Thermal response of Bragg gratings in PMMA microstructured optical fibers.
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.
Carroll
Karen E
KE
Zhang
Chi
C
Webb
David J
DJ
Kalli
Kyriacos
K
Argyros
Alexander
A
Large
Maryanne C
MC