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1. An apparatus, comprising: an optical transmitter including: a laser, and a modulator, the laser being operable to supply an optical signal to the modulator, and the modulator being operable to supply a modulated optical signal including a plurality of optical subcarriers based on the optical signal supplied by the laser and a plurality of drive signals; an optical splitter having an input and a plurality of outputs, the input of the optical splitter being optically coupled to the transmitter, such that each of the plurality of outputs of the optical splitter is operable to supply the plurality of optical subcarriers; a plurality of lenses, each of the plurality of lenses being optically coupled to a respective one of the plurality of outputs of the optical splitter, each of the plurality of lenses being operable to receive a corresponding copy of the plurality of optical subcarriers; and a plurality of mirrors, each of the plurality of mirrors being optically coupled to a corresponding one of the plurality of lenses, such that each of the plurality of mirrors is operable to direct a respective copy of the plurality of subcarriers for transmission through free space.
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