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| Number | Title | Issue Date |
| 7962036 | Fiber optic network adjustment A number of fiber optic networks, nodes, and methods are disclosed. One fiber optic network embodiment includes a network module including a star coupler for receiving a signal from a number of nodes and outputting a combined signal, including the received signals, ... | 06/14/2011 |
| 7826744 | Optical network system and transmission apparatus An optical network system is disclosed by which flexible wavelength path setting can be performed in accordance with tree-shaped and star-shaped network topology. A central node includes a multiplexing section for multiplexing optical signals transmitted from user n... | 11/02/2010 |
| 7761007 | Optical network system and transmission apparatus An optical network system is disclosed by which flexible wavelength path setting can be performed in accordance with tree-shaped and star-shaped network topology. A central node includes a multiplexing section for multiplexing optical signals transmitted from user n... | 07/20/2010 |
| 7440697 | Data bus for a plurality of nodes An apparatus and method for detecting optical defects in optical bus systems which use optical modules in communication with a plurality of nodes connected to each other. Deterioration of the optical transmission quality is detected as a resulting deterioration in a... | 10/21/2008 |
| 7327960 | Receiver transponder for protected networks A receiver transponder to be used in an optical add and drop multiplexer connected in short haul type networks receives light signals from two opposite directions on input fibers (21, 23). The optical input signals are converted to electrical signals by O/E c... | 02/05/2008 |
| 7298975 | Synchronous collapsed ring architecture for real-time signal switching and distribution A method and system includes at least one interconnect hub, connecting the at least one interconnect hub to a plurality of audio connection devices to form a network of audio connection devices with the interconnect hub at the center of the ring. The audio connectio... | 11/20/2007 |
| 7269178 | Resolution of media access contentions in networks comprising a plurality of network nodes and at least one star mode The invention relates to a network comprising a plurality of network nodes. At least part of the network nodes are directly coupled to each other via at least one star node. The star node comprises a plurality of star interfaces which are assigned to at least one ne... | 09/11/2007 |
| 7236708 | Optical communication system with optical output level control function An optical communication system can increase a minimum optical reception level or the number of connectable optical receivers by controlling optical output levels of its optical transmitter. The optical communication system includes the optical transmitter having an... | 06/26/2007 |
| 7236700 | Scalable and exchangeable erbium doped fiber amplifier for DWDM Erbium doped fiber amplifiers for dense wavelength division multiplexed (DWDM) metro area optical networks may be configured as either high gain amplifiers or power amplifiers. The erbium doped fiber type, length, and pump power level are selected so that the shape ... | 06/26/2007 |
| 7170859 | Media converter with integrated local information transmission function and fault alarm signal transmission system There is provided media converter having an integrated local information transmission function and a fault alarm signal communication system for transmitting local information using a frequency outside the communication frequency bands for data signals. In the subsc... | 01/30/2007 |
| 7139484 | Signal transmission method in WDM transmission system, and WDM terminal, optical add-drop multiplexer node, and network element used in the same system Disclosed herein is a signal transmission method in a wavelength-division-multiplex (WDM) transmission system. The WDM transmission system comprises a first WDM terminal for transmitting a WDM signal, a second WDM terminal for receiving the WDM signal, and an optica... | 11/21/2006 |
| 7133616 | Wavelength-selective routing using an optical add/drop architecture A wavelength-selective routing capability is provided in a single network element by configuring the network element using a combination of add/drop network elements to route individual optical channels of WDM signals among a plurality of optical transmission paths ... | 11/07/2006 |
| 7035224 | Activity detection in a star node with a plurality of coupled network nodes The invention relates to a network comprising a plurality of network nodes and one star node, which star node is provided for the direct coupling of at least two network nodes. The star node comprises a plurality of star interfaces which are assigned to at least one... | 04/25/2006 |
| 7032135 | Equipment protection using a partial star architecture Communication apparatus includes a plurality of interface cards, including a central interface card and spoke interface cards, which are adapted to link communication lines to a network. A protection bus includes multiple spoke connections that link the central inte... | 04/18/2006 |
| 6961521 | Method and apparatus for transmitting a bit interleaved optical data stream on an optical network A method and apparatus for transmitting a bit interleaved optical data stream on an optical network is disclosed. In one embodiment, the network includes multiple transmitters that are enabled to transmit an optical bit during established time slots that correspond ... | 11/01/2005 |
| 6915079 | Non-return optical star coupler A passive optical star coupler, and associated method of operation arranged to transmit signals received at any input port to all output ports other than an output port associated with the input port. In this way all received signals are broadcast to all connected n... | 07/05/2005 |
| 6744985 | Data bus for a plurality of nodes A data bus structure for cooperating with a plurality of nodes which are connected to each other. The data bus structure includes optical transmission modules associated with each node and a logical decision gate having inputs associated with each node. The logical ... | 06/01/2004 |
| 6744987 | Tertiary optical media interface An optical superposition network that utilizes a time division multiplexing (TDM) protocol includes a first optical transmitter, a second optical transmitter and a receiver. The first optical transmitter transmits information in a tertiary mode during a time slot. T... | 06/01/2004 |
| 6643465 | Method for checking a ring optical network line for data transmission between a plurality of network subscribers in a motor vehicle A method for checking a ring optical network line for data transmission between a plurality of network subscribers in a motor vehicle, wherein one network subscribers carries out a master function, wherein, apart from the optical network line, there is a ... | 11/04/2003 |
| 6626586 | Remotely configurable optical communication network In a communication network, a logical connections is realized by defined connection paths, with each connection containing at least one connection segment path, whereby a working connection path routed by a "star point" network node and a geographically d... | 09/30/2003 |
