Abstract
The thermal endurance of fiber Bragg gratings (FBGs), written with
the aid of 193-nm ArF excimer laser irradiation on H2-loaded
Ge/B codoped silica fiber, and pretreated with a CO2 laser and
a subsequent slow cooling process, is investigated. These treated gratings
show relatively less degradation of grating strength during the thermal
annealing procedure. The thermal decay characteristics of treated and
untreated fiber, recorded over a time period of 9 hours, have been
compared. The effect on the Bragg transmission depth (BTD) and the
center-wavelength shift, as well as the growth of refractive-index change
during the grating inscription process for both treated and untreated
fiber, are analyzed.
© 2016 Optical Society of Korea
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