Duobinary IQ Modulation Schemes for C- and O-band PAM4 Direct Detect Systems
26 April 2018
We present two novel modulation schemes for PAM4 direct detect systems employing duobinary signals as least and most significant bit. One format, designed for C-band, is experimentally demonstrated at 70 GBaud. The other, for O-band, is compared to conventional PAM4.