| 6445847 | Apparatus and method for achieving a smooth spectral response optical filter A design technique minimizes the loss and ripple in the spectral response of an optical filter formed using a pair of gratings connected by an array of optical elements. This filter can be, for example, two waveguide grating routers (WGRs) connected by an... | 09/03/2002 |
| 6320685 | Data bus for vehicles with a plurality of subscribers In a data bus for vehicles with a plurality of subscribers, said subscribers operating through peripheral S/E modules and an optical transmission line on a central bus, said bus having associated S/E bus modules connected to one another, said modules rece... | 11/20/2001 |
| 5926299 | System for distributing optical signals The invention relates to a system for distributing amplified optical signals, the system comprising an optical star coupler having at least two inputs, each input of said coupler being connected to the output of a respective optical amplifier whose input ... | 07/20/1999 |
| 5896213 | Optical fiber network system Disclosed is an optical fiber network system which has optical transmitter-receivers disposed in optical network units(ONUs) of number N. an optical transmitter-receiver in a central office which is connected with the ONUs through a passive splitter to fo... | 04/20/1999 |
| 5889906 | Signal router with coupling of multiple waveguide modes for provicing a shaped multi-channel radiation pattern A signal router includes a free space region with input and output sides. A number of input and output waveguide arms extend from the respective input and output sides of the free space region. At least a subset of the input or output waveguide arms are c... | 03/30/1999 |
| 5872644 | Fiber-optic access system for subscriber optical communication A fiber-optic access system for subscriber optical communication adopting star type topology in an optical fiber network includes a central office, a plurality of optical network units, an optical interface, and a signal recognition/reproduction and clock... | 02/16/1999 |
| 5739935 | Modular optical cross-connect architecture with optical wavelength switching An optical cross-connect node architecture interfaces plural optical fiber input and output links, each link containing plural wavelength channels. In one embodiment, the input links are connected to a single optical coupler, or alternatively, to an assoc... | 04/14/1998 |
| 5724166 | Information sharing method for a plurality of nodes in communication system and communication system In a communication system, communication is performed by connecting a plurality of nodes via a signal line. In the system, the same information is shared in the plurality of nodes in accordance with the following manner. Information to be shared is encode... | 03/03/1998 |
| 5724167 | Modular optical cross-connect architecture with optical wavelength switching An optical cross-connect node architecture interfaces plural optical fiber input and output links, each link containing plural wavelength channels. In one embodiment, the input links are connected to an optical coupler. Pairs of tunable optical filters an... | 03/03/1998 |
| 5604748 | Information processing apparatus for transmitting information among a plurality of nodes and arbitration method in such information processing apparatus An information processing apparatus transmits data among a plurality of nodes connected to a common transmission line. An arbiter selectively gives use permission, to use the common transmission line for transmitting data, to one of the nodes that request... | 02/18/1997 |
| 5602663 | Information processing apparatus for multiplex transmission of signal for arbitration and signal for data transfer An information processing apparatus has a plurality of computational nodes including a multiplexer and a demultiplexer. A concentrator is connected to the nodes and simultaneously transmits multiplexed signals thereto. An arbiter arbitrates the use of a t... | 02/11/1997 |
| 5570226 | Optical link amplifier and a wavelength multiplex laser oscillator The present invention provides an optical link amplifier which reduces the attenuation of the optical signal passing through optical an link amplifier so as to have a fail-safe function to ensure the communication path of an optical signal even if abnorma... | 10/29/1996 |
| 5561542 | Optical communication system and method for performing communication under clock control In an optical communication system, a plurality of apparatuses are connected by a star coupler. A signal from each of the optical communication apparatuses is received by a receiving device such as a photodiode while a signal to each of the apparatuses is... | 10/01/1996 |
| 5523869 | System and method for line-conducted digital communication A system is disclosed, which operates with active units for the line-conducted, digital transmission of communications between the exchange of a telecommunication network and subscribers connected thereto. At least one cross connector, operating with acti... | 06/04/1996 |
| 5443227 | Switching control for multiple fiber-guided missile systems A fast and reliable switch (50) for multi-channel, bi-directional fiber optics data link (FODL) systems. The FODL channel switching is accomplished through a software command on the subcarrier frequency (SCF) code without using any moving components or wa... | 08/22/1995 |
| 5396358 | Optical reflective star device Optical reflective star device for transmitting signals between a plurality of transceivers, provided with a plurality of ports for distributing each signal supplied to one port over the other ports. The reflective star device is made up of a plurality of... | 03/07/1995 |
| 5343314 | Optical fiber communication method and multimedia optical fiber network using the same The present invention discloses an optical fiber communication system for an optical network in which a plurality-of types of communication terminal equipments are connected to one another via optical fibers, the optical fiber communication system, being ... | 08/30/1994 |
| 5341232 | Star-shaped network for data communication between stations The invention concerns a process for data transmission between stations in a star-shaped network in which star couplers are arranged at the branches of the network. The active, asymmetrical star coupler used in the network transmit flows of signals receiv... | 08/23/1994 |
| 5307191 | Communications method and network with frequency allocation Calls are made in known manner between terminals in the form of information-carrying modulation applied to emission waves that travel along common transmission lines. An emission frequency (F(2P-1)) is allocated to each terminal for each call. According t... | 04/26/1994 |
| 5301052 | Communication method and network using optical fibers with frequency multiplexing The emission frequencies (F(1) . . . F(2P)) used for simultaneous communications form a stack extending from a fixed based frequency (F(0)) to a top of stack frequency (F(2P-1), F(2-P)). At the beginning of each call, the emission frequency (F(2P-1)) used... | 04/05/1994 |
