Abstract
We show in this paper that the Bragg gratings created in perfluorinated CYTOP polymer optical fiber can be tuned thermally over nearly 10 nm when the temperature changes by 60 °C. Furthermore, the thermal stability of these gratings is tested and compared with that of PMMA fiber gratings. Our experimental results demonstrate that the CYTOP polymer fiber grating is more stable than both silica glass fiber grating and the PMMA polymer fiber grating.