In a communication system, a light modulator may amplitude modulate a light source based on a data signal, and the resulting modulated light, which conveys the data signal, is transmitted to a distant light receiver. In some situations it is advantageous to be able to transmit multiple data signals with different data rates, simultaneously. A conventional light modulator is limited in that it is not capable of simultaneously amplitude modulating a light source with such data signals having the different data rates. Instead, multiple conventional light modulators must be operated in parallel each to transmit a different one of the data signals. This wastes power and increases costs.
In the drawings, the leftmost digit(s) of a reference number identifies the drawing in which the reference number first appears.