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Optical Communications > Multiplex > Wavelength Division Or Frequency Division (e.g., Raman, Brillouin, Etc.)

Wavelength Division Or Frequency Division (e.g., Raman, Brillouin, Etc.)

Wavelength Division Or Frequency Division (e.g., Raman, Brillouin, Etc.) patent applications listed include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.

10/30/14 - 20140321856 - Wavelength multiplexed transmitter optical module
A transmitter optical module is disclosed. The transmitter optical module has optical sources each emitting optical beam with a specific wavelength different from others and lenses corresponding to the optical sources. The optical sources and the lenses are mounted on a carrier. The carrier provides grooves surrounding rectangular areas where...

10/23/14 - 20140314417 - Reconfiguration of an optical connection infrastructure
An optical connection infrastructure has optical conduits between first devices and at least one second device. Dynamic reconfiguration of the optical connection infrastructure can be performed from a first connection topology to a second, different connection topology based on programming of the first devices....

10/16/14 - 20140308039 - Equalizing a signal modulated using a 5qam modulation format
An optical system may include an optical transmitter or an optical receiver. The optical transmitter may include a laser to provide an input signal, a first digital signal processor (DSP) to receive a data signal, provide non-rotated and rotated symbols corresponding to the data signal, and provide digital signals corresponding...

10/16/14 - 20140308040 - Optical path computation based on a reachability matrix
Methods and systems for optical path computation based on a reachability matrix may rely on matrix multiplication to determine a number and respective network locations of regenerators for establishing an end-to-end reachable path in an optical network between a source node and a destination node. The reachability matrix may specify...

09/18/14 - 20140270778 - Bidirectional optical data communications module
An optical transceiver module includes N light sources, N light detectors, a bidirectional fiber port, and an optical network having 2N−1 wavelength-selective elements. The number 2N represents the total number of transmit and receive channels in a bidirectional system in which transmit and receive signals corresponding to the transmit and...

09/18/14 - 20140270779 - Wavelength selection and configuration method for multi-wavelength optical communication system
Provided is an OLT including a wavelength splitter that splits all upstream optical signals with different wavelengths received from at least one ONU according to wavelength, at least one receiver that receive the optical signals split by the wavelength splitter according to wavelength, a wavelength selector that allocates an upstream...

09/18/14 - 20140270780 - Apparatus and method for forward error correction over a communication channel
There are various drawbacks by using existing OTN (Optical Transport Network) frames for communication between OTN cards. Such drawbacks might for example include high latency, low robustness, and/or high coding rate. According to embodiments of the present disclosure, systems and methods are provided for modifying an OTN frame (or creating...

09/11/14 - 20140255033 - Increasing the capacity of a wdm-pon with wavelength reuse
A method of processing optical signals in a passive optical network includes receiving a first signal in a first optical spectrum, and receiving a second signal in a second optical spectrum. The second optical spectrum is different from the first optical spectrum. The method also includes multiplexing the first and...

09/04/14 - 20140248056 - Wavelength real time display on the equipment for wdm optical networking systems with wavelength tunable capability
A wavelength tunable device for use in a wavelength division multiplexing (WDM) system comprising a display device for displaying at least one operating wavelength of the wavelength tunable device. The display device is electrically coupled to a control unit in the wavelength tunable device so as to display the tuned...

08/28/14 - 20140241728 - Method and system for receiving an optical-duo-binary signal
The invention inter alia relates to a method of receiving an optical-duo-binary, ODB, signal (S), which has a predefined ODB-transmission bit-rate (B), using a photoreceiver, said method comprising the step of filtering the ODB signal using a filter (10) which provides a frequency peak in the photoreceiver's frequency response located...

08/21/14 - 20140233956 - Allocation of spectral capacity in a wavelength-division multiplexing optical network
A method for allocating spectral capacity in a WDM optical network comprising: —providing (4) a group of connection demands, —defining a group of candidate lightpaths that are adapted to carry an optical signal transparently, —defining a highest admissible spectral efficiency for each candidate lightpath, —computing (6) a respective spatial path...

08/14/14 - 20140226985 - Virtual networking embedding procedure in an optical wavelength division multiplexing (wdm) network
consecutive spectrum slots at M lowest wavelengths in the bit map of selected route k, and (f) determining fragmentation factor Fkm after provisioning a channel at each wavelength m on selected route k, where 1≦m≦M. Other apparatuses, systems, and methods also are disclosed....

