US Patent 7525461 Optical digital to analog conversion

Embodiments of the present disclosure include apparatuses, systems, and methods of providing optical digital to analog conversion. A method embodiment includes receiving an optical signal that includes a plurality of wavelengths, splitting the received optical signal into a plurality of optical beams each including the plurality of wavelengths, modifying the particular wavelengths present in at least one of the plurality of optical beams based on a digital input, and recombining the plurality of optical beams to produce an optically converted multi-wavelength analog optical signal.