Thermal Activation of Regenerated Grating in Hydrogenated Gallosilicate Fiber
Document Type
Article
Publication Date
1-1-2016
Abstract
The thermal regeneration of fiber Bragg gratings inscribed on hydrogenated gallosilicate optical fiber, fabricated using a modified chemical vapor deposition (MCVD) technique followed by a solution doping process, is demonstrated for the first time. A type-I seed grating is thermally regenerated and the evolution of the grating reflectivity in a temperature range between 25 °C and 720 °C is investigated. Temperature responses of 15.2 pm/°C and 15.0 pm/°C are obtained during heating and cooling processes of the regenerated grating (RG), respectively, when performing thermal calibration over a temperature range of 25 °C-750 °C and vice versa. Gallosilicate-based RGs are potential candidates as high-temperature resistant gratings in rare-earth-doped fiber, since they provide high photosensitivity and thermal sustainability with the involvement of a single dopant with a concentration as low as 5 wt%.
Keywords
Gratings, Fiber gratings, Temperature sensors, Optical fibers, Annealing, Optical fiber sensors
Divisions
fac_eng,Science
Funders
University of Malaya: Grant FRGS (FP002-2013B), Grant HIR UM.C/625/1/HIR/181, a/c no: J-21001-73860, and Grant UMRG (RG326-15AFR)
Publication Title
IEEE Sensors Journal
Volume
16
Issue
6
Publisher
Institute of Electrical and Electronics Engineers (IEEE)