Drawing Tower In-Line Fabrication and the Spectrum Analysis of Sampled Fiber Grating

Abstract

Sampled fiber grating is a special superstructure fiber Bragg grating with a wide range of applications in many fields. In this work, based on drawing tower in-line fabrication system, a new preparation method of the sampled fiber grating is proposed and experimentally demonstrated. Experimental result shows that the obtained sampled fiber gratings possess dense reflection spectra, with a minimum reflection peak interval of only 0.09nm. This method exhibits promising application prospect in the fabrication of the high-quality sampled fiber grating. On the other hand, the spectral characteristics of the sampled fiber grating are analyzed when the sub-grating is affected by the external physical quantities such as, in this paper, strain. Wavelength shift and intensity change in the reflection peak of the spectra indicate that the grating is affected differently by micro strains, due to the different spatial positions along the axis of the sampled fiber grating. This work is aimed at exploring the potential applications of the sampled fiber grating in quasi-distributed micro-area sensing with the millimeter level.

Keywords

Sampled fiber grating / drawing tower in-line fabrication / spectrum analysis / grating array / sensing application

References

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

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

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

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

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

[6] Bergonzo A, Jacquet J, de Gaudemaris D. 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] Dai Y, Chen X, Sun J. Dispersion compensation based on sampled fiber Bragg gratings fabricated with reconstruction equivalent-chirp method. IEEE Photonics Technology letters, 2006, 18(8): 941-943.

[8] Zhao W, Liu S, Qi H. Sampled fiber grating for WDM signal queuing with picosecond time interval. Optics & laser Technology, 2017, 97, 302-307.

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

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

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

[12] Zheng Y, Yu H H, Guo H Y. 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] Kogelnik H. Filter response of nonuniform almost-periodic structures. The Bell System Technical Journal, 1976, 55(1): 109-126.

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

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