A communications network includes a central communication unit, an optical transport medium, and a plurality of remote radio base stations. The central communication unit generates, within a selected millimeter-wave frequency band, a plurality of adjacent two-tone optical frequency conjugate pairs. Each conjugate pair includes a first optical tone carrying a modulated data signal, and a second optical tone carrying a reference local oscillator signal. The optical transport medium transports the plurality of two-tone conjugate pairs to the plurality of radio base stations, and each base station receives at least one conjugate pair at an optical front end thereof. The optical front end separates the first optical tone from the second optical tone, and converts the first optical tone into a millimeter-wave radio frequency electrical signal. The base station further includes a radio antenna system for wirelessly transmitting the millimeter-wave radio frequency electrical signal to at least one wireless receiving device.

An optical network communication system utilizes a passive optical network including an optical hub having an optical line terminal, downstream transmitter, an upstream receiver, a processor, and a multiplexer. The upstream receiver includes a plurality of TWDMA upstream subreceivers. The system includes a power splitter for dividing a coherent optical signal from the optical hub into a plurality of downstream wavelength signals, a long fiber to carry the coherent optical signal between the optical hub and the power splitter, and a plurality of serving groups. Each serving group includes a plurality of optical network units configured to (i) receive at least one downstream wavelength signal, and (ii) transmit at least one upstream wavelength signal. The system includes a plurality of short fibers to carry the downstream and upstream wavelength signals between the power splitter and the optical network units, respectively. Each upstream subreceiver receives a respective upstream wavelength signal.

An OLT (2) includes one or more optical receivers (22) configured to receive optical signals of respective different wavelengths obtained by an AWG filter (4) demultiplexing a wavelength-multiplexed signal addressed to the terminal itself, and a supervisory controller (23) configured to transmit, to an ONU (3), a wavelength adjustment instruction to transit a wavelength to be used by an optical transmitter (32) for transmission of an optical signal, to set a difference between an optical received power of an optical signal received by any of the optical receivers (22) and a reference value of the optical received power within a threshold, the ONU (3) being a transmission source of the optical signal.

A system may use a single fiber combining module (SFCM) that combines multiple wavelength channels of different optical technologies over a single fiber. In an example, a SFCM may include a gigabit passive optical network (GPON) port, wherein the GPON passes signals at a first wavelength range; a XGS PON port, wherein the XGS-PON port passes signals at a second wavelength range; a dense wavelength division multiplexing (DWDM) port, wherein the DWDM port passes signals at a third wavelength range, wherein the first frequency range, the second frequency range, and the third wavelength range are different; and a common port connected with a fiber, the common port simultaneously combining signals from the GPON port, XGS-PON port, and the DWDM port.

A first apparatus in an optical communications network, the first apparatus comprises a transmitter; a receiver; a first MAC; and a first oDSP coupled to the transmitter, the receiver, and the first MAC and configured to communicate a message via a dedicated C&M channel with at least one of the first MAC, a second MAC in a second apparatus in the optical communications network, or a second oDSP in the second apparatus. A method comprises receiving an FS message comprising a PLOAM field, the PLOAM field contains oDSP-related C&M information, and the oDSP-related C&M information comprises a message type ID field and a Message_Content field; reading the message type ID field; and deciding, based on the message type ID field, whether to read the Message_Content field.

The present disclosure provides a network architecture in which the modem in a hybrid metallic-optical fiber access network is moved from the customer premises to the distribution point. Multiple copper pairs can be used to transmit phantom modes over the copper pairs to the distribution point. Alternatively, or in addition, multiple data signals can be transmitted to a single customer premises with the modem collating the multiple data signals at the distribution point.

An OLT (2) includes one or more optical receivers (22) configured to receive optical signals of respective different wavelengths obtained by an AWG filter (4) demultiplexing a wavelength-multiplexed signal addressed to the terminal itself, and a supervisory controller (23) configured to transmit, to an ONU (3), a wavelength adjustment instruction to transit a wavelength to be used by an optical transmitter (32) for transmission of an optical signal, to set a difference between an optical received power of an optical signal received by any of the optical receivers (22) and a reference value of the optical received power within a threshold, the ONU (3) being a transmission source of the optical signal.

An optical network communication system utilizes a passive optical network including an optical hub having an optical line terminal, downstream transmitter, an upstream receiver, a processor, and a multiplexer. The upstream receiver includes a plurality of TWDMA upstream subreceivers. The system includes a power splitter for dividing a coherent optical signal from the optical hub into a plurality of downstream wavelength signals, a long fiber to carry the coherent optical signal between the optical hub and the power splitter, and a plurality of serving groups. Each serving group includes a plurality of optical network units configured to (i) receive at least one downstream wavelength signal, and (ii) transmit at least one upstream wavelength signal. The system includes a plurality of short fibers to carry the downstream and upstream wavelength signals between the power splitter and the optical network units, respectively. Each upstream subreceiver receives a respective upstream wavelength signal.

The present disclosure provide for a radio frequency over glass (RFoG) system having an optical node and an RFoG extender residing in a first service area coupled to the optical node. The RFoG functions to transmit an upstream (US) radio frequency (RF) signal to a head end, receive a downstream (DS) RF signal from the head end and extend the DS RF signal to the second service area. The second service area is different from the first service area and the second service area is remote from the first service area.

A passive optical network device comprising a casing, printed circuit board, and fiber optic transceiver system is provided. The fiber optic transceiver system comprises a fiber optic components device, fiber optic transceiver, and RF connector. During operation, the fiber optic components device converts optical signals from the fiber optic transceiver to digital signals, and then transmits the converted digital signals to external electronic systems via the hot-pluggable transceiver connection interface. The fiber optic components device converts digital signals from the external electronic systems to optical signals, and then transmits the optical signals to other external electronic systems via the fiber optic transceiver. The RF connector transmits RF signals from additional external electronic systems to the external electronic systems via the hot-pluggable transceiver connection interface. The RF connector transmits digital signals from the external electronic systems to the additional external electronic systems via the hot-pluggable transceiver connection interface.