Chemical sensor for nitrate in water using long period optical fiber grating fabricated by point by point method

Author

Akki, J.F. ; Lalasangi, A.S. ; Raikar, U.S. ; Kulkarni, V.K. ; Radhakrishnan, Pooja ; Pattanshetty, I.I.

Author_Institution

Karnatak Univ., Dharwad, India

fYear

2012

fDate

26-28 July 2012

Firstpage

1

Lastpage

4

Abstract

We present long period grating (LPG) fabrication and application of LPG as chemical sensor. We fabricated LPG of grating period 610μm in single mode communication grade fiber using point by point method. Here we used 12watt CO₂ laser to irradiate the fiber. The behavior of resonance wavelength of LPG was studied by immersing it in nitrate solution of concentration ranging from 10ppm to 50ppm. The results showed the linear behavior of resonance wavelength of LPG that can be used to determine the concentration of nitrate in water.

Keywords

Bragg gratings; chemical sensors; fibre optic sensors; gas lasers; laser beam effects; optical fibre fabrication; CO₂ laser; LPG fabrication; chemical sensor; fiber irradiation; linear behavior; long period optical fiber grating; nitrate solution concentration; point by point method; power 12 W; resonance wavelength; single mode communication grade fiber; Fiber gratings; Fiber lasers; Optical fiber communication; Optical fiber dispersion; Optical fiber sensors; Optical fibers; Carbon dioxide laser; Chemical sensor; Long period grating; Point by point method;

fLanguage

English

Publisher

ieee

Conference_Titel

Optical Engineering (ICOE), 2012 International Conference on

Conference_Location

Belgaum

Print_ISBN

978-1-4673-2461-8

Electronic_ISBN

978-1-4673-2462-5

Type

conf

DOI

10.1109/ICOE.2012.6409565

Filename

6409565