Abstract

We report on the thermal regeneration of tilted Bragg gratings (TFBGs) produced in hydrogen loaded SMF-28 optical fiber using two types of UV lasers: 266 nm femtosecond pulses and 193 nm nanosecond pulses. Different isochronal and isothermal annealing profiles are used to improve the regeneration of the cladding modes. Experimental results are in good agreement with simulation results. We show that TFBGs regenerate efficiently in the temperature range 850 °C – 900 °C when isothermal stepwise annealing profile is used. The regeneration efficiency of the cladding modes does not exceed 4.35%. The sensitivity to the surrounding refractive index is comparable to that of non-regenerated tilted Bragg gratings. These regenerated tilted Bragg gratings can be applied in several applications, like for example the follow up of high-temperature fabrication processes.

Effect of two annealing processes on the thermal regeneration of fiber Bragg gratings in hydrogenated standard optical fibers

Kai Lu, Hangzhou Yang, Kok-Sing Lim, Harith Ahmad, Pan Zhang, Qin Tian, Xiangzi Ding, and Xueguang Qiao
Appl. Opt. 57(24) 6971-6975 (2018)

Observations from direct UV-written, non-hydrogen-loaded, thermally regenerated Bragg gratings in double-clad photosensitive fiber

Alexander Jantzen, Rex H. S. Bannerman, Sam A. Berry, James C. Gates, Paul C. Gow, Lewis J. Boyd, Peter G. R. Smith, and Christopher Holmes
Opt. Lett. 42(19) 3741-3744 (2017)

Influence of pre-annealing on the thermal regeneration of fiber Bragg gratings in standard optical fibers

Patrik Holmberg, Fredrik Laurell, and Michael Fokine
Opt. Express 23(21) 27520-27535 (2015)

Post-hydrogen-loaded draw tower fiber Bragg gratings and their thermal regeneration

Eric Lindner, John Canning, Christoph Chojetzki, Sven Brückner, Martin Becker, Manfred Rothhardt, and Hartmut Bartelt
Appl. Opt. 50(17) 2519-2522 (2011)

Fiber Bragg grating regeneration at 450°C for improved high temperature sensing

Karima Chah, Kivilcim Yüksel, Damien Kinet, Nazila Safari Yazd, Patrice Mégret, and Christophe Caucheteur
Opt. Lett. 44(16) 4036-4039 (2019)