Reconfigurable optical quadrature amplitude modulation converter/encoder using a tunable complex coefficient optical tapped delay line.

@article{Khaleghi2013ReconfigurableOQ,
  title={Reconfigurable optical quadrature amplitude modulation converter/encoder using a tunable complex coefficient optical tapped delay line.},
  author={S. Khaleghi and Mohammad Reza Chitgarha and Omer Faruk Yilmaz and Moshe Tur and Michael W. Haney and Carsten Langrock and Martin M. Fejer and Alan E. Willner},
  journal={Optics letters},
  year={2013},
  volume={38 10},
  pages={
          1600-2
        }
}
We experimentally demonstrate a reconfigurable optical converter/encoder for quadrature amplitude modulated (QAM) signals. The system utilizes nonlinear wavelength multicasting, conversion-dispersion delays, and simultaneous nonlinear multiplexing and sampling. We show baud rate tunability (31 and 20 Gbaud) and reconfigurable conversions from lower-order QAM signals to higher-order QAM signals (e.g., 64-QAM). 
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