207results about "Bus-type electromagnetic networks" patented technology

To provide an optical interconnection circuit among wavelength multiplexing chips, capable of increasing signal transmission speed and of being easily made minute thereby being simply and easily fabricated, an electro-optical device, and an electronic apparatus, an optical interconnection circuit among wavelength multiplexing chips, which is disposed on a substrate, includes micro-tile shaped elements having a light emitting function or a light receiving function with wavelength selectivity.

An optical network is provided which comprises a plurality of optical network units (19) and optical source means (3) connected and arranged to transmit light signals to each of the plurality of optical network units (19). The optical source means (3) are capable of transmitting light signals at one or more of a plurality of different wavelengths and at least one optical network unit (19) is operable to accept more than one of the said wavelengths. Further, each wavelength of the plurality is accepted by at least one of the optical network units (19) such that each such wavelength is accepted by a different subset of optical network units (19). The optical network further comprises control means (18) operable to cause the optical source means (3) to transmit light signals at one or more selected such wavelengths corresponding to respective desired subsets of the optical network units (19).

The present invention relates to optical communication apparatuses such as OADM node, or OXC node. A receiving dispersion compensating module adjusts the accumulated dispersion of a wavelength-division-multiplexed optical signal such that the accumulated dispersion has an optimum value at a receiver for receiving optical signals in respective wavelength channels which are dropped from the wavelength-division-multiplexed optical signal. An auxiliary dispersion compensating module is provided in a path for an added wavelength group. The auxiliary dispersion compensating module applies the same value of dispersion as the accumulated dispersion adjusted by the receiving dispersion compensating module, to a wavelength-division-multiplexed optical signal in the added wavelength group. Therefore, the accumulated dispersion of a dropped wavelength group has an optimum value, and the accumulated dispersion of a through wavelength group and the accumulated dispersion of the added wavelength group are equalized to each other in a multiplexer.

A network for distributing signals to a plurality of user having a distribution unit and a plurality of optical cables adapted to make the distribution unit communicate with the plurality of user equipment. In turn, each optical cable has an optical fibre having a core, a cladding and a predetermined simple refractive index profile Δn(r). Each optical fibre is adapted to guarantee a single-mode propagation at higher wavelengths than about 1260 nm and a few-mode propagation at about 850 nm, and each optical fibre has such refractive index profile Δn(r) as to guarantee macro-bending losses at 1550 nm that are less than about 0.5 dB and an intermodal delay Δτ at 850 nm that is less than or equal to, about 1 ns/Km.

A network system (10) comprises a master device (5) and a plurality of slave devices (1, 2, 3), and those devices are serially connected to one another in such a way that the master device (5) comes to the most upstream side, thereby configuring an optical multidrop network which ensures data transmission and reception by optical communications among contiguous devices. Each of the slave devices (1, 2, 3) self-controls so as to be in such a state as not to receive data from any slave device on the downstream side when starting an operation, and the master device (5) controls the individual slave devices (1, 2, 3) sequentially from the upstream side to the downstream side in such a way that each slave device is capable of receiving data from a downstream side slave device.

There is provided an optical signal transmission apparatus having a stable dispersion compensation function without unnecessarily controlling a compensation value even when a main signal quality is deteriorated due to a factor other than dispersion or in the case of a transmission failure. When it is determined that a signal quality is deteriorated due to dispersion of a fiber by determining a control mode of a variable dispersion compensator by means of optical noise information and received power information in addition to bit error information of a received signal, a compensation value of the variable dispersion compensator is varied and a compensation value other than the dispersion of the optical fiber is held to an existing set value.

Disclosed is a passive optical network of a bus structure. The passive optical network comprises a central office for wavelength-division multiplexing a plurality of time-division multiplexed downstream optical signals with mutually different wavelengths and receiving upstream optical signals, a plurality of remote nodes positioned in series on an optical path linked to the central office, and a plurality of optical network units for detecting a corresponding downstream channel and being linked with a corresponding remote node in order to transmit each upstream channel to the corresponding remote node, wherein each remote node splits a corresponding downstream optical signal into a plurality of downstream channels and transmits upstream channels to the central office by time-division multiplexing the upstream channels to an upstream optical signal.

