Dispersion-compensating fiber Bragg gratings with similar to99.9% reflectivity that are made by continuous apodization and phase control are demonstrated. These strong dispersion-compensating gratings provide precision second-order, third-order, or even more complex dispersion compensation, as well as sufficient transmission isolation to be used at add-drop stages without additional filtering. A 99.84% grating with a constant - 700-psm dispersion and a 99.94% grating with dispersion varying linearly from 1000 to - 1000 psm are demonstrated. (C) 2003 Optical Society of America. [References: 9]
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