[1] A. M. Vengsarkar, P. J. Lemaire, J. B. Judkins et al.. Long period fiber gratings as band rejection filters[J]. J. Lightwave Technology, 1996, 14(1): 58～65
[2] Y. J. Rao, T. Zhu, Z. L. Ran et al.. Novel long-period fiber gratings written by high-frequency CO2 laser pulses and applications in optical fiber communication[J]. Opt. Commun., 2004, (1): 209～221
[7] H. Kawano, H. Muentz, Y. Sato et al.. Reduction of transmission spectrum shift of long-period fiber gratings by a UV-preexposure method[J]. J. Lightwave Technology, 2001, 19(8): 1221～1228
[8] T. Enomoto, M. Shigehara, S. Ishikawa et al.. Long-period fiber grating in a pure-silica-core fiber written by residual stiress relaxation[J]. OFC ′98 Technical Digest, 1998. 277～278
[9] C. Y. Lin, L. A. Wang. Loss-tunable long period fibre grating made from etched corrugation structure[J]. Electron. Lett., 1999, 35(21): 1872～1873
[10] E. Wu, R. C. Yang, K. C. San et al.. A highly efficient thermally controlled loss-tunable long-period fiber grating on corrugated metal substrate[J]. IEEE Photon. Technol. Lett., 2005, 17(3): 612～614
[12] Y. J. Rao, Y. P. Wang, Z. L. Ran et al.. Novel fiber-optic sensors based on long-period fiber gratings written by high-frequency CO2 laser pulses[J]. J. Lightwave TechnoI., 2003, 21(5): 1320～1327
[14] N. Chen, B. F. Yun, Y. P. Cui. Cladding index modulated fiber grating[J]. Opt. Commun., 2006, 259: 587～591
[15] T. Zhu, Y. J. Rao, Q. J. Mo. Simultaneous measurement of refractive index and temperature using a single ultralong-period fiber grating[J]. IEEE Photon. Technol. Lett., 2005, 17(12): 2700～2702
