CHIRPED FIBER BRAGG GRATINGS FOR OPTICAL-FIBER DISPERSION COMPENSATION

The use of alpha-power chirped fiber Bragg gratings for dispersion can cellation in an optical fiber link is discussed. Numerical and theoret ical investigation of recompressing the dispersion-broadened pulse by using alpha-power chirped gratings is made, which shows that, the disp ersion-broadened Gaussian pulse after 100 km standard fiber (with zero dispersion at lambda = 1.3 mu m) trnasmission at lambda = 1.55 mu m w ith initial width of T-FWHM = 33ps (full width at half maximum) can be perfectly recompressed with the peak reflectivity of 82% by using a 3 0 mm long alpha-power chirped fiber grating with proper a value and op timal grating parameters.