A downhole tool conveyable within a wellbore and able to optically communicate with surface equipment. The downhole tool includes a processing system operable to process electronic downlink signals and generate electronic uplink signals. The downhole tool further includes an integrated module having an optical interface able to receive multiplexed optical downlink signals from the surface equipment and to transmit multiplexed optical uplink signals to the surface equipment, a multiplexer/demultiplexer able to demultiplex the multiplexed optical downlink signals into carrier optical downlink signals, and to multiplex carrier optical uplink signals into the multiplexed optical uplink signals, a receiver able to convert the carrier optical downlink signals into the electronic downlink signals, and a transmitter able to convert the electronic uplink signals into the carrier optical uplink signals.