08/07/14 - 20140219662 - Signal detection circuit and optical transmission equipment
A signal detection circuit includes: a first optical filter configured to filter an optical signal carrying a frequency modulated signal with a first transmission band; a second optical filter configured to filter the optical signal with a second transmission band; a first photo detector configured to convert the output light...

07/24/14 - 20140205296 - Method for split spectrum signalling in an optical network
The example embodiments presented herein are directed towards an Optical Network Element, ONE, node (14), and corresponding method therein, for establishing multiple spectral routing in an optical transport network. The establishment of the multiple spectral routing features the use of a Split-Spectrum Label, SSL, (11) which comprises multiple definitions for...

07/24/14 - 20140205297 - Method, system, and apparatus for transmitting data information by using optical signals
A method, a system, and an apparatus for transmitting data information by using optical signals are disclosed. The method includes: selecting at least two optical carriers, where the at least two optical carriers correspond to at least two optical frequency slots, and a vacant optical frequency slot or an optical...

07/17/14 - 20140199074 - Orthogonal frequency division multiple access-passive optical network comprising optical network unit and optical line terminal
An orthogonal frequency division multiple access-passive optical network including a plurality of optical network units each configured to generate orthogonal frequency division multiplexed signals, which are allocated thereto, based on a central frequency for frequency division multiplexing that is allocated in advance, and to use the generated signals in upstream...

07/17/14 - 20140199075 - Apparatus and method for controlling multicarrier light source generator
An apparatus and method for controlling a multicarrier light source generator are provided. The apparatus includes N-light source input units configured to input light sources to a multicarrier light source generator that generates multicarrier light sources at a frequency interval of F [Hz], and a control unit configured to adjust...

07/10/14 - 20140193153 - Methods and apparatus to multiplex light signals
Methods and apparatus to multiplex light signals are disclosed herein. An example method includes conveying a first light signal via a first optical path and conveying a second light signal via a second optical path. The example method also includes frequency-division multiplexing and time-division multiplexing the first light signal and...

07/10/14 - 20140193154 - Subchannel security at the optical layer
The present invention includes various novel systems and methods for dynamically modifying WDM transmission and receive steps (individually or in combination), including encoding client signals, mapping them to subchannels within or across ITU channels, modulating them onto subcarrier frequencies, and multiplexing them together for optical transmission. By dynamically modifying one...

07/03/14 - 20140186041 - Physical-layer channel bonding
A network device includes a plurality of physical-media entities (PMEs), each corresponding to a distinct channel, to generate transmit signals based on transmit packets received over a media-independent interface. The network device also includes a channel-bonding sublayer to direct the transmit packets from the media-independent interface to respective PMEs of...

07/03/14 - 20140186042 - Optical receiver having wavelength recognition function, and device and method for recognizing wavelengths using the same
Provided are an optical receiver having a wavelength recognition function, and a device and method for recognizing wavelengths using the same. The optical receiver according to an embodiment of the invention includes a splitter configured to split light intensity of input optical signals, a first receiver configured to photoelectrically convert...

06/19/14 - 20140169793 - Frequency domain multiplex optical transmission
A method of transmitting a data signal in an optical communications system. The method includes processing the data signal to generate an analog drive signal, wherein the processing comprises applying a first non-linear operation such that frequency components of the drive signal lay in at least two separated spectral bands....

06/12/14 - 20140161457 - Thermally isolated multi-channel transmitter optical subassembly and optical transceiver module including same
A thermally isolated multi-channel transmitter optical subassembly (TOSA) may be used in a multi-channel optical transceiver. The multi-channel TOSA generally includes an array of lasers optically coupled to an arrayed waveguide grating (AWG) to combine multiple optical signals at different channel wavelengths. The lasers, and possibly other components, are wire...

06/12/14 - 20140161458 - Method and apparatus for increasing a transmission performance of a hybrid wavelength division multiplexing system
A hybrid wavelength division multiplexing system wherein one or more intensity modulated signals generated by optical amplitude modulators are co-propagated with one or more phase modulated signals generated by optical phase modulators, wherein a drive voltage of said optical amplitude modulator is adapted to reduce an extinction ratio of the...

06/12/14 - 20140161459 - Thermally shielded multi-channel transmitter optical subassembly and optical transceiver module including same
A thermally shielded multi-channel transmitter optical subassembly (TOSA) may be used in a multi-channel optical transceiver. The multi-channel TOSA generally includes an array of lasers optically coupled to an arrayed waveguide grating (AWG) to combine multiple optical signals at different channel wavelengths. A plurality of laser array thermal shields are...

