[1] [1] W. H. Loh, F. Q. Zhou, and J. J. Pan, “Sampled fiber grating based-dispersion slope compensator,” IEEE Photonics Technology Letters, 1999, 11(10): 1280–1282.

[2] [2] O. Frazao, R. Romero, and G. Rego, “Sampled fiber Bragg grating sensors for simultaneous strain and temperature measurement,” Electronics Letters, 2002, 38(14): 693–695.

[3] [3] H. P. Li and Y. L. Sheng, “Phased-only sampled fiber Bragg gratings for high-channel-count chromatic dispersion compensation,” Journal of Lightwave Technology, 2003, 21(9): 2074–2083.

[4] [4] J. HüBner, D. Zauner, and M. Kristensen, “Strong sampled Bragg gratings for WDM applications,” IEEE Photonics Technology Letters, 1998, 10(4): 552–554.

[5] [5] V. Jayaraman, D. A. Cohen, and L. A. Coldren, “Demonstration of broadband tunability in a semiconductor laser using sampled gratings,” Applied Physics Letters, 1992, 60(19): 2321– 2323.

[6] [6] A. Bergonzo, J. Jacquet, and D. de Gaudemaris, “Widely Vernier tunable external cavity laser including a sampled fiber Bragg grating with digital wavelength selection,” IEEE Photonics Technology Letters, 2003, 15(8): 1144–1146.

[7] [7] Y. Dai, X. Chen, and J. Sun, “Dispersion compensation based on sampled fiber Bragg gratings fabricated with reconstruction equivalent-chirp method,” IEEE Photonics Technology Letters, 2006, 18(8): 941–943.

[8] [8] W. Zhao, S. Liu, and H. Qi, “Sampled fiber grating for WDM signal queuing with picosecond time interval,” Optics & Laser Technology, 2017, 97: 302–307.

[9] [9] H. Y. Guo, J. G. Tang, and X. F. Li, “On-line writing identical and weak fiber Bragg grating arrays,” Chinese Optics Letters, 2013, 11(3): 030602.

[10] [10] H. Y. Guo, H. H. Yu, and W. Y. Wu, “Preparation of photosensitive fibers for weak fiber Bragg grating arrays,” Physics Procedia, 2013, 48: 184–190.

[11] [11] Z. Luo, H. Wen, and H. Guo, “A time- and wavelength-division multiplexing sensor network with ultra-weak fiber Bragg gratings,” Optics Express, 2013, 21(19): 799–807.

[12] [12] Y. Zheng, H. H. Yu, and H. Y. Guo, “Analysis of the spectrum distortions of weak fiber Bragg gratings fabricated in-line on a draw tower by the phase mask technique,” Journal Lightwave Technology, 2015, 33(12): 2670–2673.

[13] [13] H. Kogelnik, “Filter response of nonuniform almost-periodic structures,” The Bell System Technical Journal, 1976, 55(1): 109–126.

[14] [14] M. Yamada and K. Sakuda, “Analysis of almost-periodic distributed feedback slab waveguides via a fundamental matrix approach,” Applied Optics, 1987, 26(16): 3474–3478.

[15] [15] H. Ke, K. S. Chiang, and J. H. Peng, “Analysis of phase-shifted long-period fiber gratings,” IEEE Photonics Technology Letters, 1998, 10(11): 1596–1598.