Geometrical and Phasor Representation of Multi-level Amplitude-Phase Modulation Formats and Photonic Transmitter Structures

We describe a geometrical and phasor representation of multi-level amplitude and phase modulation. Based on this representation, the modulation of the lightwave carrier is described using single dual-drive Mach Zehnder interferometric modulator. The generation of optical multilevel amplitude and phase constellations (oMASK or oMPSK) is designed for effective photonic transmission. A number of photonic transmitter structures for the modulation schemes are briefly compared. The driving voltage levels are calculated and the phasor diagrams are developed to demonstrate the effectiveness of modulation schemes. Simulink models are developed to generate the advanced modulation formats for optical fibre communications. Experimental demonstrations will be illustrated.