Apparatuses, methods, and systems are disclosed for controlling optical
signal wavelength spacing by providing for simultaneous upconversion of a plurality
of electrical signal on subcarrier frequencies of an optical carrier frequency
with or without modulation of an electrical data signal onto the optical carrier
frequency. The optical carrier lightwave is split into a plurality of split lightwaves
upon which one or more electrical frequencies carrying information can be upconverted
onto optical subcarriers of the lightwave carrier frequency. The relative spacings
of the optical subcarrier lightwaves will thus be unaffected by variation in the
carrier frequency. The optical subcarrier lightwaves can then be recombined to
form the optical data signal carrying the plurality of information carried by the
electrical frequencies.
