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Vol. 129, Issue 6, June 2011, pp.142-148

 

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Glucose Concentration Sensor Based on Long Period Grating Fabricated from Hydrogen Loaded Photosensitive Fiber

 
1, 2* T. M. Libish, 1J. Linesh, 1M. C. Bobby, 1B. Nithyaja, 1S. Mathew, 1C. Pradeep and 1P. Radhakrishnan

1International School of Photonics

Cochin University of Science and Technology, Cochin-22, Kerala, India

2 S.C.T.College of Engineering, Trivandrum, Kerala, India

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

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

 

 

Received: 3 May 2011   /Accepted: 20 June 2011   /Published: 30 June 2011

Handbook of Laboaratory Measurements book

 

Abstract: A fiber optic sensing system for the concentration measurement of glucose in distilled water is presented. The fundamental principle of detection is the sensitive dependence of the resonance peaks of a Long Period Grating (LPG) on the changes in the refractive index of the environmental medium, surrounding the cladding surface of the grating. The performance of the sensor has been tested by, monitoring wave length shift and amplitude changes of the attenuation bands of the LPG in response to variation of glucose concentration levels. The developed sensor is user-friendly, reusable and allows instantaneous determination of the glucose concentration without involving any reagents.

 

Keywords: Long Period Grating, Refractive index sensor, Fiber optic glucose sensor

 

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