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Liquid level switch using Bragg grating

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

Affiliation

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

Abstract

A wavelength encoded liquid level switch and its fabrication is experimentally demonstrated using two inline fiber Bragg gratings (FBG). Cladding of one FBG is removed by etching and it makes the FBG to be refractive index sensitive. Thus FBG became an on-off switch sensor to control the liquid level. Another FBG is used for temperature compensation. The sensor has good repeatability.

Keywords

Fiber Bragg grating, Effective refractive index, Liquid level.

Citation

D. SENGUPTA, M. SAI SHANKAR, P. SAIDI REDDY, R. L. N SAI PRASAD, K. SRIMANNARAYANA, Liquid level switch using Bragg grating, Optoelectronics and Advanced Materials - Rapid Communications, 4, 7, July 2010, pp.939-942 (2010).

Submitted at: June 10, 2010

Accepted at: July 14, 2010