (I2MTC) Proceedings, 2014 IEEE International

Conference_Location

Montevideo

Type

conf

DOI

10.1109/I2MTC.2014.6861018

Filename

6861018