06/12/14 - 20140161460 - Method and apparatus for transporting a client signal over an optical network
A method of transporting a client signal across an optical transport network (OTN) comprises dividing a received client signal into a plurality of parallel signals at a lower bit rate. The parallel signals are mapped into a respective number of optical data unit (ODUs), each ODU having payload bytes and...

06/12/14 - 20140161461 - Time and wavelength division multiplexing - passive optical network (twdm-pon) system and communication link method thereof
A Time Wavelength Division Multiplexing-Passive Optical Network (TWDM-PON) system and a communication link method thereof are provided. The communication link method is a method whereby an Optical Network Unit (ONU) which has established communication link to one Optical Line Terminal (OLT) establishes communication link to a different OLT. The ONU...

06/05/14 - 20140153925 - Transmission control device, transmission system, and transmission method
A transmission control device includes a subcarrier selector configured to select one or more subcarriers for transmitting an error correction code for correcting data, from a plurality of subcarriers having different transmission capacities, each of the plurality of subcarriers used for transmitting either of the data and the error correction...

05/29/14 - 20140147120 - Grooming multicast traffic in flexible optical wavelength division multiplexing wdm networks
The present invention is directed to a solution for grooming multicast traffic in flexible optical wavelength division multiplexing WDM networks. The invention includes a solution for grooming multicast traffic in flexible optical wavelength division multiplexing networks into a solving a multicast routing sub-problem, solving a a grooming sub-problem; and solving...

05/15/14 - 20140133861 - Opportunistic bandwidth stealing in optical networks
In a multi-chip module (MCM), integrated circuits are coupled by optical waveguides that convey optical signals. The optical waveguides provide dedicated point-to-point optical links between all pairs of the integrated circuits. Moreover, for a given point-to-point optical link between a given pair of integrated circuits, other integrated circuits in the...

05/15/14 - 20140133862 - Receiver optical module installing optical demultiplexer and method to produce optical demultiplexer
A receiver optical module to receive a wavelength multiplexed light is disclosed. The optical module installs an optical demultiplexer to demultiplex the wavelength multiplexed light. The optical demultiplexer includes a wavelength selective filters each supported by a base substrate. A feature of the base substrate is that the base substrate...

05/15/14 - 20140133863 - Network system, network apparatus, and method of controlling network
A network apparatus includes a plurality of transceivers (110) each of which has a frequency variable characteristic and communicates on an allocated channel, a channel allocation unit (154) which allocates channels of standby transceivers that are not connected to a network and are set to a standby state, among the...

04/10/14 - 20140099117 - 40, 50 and 100 gb/s optical transceivers/transponders in 300pin and cfp msa modules
Disclosed by way of exemplary embodiments, a 40/50/100 Gb/s Optical Transceivers/transponders which use opto-electronic components at data rates collectively that are lower than or equal to half the data rate, using two optical duobinary carriers. More specifically, the exemplary embodiments of the disclosed optical transceivers/transponders relate to a 43 Gb/s...

04/10/14 - 20140099118 - Systems and methods for routing and wavelength assignment for network virtualization
A method for routing and wavelength assignment for optical network resources required for a plurality of virtual network requests includes receiving the plurality of virtual network requests. The method further includes determining a number of virtual links for each virtual network request. The method includes sorting the plurality of virtual...

04/10/14 - 20140099119 - Transport functions virtualization for wavelength division multiplexing (wdm)-based optical networks
A method for virtualizing an optical network, comprising: abstracting optical resource information corresponding to resources within the optical network, constructing a plurality of candidate paths for one or more optical reachability graph (ORG) node pairs, determining whether the candidate paths are optical reachable paths, and creating an ORG link between...

04/10/14 - 20140099120 - Optical transmission system
An optical transmission system includes a lens wafer to couple light into an optical transmission medium. The lens wafer includes a set of collimating lenses on a first side of the lens wafer, the collimating lenses to collimate beams of light from a plurality of light sources. The lens wafer...

03/20/14 - 20140079400 - Fiber optic data networks that simultaneously carry network data and control signals over the same fiber optic links and related methods and apparatus
Fiber optic data networks have a first network device that has a first optical transmitter that is configured to transmit an optical signal having a first wavelength. A fiber optic communications channel provides a data connection between the first network device and a second network device. The network further includes...

