We report the fabrication and characterization of wide-band Fabry-Pero
t-like resonators in optical fiber. Using Bragg gratings with variable
detuning, resonators that operate over a wavelength span in excess of
140 nm have been produced, with free spectral ranges between 0.09 nm
and 11.27 nm. Numerical and experimental results for two typical reson
ators are presented, showing good agreement between the two.