A software-defined optical Tx is designed and demonstrated generating signals with various
formats and pulse-shapes in real-time. Special pulse-shapes such as OFDM or Nyquist signaling
were utilized resulting in a highly efficient usage of the available fiber channel bandwidth.
This was achieved by parallel data processing with high-end FPGAs. Furthermore highly
efficient Rx algorithms for carrier and timing recovery as well as for polarization
demultiplexing were developed and investigated.
