FIBER OPTIC HYDROCARBON SENSORS BASED ON LONG PERIOD GRATINGS

R. Falate, R. C. Kamikawachi, J. L. Fabris, M Müller, Hypolito José Kalinowski

Abstract


We report the use of long period gratings (LPG) fabricated with electrical arc discharges from a fusion splicer for hydrocarbon detection in both fuel and atmospheric environment. In the fuel experiments, four different types of solvents are used. Wavelength shifts in the attenuation peak as longer as 10.3 nm, 2.6 nm, 50.6 nm, and 6.1 nm are obtained when different concentrations of turpentine, naphtha, thinner, and anhydrous alcohol, respectively, are added to the commercial Brazilian gasoline blend. The exposition of LPG to a mixture of butane and propane in air results in a wavelength shift of 0.6 nm in the attenuation peak. These results point to the prospect of using the LPG sensor for fuel quality control and for the detection of petroleum pollutant in atmospheric environment.

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References


A. D. Kersey et al, "Fiber gratings sensors``, J. Lightwave Technol., vol. 15, no. 8, pp. 1442-1463, Aug. 1997.

A. Othonos, and K. Kalli, Fiber Bragg gratings: fundamentals and applications in telecommunications and sensing, Ed. Artech House: Norwood, 1999.

A. M. Vengsarkar, P. J. Lemaire, J. B. Judkins, V. Bhatia, T. Erdogan, and J. E. Sipe, "Long-period fiber gratings as band-rejection filters``, J. Lightwave Technol., vol. 14, no. 1, pp. 58-65, Jan. 1996.

H. J. Patrick, A. D. Kersey, and F. Bucholtz, "Analysis of the response of long period fiber gratings to external index of refraction``, J. Lightwave Technol., vol. 16, no. 9, pp. 1606-1612, Sept. 1998.

R. Falate, H. J. Kalinowski, J. L. Fabris, and M. Müller, "Long period grating application for fuel quality control``, in Proc. Of Sixth International Conference on Optoelectronics, Fiber Optics and Photonics, Mumbai, Dec. 2002, pp. 351-354.

K. S. Chiang, Y. Liu, M. N. Ng, and X. Dong, "Analysis of etched long-period fibre grating and its response to external refractive index``, Electronics Letters, vol. 36, no. 11, pp. 966-967, May 2000.

M. Miyagi, and S. Nishida, "An approximate formula for describing dispersion properties of optical dielectric slab and fiber waveguides``, J. Opt. Soc. Am., vol. 69, pp. 291-293, Feb. 1979.

G. Rego, O. Okhotnikov, E. Dianov, and V. Sulimov, "High-temperature stability of longperiod fiber gratings produced using an electrical arc``, J. Lightwave Technol., vol. 19, no. 10, pp. 1574-1579, Oct. 2001.

M. R. Spiegel, Mathematical Handbook of Formulas and Tables, Ed. McGraw-Hill Inc.: USA, 1968.


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