[1] WANG Y P. Review of long period fiber gratings written by CO2 laser[J]. Journal of Applied Physics, 2010, 108(8): 081101.
[2] DENG C L, GU Z T, ZHANG J T. Resonant characteristics and optimization of long period fiber grating coated with weak absorption double-layer films[J]. Acta Photonica Sinica, 2009,38(11): 2873-2879.
[3] JIN Q L, HUANG X H, YAN L F, et al. Optimization of long-period fiber grating for refractive-index sensor[J]. Acta Photonica Sinica, 2011, 40(8): 1201-1204.
[4] SHI L L, ZHU T, FAN Y E, et al. Torsion sensing with a fiber ring laser incorporating a pair of rotary long-period fiber gratings[J]. Optics Communications, 2011, 284(22): 5299-5302.
[5] BRENT L B, THOMAS K G. Polarization-dependent loss and birefringence in long-period fiber gratings[J]. Applied Optics, 2004, 42(34): 6816-6823.
[6] SU Y, ZHANG B F, ZHU Y, et al. Sensing circular birefringence by polarization-dependent parameters in fiber Bragg gratings and the influence of linear birefringence[J]. Optical Fiber Technology, 2012, 18(1): 51–57.
[7] PHILIP O, PAWEL N. Polarization-switching FBG interrogator for distributed point measurement of magnetic field strength and temperature[J]. Sensors Journal IEEE, 2011, 11(5): 1220-1226.
[8] TINKO E, WOJTEK B, PREDRAG M, et al. Single-wavelength polarization-sensitive interrogation of a long-period grating (LPG) sensor[J]. Measurement Science and Technology, 2010, 21: 1299-1304.
[9] TURAN E. Cladding-mode resonances in short- and long-period fiber grating filters[J]. Journal of the Optical Society of America A, 1997, 14(8): 1760-1773.
[10] TURAN E. Cladding-mode resonances in short-and long-period fiber grating filters: errata[J]. Journal of the Optical Society of America A, 2000, 17(11): 2113.
[11] CHARLES T. Optical Fibre Waveguide Analysis[M], UK: Oxford Science Publications, 1992.
[12] CAO H X, BAI Y K, LI J H, et al. Analysis of sensing characteristics of a long-period fiber grating based on two fiber analysis models[J]. Chinese Journal of Laser, 2014, 41(2): 250-258.
[13] NOBUYUKI I, NOBUYUKI Y, JUN I S, et al. Birefringence in single-mode optical fiber due to elliptical core deformation and stress anisotropy[J]. IEEE Journal of Quantum Electronics, 1980, QE-16(11): 1267 – 1271.
[14] LU Y C, HUANG W P, JIAN S S. Full vector complex coupled mode theory for tilted fiber gratings[J]. Optics Express, 2010, 18(2): 713-26.
[15] GIORGIO F, CYNTHIA P S. Representation of the polarization of single-mode fibers using Stokes parameters[J]. Journal of the Optical Society of America, 1981, 71(12): 1487-1491.
[16] FAN Y, ZHU T, SHI L, et al. Highly sensitive refractive index sensor based on two cascaded special long-period fiber gratings with rotary refractive index modulation[J]. Applied Optics, 2011, 50(23): 4604-4610.
[17] GUAN C Y, TIAN X Z, LI S Q, et al. Long period fiber grating and high sensitivity refractive index sensor based on hollow eccentric optical fiber[J]. Sensors & Actuators B Chemical, 2013, 188(11): 768-771.
[18] QI L, ZHAO C L, YUAN J Y, et al. Highly reflective long period fiber grating sensor and its application in refractive index sensing[J]. Sensors & Actuators B Chemical, 2014, 193(3): 185–189.