An adjustable micro-optoelectronic system supporting bidirectional transmission, an online upgrade, and online configuration. The system includes: a substrate; and edge connectors, a clock-and-data recovery (CDR) chip for transmitting, a CDR chip for receiving, a microprocessor, and an internal optical system, which are provided on the substrate. The edge connectors serve as an interface of a high-speed electrical signal, and are configured to exchange information between the micro-optoelectronic system and an external environment. The internal optical system is configured to transmit and receive an optical signal. A link for the high-speed electrical signal is connected among the edge connectors, the CDR chip for transmitting, the internal optical system, and the CDR chip for receiving. A communication connection is provided between the microprocessor and each of the edge connectors, the CDR chip for transmitting, the CDR chip for receiving, and the internal optical system.

This disclosure describes devices and methods related to multiplexing optical data signals. A method may be disclosed. The method may comprise receiving, by a dense wave division multiplexer (DWDM), one or more optical data signals. The method may comprise combining, by the DWDM, the one or more optical data signals. The method may comprise outputting, by the DWDM, the combined one or more optical data signals to a first circulator. The method may also comprise combining, by the WDM, the second optical data signal and one or more third signals, and outputting an egress optical data signal to an optical switch. The method may also comprise outputing, by the optical switch, the egress optical data signal on a primary fiber.

A method for channel management in an optical network unit includes receiving a disable channel action message sent by an optical line terminal, wherein the disable channel action message is used to instruct disabling a first channel of the optical network unit; transferring the state machine of the optical network unit on the first channel from the association substate of the operation state to the pending substate according to the disable channel action message; and turning off the transmitter and/or the receiver on the first channel after a specified time is reached, transferring the state machine from the pending substate of the operation state to the disabling channel status, and starting a timer.

This disclosure describes devices and methods related to multiplexing optical data signals. A method may be disclosed. The method may comprise receiving, by a dense wave division multiplexer (DWDM), one or more optical data signals. The method may comprise combining, by the DWDM, the one or more optical data signals. The method may comprise outputting, by the DWDM, the combined one or more optical data signals to a first circulator. The method may also comprise combining, by the WDM, the second optical data signal and one or more third signals, and outputting an egress optical data signal to an optical switch. The method may also comprise outputting, by the optical switch, the egress optical data signal on a primary fiber.

An apparatus comprising a signal generator configured to produce a modulation signal, a filter coupled to the signal generator and configured to filter the modulation signal to produce a cancellation signal, and a reflective semiconductor optical amplifier (RSOA) coupled to the signal generator and the filter, wherein the RSOA is configured to generate an optical signal according to a difference between the modulation signal and the cancellation signal and transmit the optical signal towards a partial reflection mirror (PRM).

The invention discloses a communication method includes: receiving, by the ONU by using the first port or the second port, a wavelength switching request message delivered by the OLT, where the wavelength switching request message carries second wavelength channel information and port information that is of the second port; switching, by the ONU, an operating wavelength channel of an optical module connected to the second port from a first wavelength channel to a second wavelength channel corresponding to the second wavelength channel information; and sending, by the ONU, a wavelength switching complete message to the OLT by using the first port. According to the communication method provided in embodiments of the present invention, quick wavelength switching is performed based on the second port, so that a service is not interrupted in a wavelength switching process, and user experience is better.

An OLT comprises: a memory; a processor coupled to the memory and configured to: determine each of a plurality of channels associated with an ONU, select a first channel from among the channels, and generate a first message comprising at least one field instructing enablement or disablement of the first channel; and a transmitter coupled to the processor and configured to transmit the first message to the ONU. A method implemented in an OLT, the method comprises: determining each of a plurality of channels associated with an ONU; selecting a first channel from among the channels; generating a first message comprising at least one field instructing enablement or disablement of the first channel; and transmitting the first message to the ONU.

An optical communication system includes a plurality of optical system nodes, a plurality of optical space switches and a plurality of optical fibers. The plurality of optical system nodes each includes at least one reconfigurable optical add/drop multiplexer (ROADM). The optical system nodes each have at least one client side port and at least one line side port. Each optical space switch is operatively coupled to the line side port of one of the plurality of optical system nodes. Each of the optical fibers couples one of the optical space switches to another of the optical space switches.

The present invention describes a method, system and device for supervising a set of optical fibers of an Optical Network (detecting and locating the failures in deployed optical fibers) which solve some of the problems found in prior art techniques The embodiments of the present invention suggest an innovative approach, which allows to accurately and unambiguously detect and locate failures even in complex point to multipoint optical fiber networks.

An electromagnetic signal transport and distribution system simultaneously transports over one single mode fiber various programming specifically requested by multiple users in multiple locations while simultaneously offering bidirectional communications with a public network.