| CPC H04B 10/532 (2013.01) [H04B 10/548 (2013.01); H04B 10/40 (2013.01); H04B 10/60 (2013.01); H04B 10/61 (2013.01); H04B 10/614 (2013.01); H04J 14/06 (2013.01)] | 14 Claims |
|
1. A coherent optical receiver, comprising:
one or more devices for processing optical signals that include X-polarization components and Y-polarization components, the one or more devices being configured to:
separate the X-polarization components and the Y-polarization components;
rotate the Y-polarization components into a X-polarization space associated with the X-polarization components to form one or more rotated Y-polarization components;
delay the one or more rotated Y-polarization components by one or more symbol periods of duration T to form one or more delayed Y-polarization components;
fold the one or more delayed Y-polarization components into the X-polarization components to form one or more folded optical signals by combining the X-polarization components and the delayed Y-polarization components, wherein the X-polarization components and the delayed Y-polarization components are in the X-polarization space associated with the X-polarization components and the Y-polarization components of the one or more folded optical signals are delayed relative to the X-polarization components of the one or more folded optical signals; and
a phase diversity two dimensional (2D) coherent receiver coupled to the one or more devices to detect the one or more folded optical signals, and
wherein the one or more folded optical signals are interfered with a local oscillator signal to recover one or more I components and Q components of the one or more folded optical signals.
|