[6] Yu Y Q, Ruan S C, Yang H L, et al. Temperature sensor using a long period fiber grating fabricated by 800 nm femtosecond laser pulses [C]. Proceedings of the SPIE-The International Society for Optical Engineering, 2010, 7655: 76550Q.
[8] Masson F, Decker C, Andre S, et al. UV-curable formulations for UV-transparent optical fiber coatings I. Acrylic resins [J]. Prog. Org. Coat., 2004, 49(1): 1-12.
[9] Kondo Y, Nouchi K, Mitsuyu T, et al. Fabrication of long-period fiber gratings by focused irradiation of infrared femtosecond laser pulses [J]. Opt. Lett., 1999, 24(10): 646-648.
[10] Nikogosyan D N. Multi-photon high-excitation-energy approach to fibre grating inscription [J]. Meas. Sci. Technol., 2007, 18: R1-R29.
[11] Chiang K S, Liu Y Q, Meinar N, et al. Analysis of etched long-period fibre grating and its response to external refractive index [J]. Electron. Lett., 2000, 36(11): 966-967.
[12] Martinez A, Khrushchev I, Bennion I. Direct inscription of Bragg gratings in coated fibers by an infrared femtosecond laser [J]. Opt. Lett., 2006, 31(11): 1603-1605.