FREE patent keyword monitoring and additional FREE benefits. http://images1.freshpatents.com/images/triangleright (1K) REGISTER now for FREE triangleleft (1K)
FreshPatents.com Logo    FreshPatents.com icons
Monitor Keywords Patent Organizer File a Provisional Patent Browse Inventors Browse Industry Browse Agents

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.

Related Categories:

Optical Communications


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



Photonic integrated transmitter device, photonic integrated receiver device, and active optical cable transceiver system
05/28/15 - 20150147062 - A photonic integrated transmitter device (21) is provided, including a substrate, an array of modulated light sources, each light source providing a modulated signal output at a channel wavelength different from the channel wavelength from other modulated light sources of the array of modulated light sources, an optical fiber interface,...

Interferometer configured for signal processing in an interference path
05/28/15 - 20150147063 - An interferometer is provided that includes a first path and a second path. The first path is configured to propagate an electro-magnetic signal at a first wavelength. The second path is configured to convert a portion of the electro-magnetic signal from the first wavelength to a second wavelength for processing...

Method and apparatus for allocating slots for transmission of data
05/21/15 - 20150139652 - Slots (311) for transmission of data of a particular transmission type over an optical network are allocated by selecting a first available slot (313—2) at an ordinal position corresponding to a multiple of n and allocating the selected first available slot and the next n−1 consecutive slots (313—4, 313—5) from...

Prioritized optical arbitration systems and methods
05/21/15 - 20150139653 - According to an example, nodes request access to a shared resource in a prioritized optical arbitration system. Each node attempts to extract a wavelength corresponding to a priority level selected by the node from a waveguide. A node is granted access to the resource according to priority level, and is...

Variable color data transmission
05/14/15 - 20150132000 - Systems comprising at least an encoder for receiving a binary string of a data, the encoder adapted to partition the binary string into one or more binary substrings and assign a color to each one or more substrings corresponding to a color model, a controller for converting the color into...

Transmitter module outputting wavelength multiplexed light
05/14/15 - 20150132001 - A transmitter module having a plurality of semiconductor laser diodes (LDs) as optical signal sources that emit optical respective optical beams with specific wavelengths different from other is disclosed. The transmitter module includes, in addition to the LDs, a driver to drive LDs in the shunt-driving configuration. Inductors through which...

Integrated laser and method of fabrication thereof
05/14/15 - 20150132002 - There is provided an integrated laser. The integrated laser includes a semiconductor waveguide having a first section, a second section and a third section. The integrated laser further includes an active region formed on the third section of the semiconductor waveguide, the active region configured for generating light, and a...

Method for measuring wavelength channel tuning time of tunable device in optical network, and system thereof
05/07/15 - 20150125153 - A method for measuring a wavelength channel tuning time by using an optical filter that converts a change of an output wavelength of a tunable device into an optical intensity change, and a system thereof. The system for measuring a wavelength channel tuning time includes: an optical filter set configured...

Wdm link for radio base station
04/30/15 - 20150117861 - A radio base station has a baseband controller coupled to a radio head by an optical wavelength division multiplexed link to pass downlink signals on a first wavelength, and uplink signals on another wavelength. A compensating delay is applied to one of the signals to compensate for a difference in...

Method for transmitting and method for receiving a binary data stream, transmitter and receiver for carrying out the method
04/23/15 - 20150110491 - A transmitter of a binary data stream comprises: a serial/parallel converter to split the binary data stream into m different parallel bit streams, each bit stream having a rate D/m which is m times lower than the initial rate D; m first encoding modules to error-correcting encode each bit stream...

Transmission and reception of quad-subcarrier orthogonal frequency division multiplexed signals
04/23/15 - 20150110492 - A dual-polarization, 4-subcarriers orthogonal frequency division multiplexed signal carrying information bits is transmitted in an optical communication network without transmitting a corresponding pilot tone or training sequence. A receiver receives the transmitted signal and recovers information bits using a blind equalization technique and by equalizing the 4-subcarriers OFDM signal as...

Channel establishment method and device
04/16/15 - 20150104175 - A channel establishment method and device are provided. The method includes: establishing a media channel between a first node and a second node, wherein the first node is the source node of the media channel, the second node is the destination node of the media channel, and the media channel...

