THE DESIGN OF IN-FIBER BRAGG GRATING SYSTEMS FOR CUBIC AND QUADRATIC DISPERSION COMPENSATION

Using a simple group delay model we calculate the dispersion terms of quadratically chirped in-fiber Bragg gratings and hence the design par ameters for using such devices to provide cubic and quadratic dispersi on compensation. The model results are compared with numerical simulat ions and we discuss how these devices may be used to produce the chara cteristics required for dispersion compensation in fibre optic communi cation systems. In particular we show that a system comprising a reali zable pair of fibre-gratings could allow for the compensation, with a bandwidth of 1 nm, of cubic dispersion equivalent to 800 km of standar d optical fibre.