Abstract

The novel long-period fiber grating (LPFG) film sensor is composed of the long-period grating coated with solgel-derived sensitive films. The characteristics of the transmissivity of the LPFG film sensor are studied. By analyzing the relation among the sensitivity Sn, the thin film optical parameters, and the fiber grating parameters, the optimal design parameters of the LPFG film sensor are obtained. Data simulation shows that the resolution of the refractive index of this LPFG film sensor is predicted to be 108. Experimentally, a LPFG film sensor for detection of C2H5OH was fabricated, and a preliminary gas-sensing test was performed.

© 2006 Optical Society of America

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References

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2004 (1)

Z. T. Gu and P. H. Liang, Opt. Laser Technol. 36, 211 (2004).
[CrossRef]

2003 (1)

S. W. James and R. P. Tatam, Meas. Sci. Technol. 15, 49 (2003).
[CrossRef]

2002 (1)

2001 (1)

R. Falciai, A. G. Mignani, and A. Vannini, Sens. Actuators B 74, 74 (2001).
[CrossRef]

1997 (1)

1996 (1)

1971 (1)

Bhatia, V.

Erdogan, T.

Falciai, R.

R. Falciai, A. G. Mignani, and A. Vannini, Sens. Actuators B 74, 74 (2001).
[CrossRef]

Gloge, D.

Gu, Z. T.

Z. T. Gu and P. H. Liang, Opt. Laser Technol. 36, 211 (2004).
[CrossRef]

James, S. W.

S. W. James and R. P. Tatam, Meas. Sci. Technol. 15, 49 (2003).
[CrossRef]

N. D. Rees, S. W. James, and R. P. Tatam, Opt. Lett. 27, 686 (2002).
[CrossRef]

Liang, P. H.

Z. T. Gu and P. H. Liang, Opt. Laser Technol. 36, 211 (2004).
[CrossRef]

Mignani, A. G.

R. Falciai, A. G. Mignani, and A. Vannini, Sens. Actuators B 74, 74 (2001).
[CrossRef]

Rees, N. D.

Tatam, R. P.

S. W. James and R. P. Tatam, Meas. Sci. Technol. 15, 49 (2003).
[CrossRef]

N. D. Rees, S. W. James, and R. P. Tatam, Opt. Lett. 27, 686 (2002).
[CrossRef]

Tsao, C.

C. Tsao, Optical Fibre Waveguide Analysis (Oxford U. Press, 1992).

Vannini, A.

R. Falciai, A. G. Mignani, and A. Vannini, Sens. Actuators B 74, 74 (2001).
[CrossRef]

Vengsarkar, A. M.

Appl. Opt. (1)

J. Opt. Soc. Am. A (1)

Meas. Sci. Technol. (1)

S. W. James and R. P. Tatam, Meas. Sci. Technol. 15, 49 (2003).
[CrossRef]

Opt. Laser Technol. (1)

Z. T. Gu and P. H. Liang, Opt. Laser Technol. 36, 211 (2004).
[CrossRef]

Opt. Lett. (2)

Sens. Actuators B (1)

R. Falciai, A. G. Mignani, and A. Vannini, Sens. Actuators B 74, 74 (2001).
[CrossRef]

Other (1)

C. Tsao, Optical Fibre Waveguide Analysis (Oxford U. Press, 1992).

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Figures (4)

Fig. 1
Fig. 1

Transmission spectrum of HE 13 mode with different refractive index ( h 3 = 500 nm , σ = 2 × 10 4 , L = 1.8 cm , Λ = 450 μ m ).

Fig. 2
Fig. 2

Dependence of S n max on refractive index n 3 for h 3 ranging from 0 800 nm ( n 3 = 1.5 1.9 ) .

Fig. 3
Fig. 3

Contour line of S n max = 10 3 , 10 4 . The contour of 10 4 is located in the center of the right branch.

Fig. 4
Fig. 4

Measured wavelength shift of the fourth-order resonance peak captured on an optical spectrum analyzer.

Tables (1)

Tables Icon

Table 1 Typical Film Optical Parameters and Relevant Sensitivity and Resolution for Same Grating Parameters a

Equations (3)

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β co β cl ( l , v ) = l 2 π Λ , l , v = 1 , 2 , 3 , ,
S n = T n 3 n 3 T .
δ n = S n 1 n f ( d T T ) 1 ,

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