Towards tuning of thermal sensitivity of the long period fiber gratings using a liquid crystal layer

• Autorzy: Czapla A. , Bock W. , Mikulic P. , Woliński T.
• Języki publikacji: EN

Abstrakty

EN

A high-efficiency thermal tuning filter based on a long-period fiber grating (LPFG) combined with a low-birefringence liquid crystal (LB LC) cladding layer is presented. Two types of LPFGs were studied and compared: the LPFGs based on a standard telecommunication fiber produced by an electric arc technique, and the LPFGs based on a boron co-doped fiber written by a UV technique. Both types of LPFGs when enhanced with an external LB LC layer exhibit two different temperature sensitivities, which depend on the temperature range of operation. For the LPFGs based on standard telecommunication fiber we can conclude that the presence of the LB LC cladding increases the thermal tuning efficiency by more than one order of magnitude over the value for the LPFGs in air. In the case of the LPFGs based on the boron co-doped fiber we discovered it is possible to obtain either a temperature-independent attenuation band or the attenuation bands with high temperature sensitivities, just by careful choice of the order of the cladding mode and the operating wavelength.

Słowa kluczowe

EN

long period fiber grating; liquid crystal; sensors

• Wydawca: Polska Akademia Nauk, Wydział IV Nauk Technicznych
• Czasopismo: Bulletin of the Polish Academy of Sciences. Technical Sciences
• Rocznik: 2010
• Tom: Vol. 58, nr 4
• Strony: 503--508
• Opis fizyczny: Bibliogr. 10 poz., rys.

Twórcy

autor

Czapla A.

autor

Bock W.

autor

Mikulic P.

autor

Woliński T.

• Centre de recherche en photonique, Universit´e du Qu´ebec en Outaouais, 283 Alexandre Tach. Ave., Quebec, Canada,

Bibliografia

• [1] O. Fraz˜ao, G. Rego, M. Lima, A. Teixeira, F.M. Ara´ujo, P. Andr ´e, J.F. Rocha, and H.M. Salgado, “EDFA gain flattening using long-period fibre gratings based on the electric arc technique”, Proc. London Communications Symposium 1, 55–57 (2001).
• [2] K. Seng Chiang and Q. Liu, “Long-period grating devices for application in optical communication”, Proc. ICOCN 1, 128–133 (2006).
• [3] D. Noordegraaf, L. Scolari, J. Legsgaard, L. Rindorf, and T.T. Alkeskjold, “Electrically and mechanically induced longperiod gratings in liquid crystal photonic bandgap fibers”, Opt. Exp. 13, 7901–7912 (2007).
• [4] T.R. Woliński, P. Lesiak, and A.W. Domański, “Polarimetric optical fiber sensors of a new generation for industrial applications”, Bull. Pol. Ac.: Tech 56 (2), 125–132 (2008).
• [5] M.S. Chychłowski, S. Ertman, and T.R. Woliński, “Analysis of liquid crystals orientation in microcapillaries”, Photonics Letters of Poland 2 (1), 31–33 (2010).
• [6] M.M. Tefelska, M.S. Chychłowski, T.R. Woliński, R. Dąbrowsko, and J. Wójcik, “Tunable attenuation in photonic liquid crystal fibers”, Photonics Letters of Poland 1 (2), 97–99 (2010).
• [7] I. Del Villar, I.R. Matias, and F.J. Arregui, “Long-period fiber gratings with overlay of variable refractive index”, IEEE Photon. Technol. Lett. 17, 1893–1895 (2005).
• [8] T.R. Woliński, A. Czapla, S. Ertman, M. Tefelska, A. Domański, J. Wójcik, E. Nowinowski-Kruszelnicki, and R. Dąbrowski, “Photonic liquid crystal fibers for sensing applications”, IEEE Trans. Inst. Meas. 57 (8), 1796–1802 (2008).
• [9] S.W. James and R.P. Tatam, “Optical fibre long-period grating sensors: characteristics and applications”, Meas. Science and Technol. 14 (5), R49–R61 (2003).
• [10] M. Śmietana, W.J. Bock, and P. Mikulic, “Comparative study of long-period gratings written in a boron co-doped fiber by an electric arc an UV irradiation”, Meas. Sci. Technol. 21 (2), 1422–1427 (2010).