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

[2] [2] Vengsarkar A M, Pedrazzani J R, Judkins J B et al.. Long-period fiber-grating-based gain equalizers. Opt. Lett., 1996, 21(5):336～338

[3] [3] Rao Y J, Zhu T, Ran Z L et al.. Applications of CO2-induced long-period fiber gratings in Er-doped fiber amplifiers. Proc. SPIE, 2001, 4581:319～326

[4] [4] Costantini D M, Muller C A P, Vasiliev S A et al.. Tunable loss filter based on metal-coated long-period fiber grating. IEEE Photon. Technol. Lett., 1999, 11(11):1458～1460

[5] [5] Sohn I, Kim J, Lee N et al.. Tunable gain-flattening filter using long-period fiber grating based on periodic core deformation. Proc. SPIE, 2001, 4594:110～117

[6] [6] VanWiggeren G D, Gaylord T K, Davis D D et al.. Axial rotation dependence of resonances in curved CO2-laser-induced long-period fibre gratings. Electron. Lett., 2000, 36(16):1354～1355

[7] [7] Rao Y J, Wang Y P, Ran Z L et al.. Characteristics of novel long-period fiber gratings written by focused high-frequency CO2 laser pulses. Asia-Pacific Optical and Wireless Communications 2001, Proc. SPIE, 2001, 4581:327～333

[8] [8] Bhatia V, Vengsarkar A M. Optical fiber long-period grating sensors. Opt. Lett., 1996, 21(9):692～694

[9] [9] Liu Y, Zhang L, Bennion I. Fibre optic load sensors with high transverse strain sensitivity based on long-period gratings in B/Ge co-doped fibre. Electron. Lett., 1999, 35(8):661～662