Abstract A dual-polarization, 2-subcarriers code orthogonal, orthogonal frequency division
multiplexed signal carrying information bits is transmitted in an optical communication …

Optical network systems and components are disclosed, including a transmitter comprising a
digital signal processor receiving a plurality of independent data streams, and supplying a …

The filter estimate produced by post-equalization processing of an optical signal at a
receiver is used to generate pre-equalizer filter coefficients that are communicated back to …

Abstract Systems, devices and techniques for receiving a signal comprising a quadrature
duobinary modulated signal include performing channel equalization of the received signal …

Techniques are described for implementing an out-of-band communication channel used to
exchange control channel information in sub-carrier-based optical communication systems …

A network or system in which a hub or primary node may communicate with a plurality of leaf
or secondary nodes. The hub node may operate or have a capacity greater than that of the …

This disclosure describes digitally generating sub-carriers (SCs) to provide isolation and
dynamic allocation of band width between uplink and downlink traffic between trans ceivers …

A transmitter can include a laser operable to output an optical signal; a digital signal
processor operable to receive user data and provide electrical signals based on the data; …

A transmitter can include a laser operable to output an optical signal; a digital signal
processor operable to receive data and provide a plurality of electrical signals based on the …

Methods, systems, transceivers, and apparatus are included for clock synchronizing an
optical system and multiple leaf systems. In some implementations, a transceiver includes a …