Fujitsu and KDDI Research large-capacity multiband wavelength multiplexing transmission
Summary
The simulation model reflects the measurement results of the commercial optical fibre characteristics and the transmission parameters extracted by the experimental system verification of the integrated wavelength converter/multiband amplifier. Using this model, Fujitsu realised high-precision simulations that reduce errors from the actual measurement to within 1dB, making it possible to take into account the interaction between bands and the degradation of transmission performance. In this project, Fujitsu and KDDI Research established a design method for multi-band wavelength multiplexing systems by constructing a simulation model that takes into account the interaction between different bands and degradation factors in transmission performance. Moreover, non-linear noise, which often arises in the O-band, is generally difficult to eliminate with digital signal processing technology, thereby diminishing the overall system performance. Minimisation of nonlinear noise in the O band is possible by appropriately setting the transmitted optical power for each densely multiplexed wavelength signal.