[1] [1] A. M. Vengsarkar,Y. J. Lemaire,J. B. Judkins et al.. Long-period fiber grating as band-rejection filters[J]. J. Lightwave Technol.,1996,14(1):58-64

[2] [2] R. Falciai,A. G. Mignani,A. Vannini. Long-period gratings as solution concentration sensors[J]. Sens. Actuators B,2001,74(1-3):74-77

[3] [3] Chen Shaohua,Tong Zhengrong,Zhao Qida et al.. A smart bending sensor with a novel temperature-and strain-insensitive long-period grating[J]. Sens. Actuators A,2004,116(1):103-106

[4] [4] Zhao Hongxia,Bao Jilong,Chen Ying. Bending sensing rules for long-period fiber gratings[J]. Acta Optica Sinica,2008,28(9):1681-1685

[5] [5] Gu Zhengtian,Xu Yanping,Deng Chuanlu. Dual-peak resonance and transmission spectrum in coated long-period fiber grating[J]. Acta Optica Sinica,2008,28(2):219-225

[6] [6] Yu Xiujuan,Zhang Min,Wang Liwei et al.. Characteristics of long-period optical fiber grating with high refractive index nm-thick film overlay[J]. Acta Optica Sinica,2009,29(10):2665-2672

[7] [7] Deng Chuanlu,Gu Zhengtian,Zhang Jiangtao. Resonant characteristics of long-period fiber grating coated with double-layer films including metal film[J]. Acta Optica Sinica,2009,29(10):2656-2664

[8] [8] L. A. Wang,C. Y. Lin,G. W. Chern. A torsion sensor made of a corrugated long period fibre grating[J]. Meas. Sci. Technol.,2001,12(7):793-799

[9] [9] Y. P. Wang,Y. J. Rao. Long-period fibre grating torsion sensor measuring twist rate and determining twist direction simultaneously[J]. Electron. Lett.,2004,40(3):164-166

[10] [10] Y. P. Wang,Y. J. Rao. CO2-laser induced LPFG torsion characteristics depending on length of twisted fibre[J]. Electron. Lett.,2004,40(18):1101-1102

[11] [11] Zhu Tao,Rao Yunjiang,Mo Qiuju. A high sensitivity fiber-optic torsion sensor based on a novel ultra long-period fiber grating[J]. Acta Physica Sinica,2006,55(1):249-253

[12] [12] Yu Qingxu,Song Shide,Zhang Guiju et al.. A novel method for fabrication of long period fiber grating with CO2 laser[J]. J. Optoelectron·Laser,2004,15(11):1372-1375

[13] [13] Guan Shouhua,Yu Qingxu,Song Shide et al.. A novel long-period fiber grating torsion sensor[C]. SPIE,2006,6344:63440W

[14] [14] G. D. Van Wiggeren,T. K. Gaylord,D. D. Davis et al.. Axial rotation dependence of resonances in curved CO2-laser-induced long-period fibre gratings[J]. Electron. Lett.,2000,36(16):1354-1355

[15] [15] C. Y. Lin,L. A. Wang. Loss-tunable long period fiber grating made from etched corrugation structure[J]. Electron. Lett.,1999,35(21):1872-1873

[16] [16] Wang Yiping,Chen Jianping,Rao Yunjiang. Study on torsion characteristic of novel long-period fiber grating[J]. Chinese J. Lasers,2005,32(8):1091-1096