[1] [1] Othonos A, Kalli K, Kohnke G E. Fiber Bragg gratings: fundamentals and applications in telecommunications and sensing［M］. Massachusetts: Artech House, 1999.

[2] [2] Zhang A L, He P D, Pan H G, et al. Design of electrically controlled double wavelength orthogonal polarization tunable filter［J］. Laser & Optoelectronics Progress, 2015, 52(7): 072301.

[3] [3] Zhu X Y, Liu H L, Ni Y, et al. New Double-Loop desensitization FBG strain sensor［J］. Laser & Optoelectronics Progress, 2018, 55(3): 030605.

[4] [4] Cai H W, Huang R, Qu R H, et al. All-fiber interleave filter using Mach-Zehnder-based sampled fiber gratings［J］.Chinese Journal of Lasers, 2003, 30(3): 243-246.

[5] [5] Tian L, Zhang A L. Dual wavelength filtering properties of phase-shifted fiber Bragg grating and sampled fiber Bragg grating［J］. Chinese Journal of Lasers, 2010, 37(11): 2896-2900.

[6] [6] Zhang Y J, Wang M, Wang Z F, et al. Fabrication of chirped and tilted fiber Bragg gratings and investigation of Raman filtering effect［J］. Acta Optica Sinica, 2017, 37(1): 0106002.

[7] [7] Ibsen M, Eggleton B J, Sceats M G, et al. Broadly tunable DBR fibre laser using sampled fibre Bragg gratings［J］. Electronics Letters, 1995, 31(1): 37-38.

[8] [8] Chow J, Town G, Eggleton B, et al. Multiwavelength generation in an erbium-doped fiber laser using in-fiber comb filters［J］. IEEE Photonics Technology Letters, 1996, 8(1): 60-62.

[9] [9] Ouellette F, Krug P A, Stephens T, et al. Broadband and WDM dispersion compensation using chirped sampled fibre Bragg gratings［J］. Electronics Letters, 1995, 31(11): 899-901.

[10] [10] Guan B O, Tam H Y, Tao X M, et al. Simultaneous strain and temperature measurement using a superstructure fiber Bragg grating［J］. IEEE Photonics Technology Letters, 2000, 12(6): 675-677.

[11] [11] Shu X W, Gwandu B A L, Liu Y, et al. Sampled fiber Bragg grating for simultaneous refractive-index and temperature measurement［J］. Optics Letters, 2001, 26(11): 774-776.

[12] [12] Ibsen M, Durkin M K, Cole M J, et al. Sinc-sampled fiber Bragg gratings for identical multiple wavelength operation［J］. IEEE Photonics Technology Letters, 1998, 10(6): 842-844.

[13] [13] Fang X, He X Y, Liao C R, et al. A new method for sampled fiber Bragg grating fabrication by use of both femtosecond laser and CO2 laser［J］. Optics Express, 2010, 18(3): 2646-2654.

[14] [14] Marshall G D, Williams R J, Jovanovic N, et al. Point-by-point written fiber-Bragg gratings and their application in complex grating designs［J］. Optics Express, 2010, 18(19): 19844-19859.

[15] [15] Zhang L. Research on the fabrication and characteristics of the laser written helical long-period fiber gratings［D］. Shanghai: Shanghai University, 2016: 86-100.

[16] [16] Xu H X. Chiral long period fiber grating and its applications in optical fiber sensing and conversion of the orbital angular momentum of light［D］. Hefei: University of Science and Technology of China, 2013: 103-128.

[17] [17] He X Y, Yu Y L, Huang D, et al. Analysis and applications of reflection-spectrum envelopes for sampled gratings［J］. Journal of Lightwave Technology, 2008, 26(6): 720-728.