An optical transmission apparatus includes a reception part for receiving a wavelength division multiplexed (WDM) signal reached via optical amplifiers; a measuring part for measuring an optical power level of each wavelength of the WDM signal received by the reception part; a determination part for determining whether an amount of tilt of the WDM signal calculated based on measurement results of the measuring part is suitable or not; an operation part for calculating the tilt correction amount to be applied to tilt correction processing performed by the optical amplifiers if the amount of tilt of the WDM signal is not suitable; and a notification part for notifying the optical amplifiers of the tilt correction amount.

The invention discloses a method and a system for a master device to automatically number slave devices, belonging to the technical field of an optical fiber distribution system. The method comprises the following steps that: S1: the master device broadcasts an order of collecting SN sequence numbers of the slave devices; S2: the slave devices return back own SN sequence number information after random delay time; S3: after collecting the SN sequence number information of all the slave devices, the master device forms a SN sequence number and serial number corresponding list, and sends the list to all the slave devices; S4: after receiving the list, the slave devices respectively contrast own SN sequence numbers according to the SN sequence number and serial number corresponding list, find out corresponding serial numbers and generate own unique serial numbers. By automatically and uniquely numbering the slave devices, a problem of collision caused by reporting communication data by multiple slave devices can be avoided, moreover, the SN sequence number, the specific geographical position and the device serial number information of each slave device are maintained at the master device side, thus, state of multiple slave devices can be monitored accurately, project opening efficiency is improved, and later maintenance of the devices is facilitated.

PCT No. PCT/SE96/00323 Sec. 371 Date Nov. 20, 1997 Sec. 102(e) Date Nov. 20, 1997 PCT Filed Mar. 13, 1996 PCT Pub. No. WO96/31025 PCT Pub. Date Oct. 3, 1996An optical node in an optical network includes transmitters (Tx:1-3) and receivers (Rx:1-3) adapted to particular wavelength channels and arranged to communicate via the optical bus network, with receivers and transmitters for corresponding wavelength channels in other nodes. The node includes optical safety switching devices (S1-S5) in connection with the transmitters (Tx:1-3) and receivers (Rx:1-3) of the node, so that the transmitters (Tx:1-3) and receivers (Rx:1-3) can be switched from a first optical fiber (1,2) to a second optical fiber (1,2).

A tactical rail for a firearm includes a rail body having a receiver end and a muzzle end and a non-contact optical connection arranged at an end of the rail body and configured to interface with a corresponding non-contact optical interface. A low speed data bus segment extends between the receiver end and the muzzle end of the rail body. A high speed data spoke is connected to the non-contact optical connection for high speed data communication with a high speed data accessory through the non-contact optical connection and the corresponding non-contact optical interface. Tactical rail systems and firearm assemblies having tactical rails are also described.

The invention discloses a CAN bus physical layer structure based on a 1XN passive optical splitter (POS), comprising a bus state broadcasting unit, a pair of multi-transport networks and a plurality of CAN nodes, which are sequentially connected by optical fibers; the bus state broadcasting unit comprises a lower connective light port and is used for reproducing uplink signals in the CAN bus into downlink signals; a pair of multi-transport networks comprise single or cascaded 1XN POS and are used for transporting the uplink signals and downlink signals; the CAN node comprises a CAN controller and an optical fiber transceiving unit. The CAN bus physical layer structure has excellent anti-electromagnetic interference characteristic and wider network area distribution, and simultaneously improves transmission rate greatly.

The present invention provides methods and systems for efficiently computing optimal optical launch powers for meshed optical networks. The present invention can be utilized to find optimal launch powers for multiple wavelengths in a meshed dense-wave division multiplexed (DWDM) system. Generally, the present invention ensures Q exceeds a threshold for OSNR, and then the launch powers are optimized based on nonlinear penalties. If Q is below the threshold, DWDM equipment changes/additions are incorporated to provide adequate OSNR. The present invention provides a computationally efficient mechanism to optimize launch powers in 10 Gb/s, 40 Gb/s, 100 Gb/s, etc. highly-meshed optical networks.

The invention relates to a system for improving the transmission efficiency of FC-AE-1553 bus, and belongs the technical field of computer communication. On the basis of an original communication mode, a network controller NC can make network exchange with multiple network terminals NT in an alternative access manner, full duplex is realized, the transmission interval of a sequence in the bus is reduced, the bandwidth utilization rate is improved, and the transmission efficiency of FC-AE-1553 bus is improved.

