Method for Enhancing and Controlling Temperature Sensitivity of Fiber Bragg Grating Sensor Based on Two Bimetallic Strips

Author

Reddy, Parne Saidi ; Prasad, R. L N Sai ; Sengupta, Dipankar ; Kishore, Putha ; Shankar, M. Sai ; Narayana, K.S. ; Tiwari, U.K.

Author_Institution

Dept. of Phys., Nat. Inst. of Technol. Warangal, Warangal, India

Volume

4

Issue

3

fYear

2012

fDate

6/1/2012 12:00:00 AM

Firstpage

1035

Lastpage

1041

Abstract

This paper presents a novel structure based on bimetallic strips for enhancing temperature sensitivity of fiber Bragg grating (FBG) sensors. Two different types of sensor heads have been designed for this implementation. The first sensor head consists of an FBG that is fixed between ceramic block on one side and a bimetallic strip made up of aluminum and copper on the other. The second sensor head consists of an FBG that is fixed between two bimetallic strips. Theoretical and experimental studies carried out on these proposed sensor heads resulted in an increase in temperature sensitivity of about six times greater than that of bare FBG sensor. Further, the proposed sensors have shown good linearity and stability.

Keywords

Bragg gratings; aluminium; ceramics; copper; fibre optic sensors; optical control; optical design techniques; optical fibre theory; temperature sensors; Al-Cu; FBG sensors; bimetallic strips; ceramic block; fiber Bragg grating sensor; sensor heads; sensor linearity; sensor stability; temperature sensitivity control; Fiber gratings; Optical fiber sensors; Sensitivity; Strain; Strips; Temperature sensors; Fiber Bragg Gratings; bimetallic strips; controllability; temperature sensitivity; thermal stability;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2012.2202102

Filename

6212295