Operation and stabilization of mod-mux wdm transmitters based on silicon microrings
04/16/15 - 20150104176 - A transmitter comprising a plurality of modulator and multiplexer (Mod-MUX) units, each Mod-MUX unit operating at an optical wavelength different from the other Mod-MUX units. The transmitter can additional include in each Mod-MUX unit two optical taps and three photodetectors that are configured to allow the respective Mod-MUX unit to...

Full-duplex optical transceiver applicable to digital coherent system
04/16/15 - 20150104177 - An optical transceiver applicable to the coherent communication is disclosed. The optical transceiver includes a laser module, a transmitter module to output a transmitting signal by modulating a phase of an laser beam output from the laser module, and a receiver module to receive a receiving signal modulated in the...

Method and apparatus for allocating optical spectrum bandwidth resources
04/16/15 - 20150104178 - Embodiments of the present invention provide a method and an apparatus for allocating optical spectrum bandwidth resources. The method includes: first determine bandwidth of an OTUbase according to optical-layer frequency grid bandwidth and carrier spectrum efficiency; then construct an HO OTUflex according to bandwidth of customer service data and the...

Apparatus for suppressing noise in injection-locked light source and wdm-pon system provided with same
04/02/15 - 20150093114 - A WDM-PON system configured to perform an asymmetric wavelength division multiplexing and demultiplexing is proposed. A receiving end of WDM-PON system configured to receive a light transmitted from a transmission end including a first wavelength division multiplexer/demultiplexer includes a second wavelength division multiplexer/demultiplexer configured to demultiplex the light received rom...

Open shortest path first extensions in support of wavelength switched optical networks
03/26/15 - 20150086205 - A network component comprising a generalized multiprotocol label switching (GMPLS) control plane controller configured to implement a method comprising transmitting a message to at least one adjacent control plane controller, wherein the message comprises a Type-Length-Value (TLV) indicating Routing and Wavelength Assignment (RWA) information, wherein the TLV comprises a Node...

Nonlinear fourier analysis in optical systems
03/19/15 - 20150078750 - A receiver configured to receive wave packets encoded with data via a nonlinear channel is disclosed. The receiver includes an input configured to receive the wave packets from the non-linear channel. The receiver also includes a processor configured to generate a transfer matrix from the received wave packets and find...

Tunable laser with multiple in-line sections including sampled gratings
03/19/15 - 20150078751 - A tunable laser with multiple in-line sections including sampled gratings generally includes a semiconductor laser body with a plurality of in-line laser sections configured to be driven independently to generate laser light at a wavelength within a different respective wavelength range. Sampled gratings in the respective in-line sections have the...

Wavelength division multiplexing with multi-core fiber
03/12/15 - 20150071638 - Optical systems for wavelength division multiplexing and wavelength division demultiplexing with a multi-core fiber, and methods of their fabrication, are disclosed. The systems include a coupling mirror with a plurality of angled surfaces that are configured to direct light to or from different cores of a multi-core fiber. In addition,...

Method and system for floating grid transceiver
03/12/15 - 20150071639 - A multi-channel transceiver using a floating frequency grid for multi-channel, optical communication is presented. Transmitter frequencies are permitted to drift, and a receiver is tuned to compensate for drifts in the transmitter frequencies....

Clock recovery method for ultra dense wdm systems
03/05/15 - 20150063813 - An exemplary method and apparatus are provided for high efficiency wavelength division multiplexing (WDM) optical communication systems. An optical transmitter adapted to transmit an optical signal on an optical WDM transmission channel to a corresponding optical receiver is described. The optical transmitter comprises a symbol generation unit adapted to convert...

Network management system
03/05/15 - 20150063814 - Services are transmittable via a transport network by using container(s), wherein each container is adapted to transmit data with a specific bandwidth and is multiplexable, according to a dynamic multiplexing structure, to at least another container adapted to transmit data with a higher bandwidth. The network management system selects a...

Passive optical network system using time division multiplexing
02/26/15 - 20150055956 - Disclosed is a passive optical network system using a time division multiplexing scheme. According to one exemplary embodiment, the passive optical network system includes a plurality of optical network units (ONUs); an optical line terminal (OLT) to be connected to the plurality of ONUs for communication and to transmit and...

Method of determining physical layer wavelength of tunable optical network unit (onu) in time and wavelength division multiplexed passive optical network (twdm-pon)
02/26/15 - 20150055957 - A method of determining a physical layer wavelength of a tunable optical network unit (ONU) in a time wavelength division multiplexing-passive optical network (TWDM-PON) is provided. First, a receiving wavelength of a tunable receiver is tuned to a downstream wavelength of one of a plurality of operable channels in a...