An optical fiber communication system according to the present invention has, for example, first and second phase conjugators. The first phase conjugator converts a signal beam from a first optical fiber into a first phase conjugate beam. The first phase conjugate beam is supplied to the second phase conjugator by a second optical fiber. The second phase conjugator converts the first phase conjugate beam into a second phase conjugate beam. The second phase conjugate beam is transmitted by a third optical fiber. The second optical fiber is composed of a first portion located between the first phase conjugator and a system midpoint and a second portion located between the system midpoint and the second phase conjugator. The total dispersion of the first optical fiber substantially coincides with the total dispersion of the first portion, and the total dispersion of the second portion substantially coincides with the total dispersion of the third optical fiber. By the construction, waveform distortion by chromatic dispersion or nonlinearity is compensated for.

The invention relates to a remote node architecture for a fiber-optic network, especially for low bit-rate data transmission, the fiber-optic network comprising a central node and a plurality of remote nodes serially connected to each other or to the central node, respectively, the central node and the remote node being capable of communicating by means of digital optical signals created by the central node or a respective remote node, each digital optical signal comprising a data frame.

The invention discloses an FCoE protocol acceleration engine IP core based on an AXI4 bus formwork, and belongs to the field of Ethernet fiber channels. The FCoE protocol acceleration engine IP core based on the AXI4 bus formwork is applied to an FCoE fusion network adapter and comprises a transmitting module, a receiving module and a control module. The FCoE protocol acceleration engine IP core is based on the AXI4 bus formwork, a register is configured for the IP core through an AXI4-Lite bus, an AXI4 bus is used for reading and writing a transmitting/receiving descriptor, and an AXI4-Stream high-speed channel is used for transmitting sent/received data. The FCoE protocol acceleration engine IP core can be controlled by a CPU of the FCoE fusion network adapter, the IP core is specially used for meeting the need of FCoE data frame hardware processing in the field of Ethernet fiber channels, a full duplex operating mode is adopted, real-time performance and high efficiency are achieved in operation, the data throughout is large, the transmission rate is high, and lossless transmission can be achieved. The FCoE protocol acceleration engine IP core based on the AXI4 bus formwork can support FCoE data segmenting/merging processing and cannot damage the function of the Ethernet and simple root virtualization.

A high-speed WPAN (Wireless Personal Area Network) system for extending a service area includes an optical fiber serving as a medium for transmitting data; a plurality of pico-nets each including a plurality of devices and a PNC (Pico-Net Coordinator) device for managing the devices; a plurality of two-way signal converters corresponding to the pico-nets, each of the signal converters adapted for converting an optical signal received from the optical fiber into an electrical signal to transmit the electrical signal to the pico-nets, and for converting an electrical signal received from each of the pico-nets into an optical signal to transmit the optical signal to the optical fiber. A plurality of connectors are attached to the optical fiber and the signal converters for transmitting signals input from the optical fiber and the signal converters bidirectionally. One of the PNC devices provided in the pico-nets allocates and manages timeslots for all the devices located in the plurality of pico-nets, and the plurality of pico-nets may be operated as a single logical unit.

An optical network system is provided which has a signal protection function and is able to be constructed of communication nodes manufactured at low costs. An optical signal transceiver has at least one optical signal transmitting device and at least one optical signal receiving device to transmit and receive an optical signal between nodes facing each other. A switching device, when no failure has occurred in the optical signal transmitting communication line and optical signal receiving communication line, transmits an optical signal from the optical signal transmitting device to an optical signal transmitting communication line and an optical signal having been received from the optical signal receiving communication line to an optical signal receiving device. The switching device, when a failure has occurred in the optical signal receiving communication line, does switching so as to be able to receive the optical signal, to be transmitted to the optical signal receiving device, from the optical signal transmitting communication line.

Where an integrated monitoring and controlling unit is to control an optical add-drop unit so as to cause transmit signals from the optical transceiver of a first optical node to be received by the optical transceivers of plural different optical nodes, this purpose can be achieved by an optical transmission system provided with an alarm inhibiting device that can inhibit the optical transceiver, which is a source of transmission, from issuing any unexpected alarm.