Not 12 Lasers.
That is a "multi-core Fiber" (MCF.) It has 12 cores: effectively twelve spatially-separate optical channels, equivalent to 12 separate fibers in an (extremely) tight bundle. Each of thes cores supports a separate DWDM signal. Each of the many wavelengths within each of these twelve channels requires its own separate laser (or at least its own separate modulator.) The new innovation is the MCD with dramatically reduced cross-talk, and the optics that permit the 12 DWDM signals to be injected into the MCD and extracted from it. There appears to be no new innovation in the DWDM itself.