[1] Vengsarkar A M, Lemaire P J, Judlins J B et al.. Long-period fiber gratings as band-rejection filter. J. Lightwave Technol., 1996, 14(1):58～65

[2] Lee B H, Liu Y, Lee S B et al.. Displacements of the resonant peaks of a long-period fiber gratings induced by a change of ambient refractive index. Opt. Lett., 1997, 22(23):1769～1771

[4] Salik E, Starodubov D S, Grubsky V et al.. Thermally stable gratings in optical fibers without temperature annealing. OFC ′99, 1999, Paper TH03-1:56～58

[5] Guan Bai′ou, Tam Hwayaw, Tao Xiaoming et al.. Highly stable fiber gratings written in hydrogen-loaded fiber. Photonics Tech. Lett., 2000, 12(10):1349～1351

[6] Wang Qinglin, Hidayat A, Niay P et al.. Influence of blanket postexposure on the thermal stability of the spectral characteristics of gratings written in a telecommunication fiber using light at 193 nm. J. Lightwave Technol., 2000, 18(8):1078～1083

[7] Kogelnik H. Theory of dieletric waveguides. In: Tamir T ed. Integrated Optics. Vol.7. Berlin, Heidelberg, New York: Springer-Verlag, 1975. 71～73

[8] Lemaire P J, Atkins R M, Mizrahi V et al.. High-pressure H2 loading as a technique for achieving ultrahigh UV photosentivity and thermal sensitivity in GeO2 doped optical fibers. Electron. Lett., 1993, 29(13):1191～1193

[9] Stone J. Interactions of hydrogen and deuterium with silica optical fibers: A review. J. Lightwave Technol., 1987, 5(5):712～733

[10] Kannan S, Guo J Z Y, Lemaire P J et al.. Thermal stability analysis of UV-induced fiber Bragg grating. J. Lightwave Technol., 1997, 15(8):1478～1483

[11] Hand D P, Russell P St J. Photoinduced refractive-index changes in germanosilicate fibers. Opt. Lett., 1990, 15(2):102～104