03/13/14 - 20140072306 - Optical service channel systems and methods over high loss links
Optical service channel (OSC) systems and methods over high loss links are described utilizing redundant telemetry channels. A first telemetry channel provides a low bandwidth communication channel used when Raman amplification is unavailable on a high loss link for supporting a subset of operations, administration, maintenance, and provisioning (OAM&P) communication....

03/13/14 - 20140072307 - Channel estimation for optical orthogonal frequency division multiplexing systems
An apparatus comprising an optical receiver configured to receive a plurality of orthogonal frequency-division-multiplexed (OFDM) symbols comprising a first OFDM symbol and a second OFDM symbol, and a processor coupled to the optical receiver and configured to generate a first decoded signal based on the first OFDM symbol, estimate a...

03/06/14 - 20140064733 - Self-injection laser, wave division multiplexing passive optical network system and optical line terminal
Embodiments of the present disclosure provide a self-injection laser, a WDM-PON system and an optical line terminal. The self-injection laser includes a gain medium, an array waveguide grating AWG, a periodic filter and a reflection module. The AWG is configured to multiplex an optical signal received from the gain medium...

03/06/14 - 20140064734 - Wdm telecommunications link with coherent detection and optical frequency comb sources
An optical data link has a transmitter and a receiver with coherent detection at the receiver and more than one optical carrier frequency. The optical carrier frequencies are generated by a frequency comb source in both the transmitter and the receiver. The frequency comb sources generate frequency combs that have...

02/20/14 - 20140050480 - System and method for mitigating four-wave-mixing effects
In one embodiment, a system includes at least one tone generator, a first transmitter, and a second transmitter. The at least one tone generator is operable to generate a plurality of modulation tones comprising at least a first modulation tone having a first tone frequency and a second modulation tone...

02/13/14 - 20140044431 - Optical connection hitless bandwidth or spectrum resizing
A method and system are disclosed in which a signaling message conforming to a GMPLS signaling protocol and associated with an optical connection is generated and transmitted by a transmit node to a receive node to change the size of a connection bandwidth in a network. The message may include...

02/06/14 - 20140037293 - High speed optical transceiver module
Disclosed herein is a high speed optical transceiver module, which makes it possible to prevent a wavelength shift and thus to achieve low power and high efficiency by forming a hole with a predetermined depth in a stem heat sink for dissipating heat generated in an LD through a lower...

01/23/14 - 20140023371 - Optical transmission system, receiving-end device, and optical transmission method
An optical transmission system includes an optical transmitting device (8) and an optical receiving device (9). The optical transmitting device (8) includes an operating channel transmitting unit (81) that transmits a first optical signal to an operating channel, and a redundant channel transmitting unit (82) that transmits a second optical...

01/23/14 - 20140023372 - Method and apparatus for dynamic wavelength allocation in wavelength switched optical networks
A method of allocating a wavelength to a lightpath in a wavelength multiplex for use in an optical network comprising nodes connected by optical links, wherein the wavelength multiplex is adapted to support lightpaths of two different bitrates. The disclosed method allows for efficient allocation of wavelengths that prevents wasting...

01/16/14 - 20140016939 - Spectrum aware rate selection procedure for optical channels in flexible wdm networks
A spectrum-aware rate selection includes finding a set of channels based on spectrum availability information such that the total required spectrum for a requested data rate of a traffic demand is minimized....

01/16/14 - 20140016940 - Processing data in an optical network
Processing data in an optical network A method devices for processing data in an optical network are provided, wherein a centralized component is connected to several decentralized components; wherein first data is conveyed from the centralized component to at least two decentralized components, wherein the at least two decentralized components...

01/09/14 - 20140010543 - Tunable coherent optical receiver and method
The invention provides a tunable coherent optical receiver and a related method wherein the receiver uses low-frequency trace-tone modulation of optical WDM channels at transmission as channel IDs in order to detect which optical channels are present in the received optical WDM signal. The receiver than discriminates between the thereby...

12/19/13 - 20130336656 - Simplified serial data over optical fiber for remote receiver/sensor applications
Embodiments of the concepts, systems, and techniques disclosed herein are directed to an optically powered, direct-sampling, analog-to-digital converter (ADC) that provides fully formatted, serialized data for transmission over optical fiber from a remote location. Such a system and method of use thereof requires less electrical power, fewer components, and less...

12/19/13 - 20130336657 - Method for configuring transmission interfaces of devices communicating via a band-pass filter
A method configuring an optical transmission interface of at least one first device transmitting optical signals on a path to a second device on a carrier wavelength substantially equal to a nominal wavelength of an optical band-pass filter present on the path, each first device including an optical reception interface...