[2] Oi K, Barnier F, Obara M. Fabrication of fiber Bragg grating by femtosecond laser interferometry[C]. Lasers and Electro-Optics Society, the 14th Annual Meeting of the IEEE, 2, 776-777(2002).
[5] Liao C R. Study of optical fiber grating sensors fabricated by femtosecond laser pulses[D]. Hongkong: The Hong Kong Polytechnic University, 24(2012).
[18] Liao C R, Li Y H, Wang D N et al. Morphology and thermal stability of fiber Bragg gratings for sensor applications written in H2-free and H2-loaded fibers by femtosecond laser[J]. IEEE Sensors Journal, 10, 1675-1681(2010).