Method for compensating chromatic dispersion and associated equipment
02/12/15 - 20150043917 - A method and device for compensating, within a node of an optical network, chromatic dispersion undergone by optical packets transmitted within time slots of wavelength division multiplexed channels along at least one link of the optical network, a time slot duration corresponding to the sum of a packet duration and...

Double capacity pluggable optics
02/12/15 - 20150043918 - The methods, systems, and apparatuses described in this disclosure enable the use of pluggable optics such that two outgoing connections or two incoming connections can support the use of dual transmitter optics and/or dual receiver optics. The forward and/or reverse capacity of an optical network can be doubled using two...

Apparatus and methods for generating and receiving optical signals at substantially 100gb/s and beyond
02/12/15 - 20150043919 - An optical communication technique transmits an optical signal at a higher bit rate using an optical transceiver interface couplable to a set of optical transmitters, each operating at a lower bit rate a plurality of channels, by demultiplexing the optical signals from the transmitters such that some of the resulting...

Method for manufacturing wavelength division multiplexing transmission apparatus and wavelength division multiplexing transmission apparatus
02/05/15 - 20150037037 - A method for manufacturing a wavelength division multiplexing transmission apparatus, includes arranging laser devices in a line and fixing the laser devices to a first substrate, fixing to a second substrate reflectors arranged to multiplex laser beams emitted from the laser devices and to generate wavelength multiplexed light, and arranging...

Optical module
02/05/15 - 20150037038 - An optical transceiver includes: a first WDM filter which reflects a first optical signal from a first light source and passes a second optical signal from a second light source; a first total reflection mirror which reflects the first optical signal to make it enter the first WDM filter; a...

Hamming coded modulation
01/29/15 - 20150030333 - An optical system may include a digital signal processor (DSP) to receive first samples of a digital signal. The first samples may be Hamming encoded. The DSP may correlate the first samples to multiple groups of second samples to determine multiple correlation values. Each of the multiple groups of second...

Method, system, and transceiver device for bi-directionally transmitting digital optical signals over an optical transmission link
01/29/15 - 20150030334 - A method for bi-directionally transmitting digital optical signals over an optical transmission link in which a first optical transmit signal is created according to a first binary digital signal in such a way that the bit information of the first binary digital signal is included in first sections of the...

Network designing apparatus, network designing method, and network designing program
01/22/15 - 20150023666 - A network designing apparatus which includes a first processing unit configured to select one or more paths formed among nodes in a network according to demands of bandwidths, determine a plurality of working communication routes and a plurality of protecting communication routes that connect the nodes to each other, respectively...

System and method for coherent detection with digital signal procession
01/22/15 - 20150023667 - Aspects of the present invention include apparatus and methods for transmitting and receiving signals in communication systems. A multicarrier generator generates a multicarrier signal. An optical demultiplexer separates the multicarrier signal into separate multicarrier signals. At least one QPSK modulator modulates signals from the separate multicarrier signals. An optical multiplexer...

Wavelength multiplexing apparatus and method
01/15/15 - 20150016822 - A wavelength multiplexing apparatus includes: a dividing unit to divide a multiplexed optical signal into a plurality of groups each including a plurality of channels; a designating unit to designate, for each group, an arbitrary channel as a designated channel and to designate an adjacent channel in a predetermined frequency...

Optical slab
12/11/14 - 20140363165 - An apparatus can comprise an optical slab comprising a rigid substrate of substantially transmissive material. The apparatus can also comprise a WDM multiplexer to receive and combine a plurality of optical signals at different wavelengths to form a combined optical signal in the optical slab having an aggregate power. The...

Wavelength division multiplexing passive optical network system
12/04/14 - 20140355990 - This disclosure describes a wavelength division multiplexing passive optical network system (100) comprising an optical line terminal (180) for controlling transmission of data that are carried by optical signals across the optical network system along an upstream or downstream path; a signal modulating loop circuit including a circulator (110) connected...

A method of processing a digital signal for transmission, a method of processing an optical data unit upon reception, and a network element for a telecommunications network
12/04/14 - 20140355991 - A method of processing a digital signal for transmission is provided comprising digital data frames, by compressing the digital data frames; and generating an optical data unit for transmission comprising multiple of the compressed digital data frames. The optical data unit is configured for transport by an Optical Transport Network,...

