|
Match
|
Document |
Document Title |
|
|
8184979 |
Optical OFDMA network with dynamic sub-carrier allocation
A system and method for dynamically allocating sub-carriers between the nodes of an optical OFDMA ring network or an OFDMA passive optical network. A carrier allocation system assigns sub-carriers...
|
|
|
8180223 |
System and method for extending reach in a passive optical network
In accordance with the teachings of the present invention, a system and method for extending reach in a passive optical network (PON) is provided. In a particular embodiment, a method for extending...
|
|
|
8170418 |
Protected light source for multiple wavelength division multiplexed passive optical networks (WDM-PONS)
A protected light source for generating seed light for at least two wavelength division multiplexed passive optical networks (WDM-PONs). The protected light source includes an optical coupler...
|
|
|
8155521 |
Multi-degree cross-connector system, operating method and optical communication network using the same
Provided are a network node which has a wavelength switching cross-connection function and can thus interconnect paths of a wavelength-division-multiplexed optical signal and convert wavelengths,...
|
|
|
8126329 |
Quad-port optical module with pass-through and add/drop configuration
Techniques are disclosed for providing bi-directional data services involving a plurality of wavelengths. The data services may be hybrid in nature, including both digital and analog data signals....
|
|
|
8103138 |
Tunable filter
A tunable filter is provided. The tunable filter comprises an input optical fiber for launching an optical signal into the tunable filter; a collimator disposed for collimating light transmitted...
|
|
|
8078059 |
Multimode optical transmission device
An optical transmitting circuit (2) modulates multimode oscillation light using an information signal, subjects at least one oscillation-mode light beam of the multimode oscillation light to a...
|
|
|
8077251 |
Photometry apparatus and camera
This invention allows measuring the spectral state of an object more accurately even at low luminance, and implementing high-precision focus detection. A photometry apparatus includes a diffusing...
|
|
|
8078057 |
Centralized congestion avoidance in a passive optical network
In one aspect, a method for congestion avoidance in a passive optical network having an optical line terminal communicatively connected to a plurality of optical network termination devices is...
|
|
|
8050566 |
System and methods for quantum key distribution over WDM links
A system and a method for quantum key distribution between a transmitter and a receiver over wavelength division multiplexing (WDM) link are disclosed. The method includes providing one or more...
|
|
|
8050565 |
Multiservice private network and interface modules for transporting, on such a network, data in different formats
A multiservice private network and interface modules (M1-M5). Each of said modules is dedicated to interfacing a specific terminal equipment (T1-T4, GTW; 310-380) in the multiservice private...
|
|
|
8000604 |
Orthogonal frequency division multiple access (OFDMA) based passive optical network (PON) architecture and its extension to long distance
A passive optical network (PON) device, system and method include an optical line terminal (OLT) receiver configured to receive multiple signals at different wavelengths simultaneously and enable...
|
|
|
7983563 |
Internet protocol routing with optical code division multiple access
Systems, networks, and methods of providing an Internet protocol routing network are disclosed. One Internet protocol routing network includes: a number of local subnet routers, where the routers...
|
|
|
7983562 |
Dynamic coding for optical code-division multiple access
An apparatus and methods for encoding and decoding data are disclosed. The method for transmitting and receiving data allows for coding and decoding each bit of data with a different code. The...
|
|
|
7917038 |
Multimode optical transmission device
An optical transmitting circuit (2) modulates multimode oscillation light using an information signal, subjects at least one oscillation-mode light beam of the multimode oscillation light to a...
|
|
|
7860395 |
Optical access network system
An optical access network system capable of transmitting and receiving high-speed signals and which allows the number of subscribers to be increased without increasing the number of wavelengths...
|
|
|
7848649 |
Method and system to frame and format optical control and data bursts in WDM-based photonic burst switched networks
A wavelength-division-multiplexed based photonic burst switched (PBS) network, which includes edge and switching nodes, optically communicate information formatted into PBS control and data burst...
|
|
|
7844187 |
Optical communications circuit current management
An optical communications circuit has a communications light signal source and a heat pump coupled to cool the signal source. A controller monitors a current and a temperature of the signal source,...
|
|
|
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...
|
|
|
7826749 |
Method and system for quantum key distribution over multi-user WDM network with wavelength routing
A system and a method for quantum key distribution over a multi-user wavelength division multiplexing (WDM) network are disclosed. The system comprises a tunable or multi-wavelength transmitter; a...
|
|
|
7822304 |
Laser beam multiplexer
A laser beam multiplexer capable of easily multiplexing a plurality of laser beams is provided. A laser beam multiplexer includes a multiplexing element having a hollow portion with a sectional...
|
|
|
7809268 |
Integrated optical service channel and quantum key distribution channel
A method for integrating an Optical Service Channel (OSC) with a Quantum Key Distribution (QKD) channel across a DWDM network having a single mode optical fiber is provided. An optical signal is...
