Coherent optical module

This IA supports a configuration where the digital signal processor (DSP) is on the main board and analog optical components are on the module.

[1] The ACO interface can be used in coherent optics applications when the link delivers a flexible amount of bandwidth to the system, for example when combined with FlexE.

Techniques include Dual Polarization Quadrature Phase Shift Keying (DP-QPSK) and QAM-16.

Coherent optical modules have a series of components inside, some of which have received attention from standards development organizations.

Because coherent modules typically have Digital Signal Processors, these gearbox functions sometimes are implemented in firmware.

Particularly in the long-reach module market, in-module Forward Error Correction (FEC) has been included.

Some pluggable modules fit on top of the printed circuit board instead of on the front panel.