Wavelength and bandwidth allocation method
12/04/14 - 20140355992 - A wavelength and bandwidth allocation method which includes in order: a wavelength allocation step of allocating each wavelength of an uplink signal to each ONU so that the sum of target bandwidths each allocated as a target to each of the ONUs to which each wavelength of the uplink signal...

Compact multi-channel optical transceiver module
11/20/14 - 20140341580 - A compact multi-channel optical may include a multi-channel transmitter optical subassembly (TOSA), a multi-channel receiver optical subassembly (ROSA) and a circuit board configured and arranged to fit within a relatively small space. The multi-channel ROSA is spaced from the circuit board to allow circuit components to be mounted between the...

Isolating differential transmission lines
11/20/14 - 20140341581 - An apparatus includes a first differential transmission line and a second differential transmission line. The second differential transmission line is parallel to the first differential transmission line through an overlap region. The first differential transmission line includes a first line and a second line. The first differential transmission line includes...

Systems and methods for single wavelength with dual channels for control signal and internet data transmission
11/20/14 - 20140341582 - Systems and methods for single wavelength with dual channels for control signal and Internet data transmission are disclosed. According to an aspect, a network unit may include a communications module configured to receive a single wavelength signal having first and second channels. The first channel may carry Internet data. The...

Wavelength multiplexed transmitter optical module
10/30/14 - 20140321856 - 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...

Reconfiguration of an optical connection infrastructure
10/23/14 - 20140314417 - 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....

Equalizing a signal modulated using a 5qam modulation format
10/16/14 - 20140308039 - 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...

Optical path computation based on a reachability matrix
10/16/14 - 20140308040 - 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...

Bidirectional optical data communications module
09/18/14 - 20140270778 - 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...

Wavelength selection and configuration method for multi-wavelength optical communication system
09/18/14 - 20140270779 - 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...

Apparatus and method for forward error correction over a communication channel
09/18/14 - 20140270780 - 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...

Increasing the capacity of a wdm-pon with wavelength reuse
09/11/14 - 20140255033 - 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...

Wavelength real time display on the equipment for wdm optical networking systems with wavelength tunable capability
09/04/14 - 20140248056 - 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...

Method and system for receiving an optical-duo-binary signal
08/28/14 - 20140241728 - 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...

Allocation of spectral capacity in a wavelength-division multiplexing optical network
08/21/14 - 20140233956 - 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...

Virtual networking embedding procedure in an optical wavelength division multiplexing (wdm) network
08/14/14 - 20140226985 - 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....

Signal detection circuit and optical transmission equipment
08/07/14 - 20140219662 - 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...

Method for split spectrum signalling in an optical network
07/24/14 - 20140205296 - 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...

Method, system, and apparatus for transmitting data information by using optical signals
07/24/14 - 20140205297 - 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...

Orthogonal frequency division multiple access-passive optical network comprising optical network unit and optical line terminal
07/17/14 - 20140199074 - 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...

Apparatus and method for controlling multicarrier light source generator
07/17/14 - 20140199075 - 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...

Methods and apparatus to multiplex light signals
07/10/14 - 20140193153 - 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...

Subchannel security at the optical layer
07/10/14 - 20140193154 - 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...

Physical-layer channel bonding
07/03/14 - 20140186041 - 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...

Optical receiver having wavelength recognition function, and device and method for recognizing wavelengths using the same
07/03/14 - 20140186042 - 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...

Frequency domain multiplex optical transmission
06/19/14 - 20140169793 - 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....

Thermally isolated multi-channel transmitter optical subassembly and optical transceiver module including same
06/12/14 - 20140161457 - 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...

Method and apparatus for increasing a transmission performance of a hybrid wavelength division multiplexing system
06/12/14 - 20140161458 - 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...

Thermally shielded multi-channel transmitter optical subassembly and optical transceiver module including same
06/12/14 - 20140161459 - 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...

Method and apparatus for transporting a client signal over an optical network
06/12/14 - 20140161460 - 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...

Time and wavelength division multiplexing - passive optical network (twdm-pon) system and communication link method thereof
06/12/14 - 20140161461 - 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...

Transmission control device, transmission system, and transmission method
06/05/14 - 20140153925 - 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...

Grooming multicast traffic in flexible optical wavelength division multiplexing wdm networks
05/29/14 - 20140147120 - 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...

Advertise on FreshPatents.com - Rates & Info

###

FreshPatents.com Support - Terms & Conditions