FIBER BRAGG GRATING FABRICATION FOR DISPERSION SLOPE COMPENSATION

Group-delay dispersion slope causes signal deterioration in long-dista nce high-data-rate communication systems, We report the fabrication of high quality apodized and chirped fiber gratings with dispersion slop es as high as -1800 ps/nm(-2) over a 0.7-nm bandwidth-sufficient to co mpensate for the dispersion slope of > 25 000-km length of standard fi ber at a wavelength of 1550 nm. We believe this is the first time that fiber Bragg gratings have been specifically designed and fabricated f or dispersion slope compensation, The fabrication technique uses a sta ndard unchirped phase mask and two scans of the inscribing UV beam.