DETERMINATION OF THE RECORDING PROFILE OF FIBER OPTIC BRAGG GRATINGS
Keywords:Bragg gratings, refractive index profile, optical fibers
This work presents a method for obtaining the recording profile of fiber optic Bragg gratings. The modulation pattern is obtained with the aid of metallic and dielectric targets (Gold, Nickel, Aluminum and Poly-metil-metacrylate) positioned at the focal point of the recording interferometer. For the used 266 nm light the determined profile's envelope is irregular and the modulation period is within the expected 0.5 micrometer range. The results permit to use the method as an important tool in the optimization of the writing process of Bragg gratings in optical fibers.
S. A. Vasilev, O. I. Medvedkov, I. G. Korolev, A. S. Bozhkov, za. Zs. Zkurkov and E. M. Dianov, "Fiber Gratings and their Applications``, Quantum Electron., vol. 35, pp. 1085-1103, September 2005.
C. C. Chan, C. Z. Shi, J. M. Gong, W. Jin and M. S. Demokan, "Enhacement of the Measurement range of FBG Sensors in a WDM Network Using a Minimum Variance Shift Technique Coupled with Amplitude-Wavelength Dual coding``, Optics Commun., vol. 215, pp. 289-294, December 2002.
N. M. Litchinitser, B. J. Eggleton and D. B. Patterson, "Fiber Bragg Gratings for Dispersion Compensation in Transmission: Theoretical Model and Design Criteria for Nearly Ideal Pulse Recompression``, J. Lightw. Technol., vol. 15, August 1997.
R. Kashyap, "Fiber Bragg Gratings``, San Diego: Acad. Pree., pp. 55-108, 1999.
A. Othonos, "Fiber Bragg Gratings``, Rev. Sci. Instrum., vol. 68, pp. 4309-4341, December 1997.
G. C. Bjorklund, L. F. Mollenauer and W. J. Tomlinson, "Distributed-Feedback Color Center Lasers in the 2,5-3,0 ïm Region``, Appl. Phys. Lett., vol. 29, pp. 116-118, July 1976.
F. Klemba, F. Kuller, C. Marconcin, J. C. C. Silva, M. Muller, A. A. P. Pohl, J. L. Fabris H. J. Kalinowski, "Implementação de Sistema de Gravação de Redes de Bragg com perfis Arbitrários de Apodização por Varredura do Feixe de Escrita``, 12Âº Simpósio Brasileiro de Microondas e Optoeletrônica, vol. 1, pp. 6-10, 2006.
J. Strong, H. V. Neher, A. E. Whitford, C. H. Cartwright and R. Hayward, "Procedures in Experimental Physics``, 22rd ed., vol. 1, Englewood Cliffs: Prentice-Hall, pp. 151-187, 1961.
W. W. Flack, D. S. Soong, A. T. Bell and D. W. Hess, "A Mathematical Model for Spin Coating Polymer Resists``, J. Phys., vol. 56, pp. 1199-1206, August 1984.
J. E. Andrew, P. E. Dyer, R. D. Greenough and P. H. Key, " Metal Film Removal and Patterning Using a XeCl laser``, Appl. Phys. Lett., vol. 43, pp. 1076-1078, December 1983.