Design of an optical sensing interrogator using an edge filter scheme

Author

Alfonso, Jhon E. ; Cardenas, Luis G. ; Triana, Cristian A. ; Varon Duran, Margarita

Author_Institution

High Freq. Electron. & Commun. (CMUN) Res. Group, Univ. Nac. de Colombia, Bogota, Colombia

fYear

2013

fDate

4-7 Aug. 2013

Firstpage

1

Lastpage

5

Abstract

In this paper the design and initial development of a Fiber Bragg Grating (FBG) sensor interrogation system are presented. It uses an edge filter, among other optical components, and measures the wavelength signals with a microcontroller. The system was designed for the 1550 nanometers band with an acquisition rate of 2.5 kHz. The performance of the interrogator was tested obtaining a stable voltage ratio when changing the input signal and a linear performance of this voltage ratio when a temperature of 20-70° C is induced into a FBG sensor connected to the system. These results demonstrate the feasibility of specific, low-cost interrogation systems with high acquisition rates.

Keywords

Bragg gratings; fibre optic sensors; optical design techniques; optical filters; FBG sensor; edge filter scheme; fiber Bragg grating sensor interrogation system; frequency 2.5 kHz; high acquisition rates; microcontroller; optical sensing interrogator design; specific low-cost interrogation systems; stable voltage ratio; temperature 20 degC to 70 degC; wavelength 1550 nm; Circulators; Lasers; Optical coupling; Optical receivers; Optical sensors; Edge filter; Optical fiber sensor; Optical interrogator; fiber Bragg grating;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave & Optoelectronics Conference (IMOC), 2013 SBMO/IEEE MTT-S International

Conference_Location

Rio de Janeiro

Type

conf

DOI

10.1109/IMOC.2013.6646509

Filename

6646509