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Vol. 84, Issue 10, October 2007, pp.1633-1640

 

Bullet

 

A Comparative Study of Fiber Optic Humidity Sensors Based on Chitosan and Agarose

 

*Jinesh Mathew, K. J. Thomas, V. P. N. Nampoori and P. Radhakrishnan

International School of Photonics,

Cochin University of Science and Technology,

Cochin-22, Kerala, India

Tel.: +91 4842575848, fax: +91 4842576714

*E-mail: jineshtmathew@gmail.com, http://www.photonics.cusat.edu

 

 

Received: 18 September 2007   /Accepted: 23 October 2007   /Published: 30 October 2007

 

Abstract: A comparative study of two biopolymer based fiber optic humidity sensors is presented in this paper. Sensing elements Agarose and Chitosan swells in the presence of water vapour and undergoes changes in refractive index and modulates the intensity of light propagating through a fiber with Agarose or Chitosan as cladding.

 

Keywords: Fiber optic sensor, Humidity sensor, Swelling polymer, Chitosan, Agarose

 

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