Influence of the length of a uniform fiber Bragg grating on the accuracy of measuring an impulsive strain

• Autorzy: Kaczmarek Z. , Sikora A.
• Języki publikacji: EN

Abstrakty

EN

The influence of the length of a uniform, unapodized and apodized fiber Bragg grating on the accuracy of converting an impulsive strain is discussed. Using the transfer matrix description of the grating, derived from the coupled mode theory, the reflectivity spectrum changes of the grating are calculated, which are caused by the strain pulses propagating along it. On the basis of the introduced effective central frequency of the grating, the rise-time error (RTE) and the amplitude error of the frequency change (AFCE) were calculated as a function of the ratio of the strain pulse leading front width to the grating length. These errors were calculated for different waveforms of the strain pulses. Charts presenting results of the calculations allow to select the proper length of the uniform fiber grating, when the converting error is established, and the waveform of the pulse is identified.

Słowa kluczowe

EN

optical fiber Bragg grating sensor; impulsive strain; converting error

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Optica Applicata
• Rocznik: 2008
• Tom: Vol. 38, nr 2
• Strony: 305--314
• Opis fizyczny: Bibliogr. 7 poz.

Twórcy

autor

Kaczmarek Z.

autor

Sikora A.

• Chair of Electrical Engineering and Measurement Systems, Kielce University of Technology, Aleja Tysiąclecia Państwa Polskiego 7, 25-344 Kielce, Poland

Bibliografia

• [1] OTHONOS A., KALLI K., Fiber Bragg Grating: Fundamentals and Applications in Telecommunication and Sensing, Artech House, Boston, London 1999.
• [2] ERDOGAN T., Fiber grating spectra, Journal of Lightwave Technology 15(8), 1997, pp. 1277–94.
• [3] KASHYAP R., Fiber Bragg Grating, Academic Press, San Diego 1999.
• [4] HUANG S., OHN M.M., LEBLANC M., MEASURES R.M., Continuous arbitrary strain profil measurements with fiber Bragg gratings, Smart Materials and Structures 7(2), 1998, pp. 248–56.
• [5] BRACEWELL R., The Fourier Transform and its Applications, McGraw-Hill, New York 1965.
• [6] KACZMAREK Z., Fiber Bragg grating impulsive pressure sensor, Proceedings of the SPIE 5952 2005, pp. 151–5.
• [7] KACZMAREK Z., DETKA M., The reconstruction of waveforms of impulsive strain occuring in an elasti bar by means of deconvolution in the frequency domain, Metrology and Measurement Systems 14(2), 2007, pp. 257–68.