21results about "Star-type electromagnetic networks" patented technology

Provided is an optical communication device including: one or more light distribution units configured to include a first surface having a plurality of first ports and a second surface different from the first surface having a plurality of second ports, have one or more subscriber transmission device ports to which n (n is an integer equal to or greater than 1) subscriber transmission devices are connected and one or more downlink signal ports allocated to the plurality of first ports, have one or more subscriber reception device ports to which n subscriber reception devices are connected and one or more uplink signal ports allocated to the plurality of second ports, and output optical signals input from the first ports from the second ports; and a light distribution control unit configured to control a connection relationship between the plurality of first ports and the plurality of second ports of the one or more light distribution units.

Disclosed herein are methods and systems for optimizing an optical signal in an optical network having a leaf node with a coherent optical transceiver configured to receive an optical signal continuously transmitted at a first output power from a hub node over a link. The leaf node may be provided with signal quality correction circuitry configured to determine a signal quality of the optical signal and send the signal quality to a processor of the hub node. The processor of the hub node may be configured to compare the signal quality of the optical signal to a target signal quality margin, determine that the signal quality is outside the target signal quality margin, adjust the first output power of the optical signal to a second output power different than the first output power, and continuously transmit the optical signal at the second output power.

Methods and systems for determining a receive signal quality of a new subcarrier group in an optical network, including a system in which each leaf node may report a current transmission output power to a hub node when it is determined that a receive signal quality of each of a plurality of subcarrier groups is within a required signal quality margin. A new leaf node may begin transmitting a new subcarrier group at a gradually increasing transmission output power until it reaches the required receive signal quality margin. The new leaf node gradually increases the transmission output power of the new subcarrier group until the hub node determines that any of the plurality of subcarrier groups and the new subcarrier group reached a maximum transmission output power or the signal quality of one or more of the plurality of subcarrier groups and the new subcarrier group begins to degrade.

The present invention discloses an apparatus, for use by an Optical Network Unit, comprising means for: receiving, from an Optical Line Terminal, a broadcast message comprising code set information indicating a first code set selected from a plurality of predefined error correction code sets, determining whether the first code set is comprised in a group of code sets supported by the Optical Network Unit, wherein, said group of code sets comprises at least one code set of the plurality of predefined error correction code sets; encoding predefined upstream transmission with the first code set, in case the first code set is comprised in said group of code sets. The present invention further discloses an apparatus, for use by an Optical Line Terminal, comprising means for: broadcasting code set information indicating a code set selected from a plurality of predefined error correction code sets, in a broadcast message to Optical Network Units; for use by at least one of the Optical Network Units to encode predefined upstream transmission:

A method for controlling an optical module by a board in an optical line terminal (OLT) includes obtaining by, during upstream slot allocation, information such as an identifier of a target optical network unit (ONU) and a target operating rate of the target ONU; sending, by the board, the information to an optical module through a target interface; and determining, by the optical module, an operating parameter based on the information carried in a target message, including determining operating parameters of an equalizer, an amplifier, a filter, and a laser.

A method and a device is provided for managing an operating fault in a laser diode of an optical interface of user equipment of the ONU type. The user equipment is connected by an optical access network of the passive optical network PON type to line termination equipment of the OLT type. The user equipment is enabled to send an optical signal during a time slot allocated to the user equipment in accordance with a time-division multiple access principle. The laser diode is checked as to whether it is transmitting an optical signal outside the allocated time slot and, if so, a message to the line termination equipment is transferred if the fault is detected, deactivation of the laser diode is demanded, and one or more procedures for attempting to correct the fault are implemented.

The present invention discloses a method in an optical line terminal communicatively connected to a plurality of optical network units, comprising: generating a predetermined number of codewords for a downstream frame, wherein, the first N codewords comprise in their first bit values at least one block of b bits of a physical synchronization block corresponding to the downstream frame, N ≥2, b≥1; wherein, the blocks of the physical synchronization block are interleaved on the first N codewords; performing inter-codeword interleaving on the predetermined number of codewords, thereby obtaining a physical layer data frame, wherein, the physical synchronization block forms a consecutive sequence at the beginning of the physical layer data frame; and transmitting the physical layer data frame to the plurality of optical network units.

Systems and methods for operating a passive optical network (PON) extender. The methods comprise: receiving, by the PON extender, a first optical signal from a remote node device of a passive optical network via a first optical link; amplifying the first optical signal using a Raman amplifier of the PON extender to obtain a first Raman amplified optical signal; amplifying the first Raman amplified optical signal using a first optical amplifier of the PON extender to obtain an amplified uplink signal (wherein the first optical amplifier is different than the Raman amplifier); and passing the amplified uplink signal to an optical line terminal via a second optical link (wherein the optical line terminal is disposed locally at a hub site along with the PON extender).

