Abstract

For high-speed coherent transmission, homodyne phase diversity receivers seem to offer significant advantages over heterodyne or conventional homodyne schemes. An optical phase-locked loop is not needed, and the bandwidth can be kept low compared to heterodyne schemes. On the other hand, diversity receivers require two or more identical signal processing branches.^1,2 In particular, the gain and relative phase in the branches are required to be ideally matched.

© 1989 Optical Society of America