A nonlinearly chirped fiber grating for achieving tunable dispersion compensation, dispersion slope compensation, polarization mode dispersion, chirp reduction in directly modulated diode lasers, and optical pulse manipulation. A dynamical dispersion compensation mechanism can be implemented in a fiber...http://www.google.com/patents/US6330383?utm_source=gb-gplus-sharePatent US6330383 - Disperson compensation by using tunable nonlinearly-chirped gratings
