An apparatus comprising: a first plurality of N lasers and a second plurality of N lasers, each laser of the first plurality of N lasers and second plurality of N lasers being configured to output a respective optical seed signal having a respective wavelength; a first optical coupler and a second optical coupler respectively coupled with the first plurality of N lasers or the second plurality of N lasers, the first optical coupler and the second optical coupler respectively being configured to multiplex the respective optical seed signals of the first plurality of N lasers and the second plurality of N lasers onto a first plurality of N optical fibers and a second plurality of N optical fibers respectively, such that each optical fiber of the first plurality of N optical fibers and the second plurality of N optical fibers transmits each of the plurality of respective optical seed signals of the first plurality of N lasers and of the second plurality of N lasers to a respective distribution node for distribution to N respective optical network units, wherein the optical seed signals are used to seed respective optical transmitters at the N optical network units; a third plurality of N lasers, wherein the respective wavelengths of the third plurality ofN lasers correspond respectively with the wavelengths of the first plurality of N lasers or the second plurality ofN lasers; and a plurality ofN power monitors coupled respectively with the first plurality ofN lasers or the second plurality of N lasers and the third plurality ofN lasers, each power monitor to provide an indication to a control circuit configured to disable or enable the laser or lasers corresponding with the indication. a first plurality of N lasers and a second plurality of N lasers, each laser of the first plurality of N lasers and second plurality of N lasers being configured to output a respective optical seed signal having a respective wavelength; a first optical coupler and a second optical coupler respectively coupled with the first plurality of N lasers or the second plurality of N lasers, the first optical coupler and the second optical coupler respectively being configured to multiplex the respective optical seed signals of the first plurality of N lasers and the second plurality of N lasers onto a first plurality of N optical fibers and a second plurality of N optical fibers respectively, such that each optical fiber of the first plurality of N optical fibers and the second plurality of N optical fibers transmits each of the plurality of respective optical seed signals of the first plurality of N lasers and of the second plurality of N lasers to a respective distribution node for distribution to N respective optical network units, wherein the optical seed signals are used to seed respective optical transmitters at the N optical network units; a third plurality of N lasers, wherein the respective wavelengths of the third plurality ofN lasers correspond respectively with the wavelengths of the first plurality of N lasers or the second plurality ofN lasers; and a plurality ofN power monitors coupled respectively with the first plurality ofN lasers or the second plurality of N lasers and the third plurality ofN lasers, each power monitor to provide an indication to a control circuit configured to disable or enable the laser or lasers corresponding with the indication.