Study of Temporal Thermal Response of Microfiber Bragg Grating

Abstract

Fiber Bragg grating has been successfully fabricated in the silica microfiber by the use of femtosecond laser point-by-point inscription. Temporal thermal response of the fabricated silica microfiber Bragg grating has been measured by the use of the CO₂ laser thermal excitation method, and the result shows that the time constant of the microfiber Bragg grating is reduced by an order of magnitude compared with the traditional single-mode fiber Bragg grating and the measured time constant is ~ 21ms.

Keywords

Fiber optics sensors / fiber optics and optical communications / fiber optics components

References

[1] Hill K O, Meltz G. Fiber Bragg grating technology fundamentals and overview. Journal of Lightwave Technology, 1997, 15(8): 1263-1276.

[2] Rao Y J. In-fibre bragg grating sensors. Measurement Science and Technology, 1997, 8(4): 355-375.

[3] Kersey A D, Davis M A, Patrick H J, LeBlanc M, Koo K P, Askins C G, . Fiber grating sensors. Journal of Lightwave Technology, 1997, 15(8): 1442-1463.

[4] Dakin J P, Pratt D J, Bibby G W, Ross J N. Distributed optical fibre Raman temperature sensor using a semiconductor light source and detector. Electronics Letters, 1985, 21(13): 569-570.

[5] Li E, Wang X, Zhang C. Fiber-optic temperature sensor based on interference of selective higher-order modes. Applied Physics Letters, 2006, 89(9): 091119.

[6] Dils R R. High-temperature optical fiber thermometer. Journal of Applied Physics, 1983, 54(3): 1198-1201.

[7] Wang C, He J, Zhang J C, Liao C R, Wang Y, Jin W, . Bragg gratings inscribed in selectively inflated photonic crystal fibers. Optics Express, 2017, 25(23): 28442-28450.

[8] Wang C, Zhang J C, Zhang C Z, He J, Lin Y C, Jin W, . Bragg gratings in suspended-core photonic microcells for high-temperature applications. Journal of Lightwave Technology, 2018, 36(14): 2920-2924.

[9] Liao C, Wang D, Li Y, Sun T, Grattan K T V. Temporal thermal response of type II-IR fiber Bragg gratings. Applied Optics, 2009, 48(16): 3001-3007.

[10] Brambilla G, Finazzi V, Richardson D J. Ultra-low-loss optical fiber nanotapers. Optics Express, 2004, 12(10): 2258-2263.

[11] Tong L M, Gattass R R, Ashcom J B, He S, Lou J, Shen M, . Subwavelength-diameter silica wires for low-loss optical wave guiding. Nature, 2003, 426(6968): 816-819.

[12] Liao C, Wang Q, Xu L, Liu S, He J, Zhao J, . D-shaped fiber grating refractive index sensor induced by an ultrashort pulse laser. Applied Optics, 2016, 55(7): 1525-1529.

[13] Lin C, Liao C, Wang J, He J, Ying W, Li Z Y, . Fiber surface Bragg grating waveguide for refractive index measurements. Optics Letters, 2017, 42(9): 1684-1687.

[14] Fang X, Liao C, Wang D. Femtosecond laser fabricated fiber Bragg grating in microfiber for refractive index sensing. Optics Letters, 2010, 35(7): 1007-1009.

[15] Geernaert T, Kalli K, Koutsides C, Komodromos M, Nasilowski T, Urbanczyk W, . Point-by-point fiber Bragg grating inscription in free-standing step-index and photonic crystal fibers using near-IR femtosecond laser. Optics Letters, 2010, 35(10): 1647-1649.

[16] Zhang Y, Lin B, Tjin S C, Zhang H, Wang G, Shum P, . Refractive index sensing based on higher-order mode reflection of a microfiber Bragg grating. Optics Express, 2010, 18(25): 26345-26350.

[17] Ran Y, Tan Y, Sun L, Gao S, Li J, Jin L, . 193nm excimer laser inscribed Bragg gratings in microfibers for refractive index sensing. Optics Express, 2011, 19(19): 18577-18583.

[18] Grellier A J C, Zayer N K, Pannell C N. Heat transfer modelling in CO2 laser processing of optical fibres. Optics Communications, 1998, 152(4–6): 324-328.

[19] Sumetsky M, Dulashko Y, Fini J M, Hale A, Digiovanni D J. The microfiber loop resonator: theory, experiment, and application. Journal of Lightwave Technology, 2006, 24(1): 242-250.

[20] Lewis R W, Nithiarasu P, Seetharamu K N. Fundamentals of the finite element methods for heat and fluid flow, 2004, England: John Wiley & Sons Ltd.