Phase-folding coherent optical technology for optical communication

Abstract

The technology is generally directed to a coherent optical system that performs phase folding for one-dimensional coherent optical signals using a first optical coupler configured to output a first signal portion and a second signal portion, a second optical coupler to receive the first signal portion through a first branch and the second signal portion through a parallel second branch, and a phase-folding time delay unit including at least a first time delay component positioned on the first branch and a second time delay component positioned on the second branch. An output of the second optical coupler is a phase-folded version of the one-dimensional modulated optical signal that is capable of being demodulated by a one-dimensional vector receiver.

Dependencies are inferred from the claim text.