Long-period gratings with high insensivity to external refractive index inscribed by using a CO.sub.2./sub. laser in fibers with parabolic-index cladding

CHOMÁT, M., ČTYROKÝ, J., BERKOVÁ, D., MATĚJEC, V., KAŠÍK, I., PROBOŠTOVÁ, J., TODOROV, F., JANČÁREK, A. Long-period gratings with high insensivity to external refractive index inscribed by using a CO₂ laser in fibers with parabolic-index cladding. In: BALDINI, Francesco, HOMOLA, Jiří, LIBERMAN, Robert A., MILER, Miroslav, eds. Optical Sensing Technology and Applications. Bellingham: SPIE - The International Society for Optical Engineering, 2007, s. 65850F.1-6580F.10. Proceedings of SPIE, Vol. 6585. ISBN 978-0-8194-6713-3. ISSN 0277-786X.