Performance analysis of peak tracking techniques for fiber Bragg grating interrogation systems

Daniele Tosi, Massimo Olivero, Guido Perrone

Abstract


In this paper, we propose a spectral correlation-based technique for tracking the wavelength shift of a fiber Bragg grating. We compared this approach, by means of a Monte Carlo numerical simulation, to the typical peak tracking techniques applied in classic interrogation systems. As result, we obtained a considerable gain in terms of noise tolerance (about 20 dB), which can be further incremented by selecting large-bandwidth gratings. This permits to increase the power budget of a fiber Bragg grating interrogator without changing the optical layout, overcoming classical limitations of commercial and custom systems. Penalties due to the non-idealities have been evaluated through the same Monte Carlo approach. Finally, we discuss a practical application of the peak tracking techniques to a fiber Bragg grating-based weight sensor, in which we applied the spectral correlation to track both the Bragg wavelength position, spectral deformations due to high strain, and spectral non-linearity.

Full Text:

PDF

References


J. Rao, "In-fibre Bragg grating sensors,`` Meas. Sci. Technol., vol. 8, pp.355-375, 1997.

A. D. Kersey, M. A. Davis. H. J. Patrick, M. LeBlane, K. P. Koo, C. G. Askins, M. A. Putnam, E. J. Fabriele, "Fiber grating sensors``, J. Lightw. Technol., vol. 15, pp. 1442-1463, 1997.

E. J. Fabriele, "Fiber Bragg grating strain sensor: present and future in smart structures,`` Opt. Photon. News, vol. 9, pp. 33-37, 1998.

Y. Want, Y. Cui, B. Yun, "A fiber Bragg grating sensor system for simultaneously static and dynamic measurements with a wavelength-swept fiber lasers,`` IEEE Photon. Technol. Lett., vol. 18, pp. 1539-1541, 2006.

M. G. Xu, H. Geiger, J. L. Archambauldt, L. Reekie, J. P. Dakin, "Novel interrogation system for fibre Bragg grating sensors using an acousto-optic tunable filter,`` Electron. Lett., vol. 29, pp. 1510-1511, 1993.

M. A. Davis, A. D. Kersey, "Matched-filter interrogation technique for fibre Bragg grating arrays,`` Electron. Lett., vol. 31, n.10, pp. 822-823, 1995.

R. W. Fallon, L. Zhang, A. Gloag, I. Bennion, "Identical broadband chirped grating-interrogation technique for temperature and strain sensing,`` Electron. Lett., vol. 33, n. 8, pp. 705-707, 1997.

Y. Yu, H. Zhao, "A novel demodulation scheme for fiber Bragg grating sensor systems,`` IEEE Photon. Technol. Lett., vol. 17, n. 1, pp. 166-168, 2005.

A. D. Kersey, T. A. Berkoff, W. W. Morey, "High resolution fibre grating based strain sensor with interferometric wavelength shift detection,`` Electron. Lett., vol. 28, p. 236, 1992.

S. T. Oh, W. T. Han, U. C. Paek, Y. Chung, "Discrimination of temperature and strain with a single FBG based on the birefringence effect,`` Opt. Expr., vol. 12, n. 4, pp. 724-729, 2004.

C.-C. Ye, S. E. Staines, S. W. James, R. P. Tatam, "A polarization-maintaining fibre Bragg grating interrogation system for multi-axis strain sensing,`` Meas. Sci. Technol., vol. 13, pp. 1446-1449, 2002.

A. Mendez, "Fiber Bragg grating sensors: a market overview,`` Proc. SPIE, vol. 6619, pp. 661905.1-661905.6, 2007.

T. Erdogan, "Fiber grating spectra,`` J. Lightw. Technol., vol. 15, n. 8, pp. 1277-1294, 1997.

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

G. Meltz, W.W. Morey, "Bragg grating formation and germanosilicate fiber photosensitivity.`` Proc. SPIE, vol. 1516, pp. 185-199, 1991.

J. M. Gong, C. C. Chan, W. Jin, J. M. K. MacAlpine, M. Zhang, Y. B. Liao, "Enhancement of wavelength detection accuracy in fiber Bragg grating sensors using a spectrum correlation technique,`` Opt. Comm., vol. 212, pp. 29-33, 2002.

L. Negri, A. Nied, H. Kalinowski, A. Paterno, "Benchmark for peak detection algorithms in fiber Bragg grating interrogation and a new neural network for its performance improvement,`` Sensors, vol. 11, n. 4 pp. 3466-3482, 2011.

S. D. Dyer, P. A. Williams, R. J. Espejo, J. D. Kofler, S. M. Etzel, "Fundamental limits in fiber Bragg grating peak wavelength measurements,`` Proc. SPIE, vol. 5855, 2005.

M. H. Kalos, P. A. Whitlock, Monte Carlo Methods, John Wiley & Sons, 1986.

Micron Optics, www.micronoptics.com.

BaySpec, Inc., www.bayspec.com.




DOI: http://dx.doi.org/10.1590/S2179-10742012000200003

Refbacks

  • There are currently no refbacks.


© Copyright 2007-2016 JMOe Brazilian Microwave and Optoelectronics Society (SBMO) and Brazilian Society of Electromagnetism (SBMag)