|
|
|
7761007 |
***WITHDRAWN PATENT AS PER THE LATEST USPTO WITHDRAWN LIST***
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...
|
|
|
7639947 |
System and methods for quantum key distribution over WDM links
A system and a method for quantum key distribution between a transmitter and a receiver over wavelength division multiplexing (WDM) link are disclosed. The method includes providing one or more...
|
|
|
7620324 |
Optical division multiplexing transmission and reception method and optical division multiplexing transmission and reception device
An object of the present invention is to implement optical multiplexing transmission and reception in which an OCDM channel is added without changing the used wavelength bandwidth of the existing...
|
|
|
7489875 |
System and method for multiple bit optical data transmission in memory systems
The disclosed system and method data increases data transmission speed through a memory system by using optical signals comprising a plurality of wavelengths of light so that each pulse of optical...
|
|
|
7454142 |
Data transmission method and data transmission apparatus
A data transmission method and apparatus is disclosed by which bidirectional transmission of a plurality of optical signals obtained by conversion of a plurality of serial digital data can be...
|
|
|
7444047 |
Multiplexing optical system
A multiplexing optical system includes collimator lenses, a first condensing lens, a second condensing lens and an optical fiber. The collimator lenses collimate divergent laser beams that have...
|
|
|
7421203 |
Method for transmitting packet in wireless access network based on wavelength identification code scheme
A method for transmitting a packet in a wireless access network based on a wavelength identification code scheme. The method comprises the steps of connecting n number of RNCs (Radio Network...
|
|
|
7418205 |
Method and apparatus for controlling a frequency hopping laser
An optical spread spectrum communication system includes a tunable laser which sequentially outputs optical signals having different wavelengths. The laser produces a frequency spectrum having a...
|
|
|
7389048 |
Optical wavelength-division multiple access system and optical network unit
The present invention provides an optical wavelength-division multiple access system and a corresponding optical network unit. A wavelength band Da (wavelengths λd1 to λdn) for downlink optical s...
|
|
|
7386236 |
Multiple wavelength TDMA optical network
A passive optical network which employs multiple wavelengths to increase overall system bandwidth, with each wavelength being shared by multiple optical network units (ONUs) according to a time...
|
|
|
7272319 |
System and method for secure multiple wavelength communication on optical fibers
A method of optical communication having improved security is described. The data content of an initially provided data signal is apportioned among two or more distinct optical wavelength channels....
|
|
|
7212708 |
Optical grating based multiplexer device with power tap capability
In an optical grating device, a grating arrangement receives different wavelength output signals from a plurality of radiation sources at input ports thereof, and generates therefrom a multiplexed...
|
|
|
7164860 |
Advanced multi-protocol optical transport network
A high-speed optical network includes according to the invention a housing having a plurality of slots for accommodating a number of line cards and an optional backplane facilitating communication...
|
|
|
7041959 |
System and method for monitoring the performance of dense wavelength division multiplexing optical communications systems
A system and method for monitoring all the characteristic parameters of a DWDM communication system is implemented with two variants. Firstly, this is achieved by means of a specific grating...
|
|
|
7024121 |
Optical clock signal distribution system in WDM network
Proposed is an optical clock distribution system in the WDM network, which particularly relates to a system to control clock synchronization between optical transmission devices constituting an...
|
|
|
7013086 |
Access node for optical networks with variable-access wavelengths, user device for connection to such an access node, method for feeding a number of signals from a number of users into an optical network and using an access node and at least one user device for carrying out such a method
The access node for optical networks with variable access wavelengths can be connected to user devices via respective first optical conductors and can be connected to the optical network via second...
|
|
|
6765670 |
Spectrometer module and applications thereof
The present invention relates to a spectrometer module comprising an input, for receiving an incoming optical signal, a variable differential group delay (DGD) element, for applying a variable...
|
|
|
5943150 |
Massively parallel processor networks with optical express channels
An optical method for separating and routing local and express channel data comprises interconnecting the nodes in a network with fiber optic cables. A single fiber optic cable carries both express...
|
|
|
5612806 |
Acknowledgement using subcarrier multiplexed tones
Subcarrier multiplexed acknowledgment tones are used for contention recovery in multiple-access WDM networks with basedband data packets and subcarrier multiplexed control headers. Upon receiving a...
|
|
|
5446572 |
Optical interconnects for high speed backplanes using spectral slicing
An n-channel optical interconnect is suitable for use as a high speed, low latency interconnect at a backplane of a parallel processing computer. The interconnect uses spectral slicing to address...
|
|
|
5077728 |
Frequency division multiple access network
An N×N passive star coupler can be used to provide a high performance optical data network to interconnect many users at gigabit rates. Ignoring excessive losses, a signal incident on any input ...
|
|
|
4959826 |
Spread spectrum optical communication system with heterodyne detection
A broad spectrum optical carrier from a source is divided over at least two paths and the carrier in at least one path is modulated in accordance with information. The paths are recombined with...
|