A fiber link module, FLM, in a passive optical network that includes at least one optical line terminal, OLT, and at least one optical network unit, ONU, the FLM comprising: an upstream multiplex conversion device, MCD, comprising: an upstream optical receiver configured to receive an upstream optical signal from said at least one ONU, the upstream optical receiver including a photodiode configured to convert the upstream optical signal to an upstream electrical signal; and an upstream optical transmitter configured to transmit a regenerated upstream optical signal to said at least one OLT, the upstream optical transmitter including a laser configured to convert the upstream electrical signal to the regenerated upstream optical signal; wherein the upstream optical receiver is a burst-mode receiver electrically coupled to the upstream optical transmitter; and the upstream optical receiver and the upstream optical transmitter are configured to provide an enable/disable signal for the laser from the upstream optical receiver to the upstream optical transmitter; and a downstream MCD comprising: a downstream optical receiver configured to receive a downstream optical signal from said at least one OLT, wherein the downstream optical signal is a wavelength division multiplexing, WDM, signal; and a downstream optical transmitter configured to transmit a regenerated downstream optical signal to said at least one ONU, wherein the downstream optical receiver is electrically coupled to the downstream optical transmitter. an upstream multiplex conversion device, MCD, comprising: an upstream optical receiver configured to receive an upstream optical signal from said at least one ONU, the upstream optical receiver including a photodiode configured to convert the upstream optical signal to an upstream electrical signal; and an upstream optical transmitter configured to transmit a regenerated upstream optical signal to said at least one OLT, the upstream optical transmitter including a laser configured to convert the upstream electrical signal to the regenerated upstream optical signal; wherein the upstream optical receiver is a burst-mode receiver electrically coupled to the upstream optical transmitter; and the upstream optical receiver and the upstream optical transmitter are configured to provide an enable/disable signal for the laser from the upstream optical receiver to the upstream optical transmitter; and an upstream optical receiver configured to receive an upstream optical signal from said at least one ONU, the upstream optical receiver including a photodiode configured to convert the upstream optical signal to an upstream electrical signal; and an upstream optical transmitter configured to transmit a regenerated upstream optical signal to said at least one OLT, the upstream optical transmitter including a laser configured to convert the upstream electrical signal to the regenerated upstream optical signal; wherein the upstream optical receiver is a burst-mode receiver electrically coupled to the upstream optical transmitter; and the upstream optical receiver and the upstream optical transmitter are configured to provide an enable/disable signal for the laser from the upstream optical receiver to the upstream optical transmitter; and a downstream MCD comprising: a downstream optical receiver configured to receive a downstream optical signal from said at least one OLT, wherein the downstream optical signal is a wavelength division multiplexing, WDM, signal; and a downstream optical transmitter configured to transmit a regenerated downstream optical signal to said at least one ONU, wherein the downstream optical receiver is electrically coupled to the downstream optical transmitter. a downstream optical receiver configured to receive a downstream optical signal from said at least one OLT, wherein the downstream optical signal is a wavelength division multiplexing, WDM, signal; and a downstream optical transmitter configured to transmit a regenerated downstream optical signal to said at least one ONU, wherein the downstream optical receiver is electrically coupled to the downstream optical transmitter.