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

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...

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Bibliographic Details
Published in:IEEE photonics journal 2012-06, Vol.4 (3), p.1035-1041
Main Authors: Reddy, P. S., Prasad, R. L. N. S., Sengupta, D., Kishore, P., Shankar, M. S., Narayana, K. S., Tiwari, U. K.
Format: Article
Language:English
Subjects:
bimetallic strips
controllability
Fiber Bragg Gratings
Fiber gratings
Optical fiber sensors
Sensitivity
Strain
Strips
temperature sensitivity
Temperature sensors
thermal stability
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Summary: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.
ISSN:1943-0655
1943-0647
DOI:10.1109/JPHOT.2012.2202102