Disclosed herein are methods and systems for dynamically configuring a muxponder. One exemplary system may be provided with a muxponder module deployed in an optical network, the muxponder having an optical receiver, a first and a second electrical port, a demultiplexer having a built-in digital cross-connect, and a processor accessing a mapping table to assign traffic streams associated with a first service identification code to a first and a second host lane of the first electrical port, traffic streams associated with a second service identification code to a third and a fourth host lane of the second electrical port, and having logic to control the digital cross-connect to route a first and a second traffic stream to the first electrical port based on the first service identification code, and a third and a fourth traffic stream to the second electrical port based on the second service identification code.

An optical network unit is configured to send a plurality of optical signals with different wavelengths to an optical line terminal. The optical signals in the plurality of optical signals carry indicating information. The indicating information is used to indicate the wavelength serial number of the optical signal and the temperature information of the laser chip when the optical signal is generated. The optical unit is further configured to receive temperature adjustment information from the optical line terminal; and adjust, based on the temperature adjustment information, the emission wavelength of the laser by adjusting the temperature of the laser chip.

Different aspects of the invention provide a universal monitoring apparatus, and corresponding method, that enables sensing or monitoring of any environmental parameter, no matter what type of backscattering the optical field is subjected to, all signal parameters necessary for estimating all fiber parameters are made available. The invention thus provides a solution that overcomes the complexity, and cost limitations of previous approaches, enabling efficient and non-disruptive environmental monitoring in fiber optic access networks. The monitoring apparatus is completely non-intrusive in the sense that it does not require any modification of the existing optical fiber network, or optical fibers, it is monitoring, as it is simply appended to an existing system and taps into it. The structure of the monitoring apparatus is simple and it allows processing the optical signal speedily, allowing for real-time monitoring of parameters.

Disclosed herein are methods and systems for optimizing signal quality in an optical network having two or more hub nodes continuously outputting optical signals to a plurality of leaf nodes. Each of the plurality of leaf nodes may receive a combined optical signal from the hub nodes and determine an optical power and a signal quality of one optical subcarrier group and send a correction signal to the hub node that sent the subcarrier group. The hub nodes may send a power optimization request comprising the optical power and signal quality of each subcarrier group to a network controller. The network controller may use the optical power and signal quality to determine a power update for an optical power of the subcarrier group(s) and send the power update to the hub node transmitting the subcarrier group. The hub node may adjust the optical power based on the power update.

An optical switching network 1000 includes a plurality of switch devices 100 and a plurality of hosts 200 each comprising at least one network interface controller (NIC). A network data plane and a ne

Optoelectronic interface (2) comprising: - a bandpass filter at the input of which the incoming light signals are applied, and arranged to produce filtered light signals, the bandpass filter being designed to allow all wavelengths of the signal carrier of the plurality of predefined communication protocols to pass through; - a photoreceptor (12); - a processing unit (6) arranged to select a particular software module associated with the particular communication protocol (33p), from among a plurality of different software modules (33a, 33b) each associated with one of the predefined communication protocols.

An apparatus (170) for use in performing diagnostics upon a fibre optic cable (180) in a fibre optic network (100), said apparatus comprising: a reflector (240); a dichroic filter (220) configured to output, from input light transmitted through the fibre optic cable: a reflected component; and a transmitted component; an optical switch (230), arranged to receive the transmitted component and to interface with the reflector, and configured to perform switching between optically connecting and disconnecting the reflector to and from the transmitted component; and a photovoltaic, PV, power supply (250), arranged to receive the reflected component, and electrically connected with the optical switch, thereby to generate power from the reflected component and to power the switching of the optical switch. There is also provided a fibre optic network (100) and a method (300) of operating said network.

Injection-locked transmitter for an optical communications network, comprising: a master seed laser source input that is limited to a single longitudinal mode; an input data stream; and a laser-injected modulator comprising at least one slave laser with a resonator frequency locked to a frequency of the single longitudinal mode of the master-seed laser source, wherein the laser-injected modulator is configured to receive the master-seed laser source input and the input data stream and to output a laser-modulated data stream, characterized by the fact that the transmitter further comprises: a first optical circulator in communication with the laser-injected modulator and the master-seed laser source input; a second optical circulator in one-way communication with the first optical circulator and in two-way communication with the at least one slave laser; and an external modulation element located between the first optical circulator and the second optical circulator, wherein the external modulation element is configured to receive the input data stream and an output from the second optical circulator, where the first optical circulator is in one-way communication with an output of the external modulation element.

Methods, systems, and apparatus for identifying rogue Optical Network Unit (ONU) are disclosed. An Optical Line Terminal (OLT) detects error conditions on a passive optical network (PON) that includes optical networking units (ONUs) transmitting over the PON. The OLT disables and enables different sets of ONUs to identify a rogue ONU that is causing an error condition. The OLT classifies ONUs as a first set of suspect ONUs based on the error condition on another ONU being resolved when the suspect ONUs were disabled. The OLT classifies ONUs as a second set of suspect ONUs that causes the error condition to be present when the suspect ONUs are enabled. The OLT identifies the rogue ONU based on the rogue ONU being included in both of the first set of suspect ONUs and the second set of suspect ONUs.