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Teflon-coated fiber Bragg grating sensor for wide range of temperature measurements

P. SAIDI REDDY1, R. L. N SAI PRASAD1,* , D. SENGUPTA1, M. SAI SHANKAR1, K. SRIMANNARAYANA1

Affiliation

  1. Department of Physics, National Institute of Technology, Waranagal-506 004, India

Abstract

Cryogenic temperature sensing has been demonstrated using FBGs with polymer coating of various thicknesses and the experimental results have been presented in this paper. Teflon coating applied on Fiber Bragg Gratings which are inscribed in silica fiber (TFBG) with coating thicknesses of 20 and 40 micrometers have been used in the present investigation. The Bragg wavelength was measured in the temperature range from -196°C to 800°C in the case of regular FBGs and TFBGs. TFBGs were found having better linearity and sensitivity compared with the response of regular uncoated FBGs..

Keywords

Fiber Bragg grating, Polymer coating, Regeneration. Thermal stability.

Submitted at: Sept. 15, 2010
Accepted at: Oct. 14, 2010

Citation

P. SAIDI REDDY, R. L. N SAI PRASAD, D. SENGUPTA, M. SAI SHANKAR, K. SRIMANNARAYANA, Teflon-coated fiber Bragg grating sensor for wide range of temperature measurements, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 10, pp. 2040-2043 (2010)