ADAPTIVE DISPERSION EQUALIZATION BY DETECTING DISPERSION FLUCTUATIONSUSING PM-AM CONVERSION

A novel adaptive dispersion equalisation technique that detects and eq ualises dispersion fluctuations in transmission fibre during data tran smission is proposed. This technique first detects dispersion fluctuat ions in the fibre by using the PM-AM conversion effect at a monitoring wavelength, and then tunes the data wavelength to equalise the fluctu ation. This technique was tested by conducting a 40Gbit/s, 8.5ps pulse transmission experiment over 300km of dispersion-shifted fibre, and w as shown to suppress the sensitivity degradation to below 0.2dB when t he temperature of the fibre was varied between 0 and 40 degrees C.