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PAM-4 or Coherent DWDM for DCI?
Jan. 28, 2020
At the March 2016 OFC conference, Inphi announced its delivery of a 100G, QSFP28, PAM-4, pluggable transceiver with 80km reach. PAM technology has been utilized for 100G transmissions (Inphi is a specialist in this area) before but at much shorter distances. Pulse-amplitude modulation (PAM) is an an ...