Refractive index and concentration sensing of solutions using mechanically induced long period grating (LPG) pair

Mishra, Vandana and Singh, Nahar and Jain, S.C. and Kaur, Palvinder and Luthra, Ruchi and Singla, Himani and Jindal, V.K. and Bajpai, R.P. (2005) Refractive index and concentration sensing of solutions using mechanically induced long period grating (LPG) pair. Optical Engineering, 44 (9). 094402. ISSN 0091-3286

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Abstract

We demonstrate the use of a pair of mechanically induced long period gratings (LPGs) for sensing the refractive index and concentration of liquids for which NaCl solutions of different concentrations and standard refractive index liquids are studied. The effect of varying the refractive index and∕or concentration is reflected in changing output power loss values at resonance wavelengths. For a concentration change from 5 to 20 g per 100 ml, the maximum variation detected in optical output power is 20 pW, while for a refractive index variation from 1.446 to 1.458, it is 11 pW. These studies are quite useful for chemical, pharmaceutical, biological, and process control sensing applications.

Item Type: Article
Uncontrolled Keywords: diffraction gratings; chemical sensors; fiber optic sensors; refractive index; chemical variables measurement; chemical analysis; sodium compounds
Subjects: CSIO > Optics
Depositing User: Ms. J Shrivastav
Date Deposited: 29 Mar 2012 23:40
Last Modified: 10 Apr 2012 14:11
URI: http://csioir.csio.res.in/id/eprint/29

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