functional block diagram QSFP+ converts parallel

The  Optowiz  QSFP+ is a  parallel  40Gbps  Quad Small Form-factor Pluggable (QSFP)  optical used for data communications applications. It is used to connect switches, network, computers and servers distances of 10km.  QSFP+ transceivers are designed to  with ribbon to duplex fiber breakout cables for connectivity to four 10GBASE-SR interfaces. Maximum channel insertion loss allowed is respectively 2.6dB over 300m of OM3 cable or 2.9dB over 400m of OM4 cable.
The Cisco 40GBASE-SR4 QSFP+ Module supports link lengths of 100m and 150m respectively on laser-optimized OM3 and OM4 multimode fiber cables. It primarily enables high-bandwidth 40G optical links over 12-fiber ribbon r cables terminated outputs electrical signals are also voltage compatible with Common Mode Logic (CML) levels. All data signals are differential and support a data rates up to 10 Gbps per channel. Figure 1 shows