Thermal response of Bragg gratings in PMMA microstructured optical fibers
Journal
Optics Express
Date Issued
July 9, 2007
DOI
10.1364/OE.15.008844
Abstract
We report on the thermal characteristics of Bragg gratings fabricated in polymer optical fibers. We have observed a permanent shift in the grating wavelength at room temperature which occurs when the grating has been heated above a threshold temperature. This threshold temperature is dependent on the thermal history of the grating, and we attribute the effect to a shrinking of the fiber. This effect can be avoided by annealing the fiber before grating inscription, resulting in a linear response with temperature and an increased linear operating temperature range of the grating.
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