| Entries |
| Document | Title | Date |
|---|
| 20080212965 | METHOD AND APPARATUS FOR DYNAMICALLY ALLOCATING UPSTREAM BANDWIDTH IN PASSIVE OPTICAL NETWORKS - One embodiment of the present invention provides a system that facilitates dynamic allocation of upstream bandwidth in a passive optical network which includes a central node and at least one remote node. Each remote node is coupled to at least one logical entity, which corresponds to a device or a user, that transmits upstream data to the central node and receives downstream data from the central node. The central node is coupled to an external network outside of the passive optical network through a shared out-going uplink. | 09-04-2008 |
| 20080260384 | Optical element integrated module - In an optical element integrated module, first through n-th optical data signals are externally input to first ports of first through n-th optical circulators and are input to first through n-th optical/optical converters via second ports. The first through n-th optical/optical converters modulate first through n-th optical short pulse trains in accordance with the first through n-th optical data signals. First through n-th modulated optical data signals are input to the second ports of the first through n-th optical circulators and are input to an optical time division multiplexing section. The optical time division multiplexing section generates optical time division multiplexed signals by time division multiplexing the first through n-th modulated optical data signals. | 10-23-2008 |
| 20080317467 | Amplified Wavelength Broadband Video Distribution Architectures - Provided herein are embodiments of a device, method of use and system for a low-cost analog multi-wavelength video distribution transamplifier for CATV and FTTH networks having a broadband overlay. The transamplifier embodiments described herein allow the use of multiple wavelengths to segment logical service groups in a CATV distribution system and a FTTH system having a broadband overlay. | 12-25-2008 |
| 20080317468 | Amplified Wavelength Broadband Video Distribution Architectures Using An External Waveguide - Provided herein are embodiments of a device, method of use and system for a low-cost analog multi-wavelength video distribution transamplifier for CATV and FTTH networks having a broadband overlay. The transamplifier embodiments described herein allow the use of multiple wavelengths to segment logical service groups in a CATV distribution system and a FTTH system having a broadband overlay. Improved optical signal power performance can be achieved by using direct modulating transmitters and modulating the optical signal for with an external waveguide, thereby decreasing SBS and reducing non-linearities. | 12-25-2008 |
| 20090016722 | ONT DISCOVERY IN A DWDM HYBRID PON LT CONFIGURATION - A method, a computer readable medium, and a system for discovering an Optical Network Terminal (ONT) in a Dense Wave Division Multiplex (DWDM) hybrid Passive Optical Network (PON) Line Terminal (LT), comprises implementing, by an Optical Line Termination (OLT), a ranging procedure on at least one downstream link, wherein the OLT is communicably coupled to the ONT, discovering at least one new ONT, by the OLT, on the at least one downstream link based on the ranging procedure, discovering an unranged ONT, by the OLT, during the ranging procedure, and determining, by the OLT, that the unranged ONT resides on the at least one downstream link. | 01-15-2009 |
| 20090034974 | Banded Semiconductor Optical Amplifiers and Waveblockers - Embodiments of the present invention provide an array of semiconductor optical amplifiers, within a photonic integrated circuit (hereinafter, “PIC”), that apply a gain to one or more optical bands within a WDM signal. According to various embodiments of the invention this array of SOAs can function as both an amplifier and a ROADM by adjusting the gain characteristics of one or more of the SOAs within the array. A band within the WDM signal may be blocked by adjusting the SOA, corresponding to the particular band, to attenuate the band below a threshold. | 02-05-2009 |
| 20090142060 | METHOD AND APPARATUS FOR TRANSFERRING WDM SIGNALS BETWEEN DIFFERENT WAVELENGTH DIVISION MULTIPLEXED OPTICAL COMMUNICATIONS SYSTEMS IN AN OPTICALLY TRANSPARENT MANNER - In a WDM optical communication system that includes a plurality of nodes interconnected by communication links, a node is provided which includes an optical coupling arrangement having at least one input port for receiving a WDM signal and a plurality of output ports for selectively receiving one or more wavelength components of the WDM optical signal. The optical coupling arrangement is adaptable to reconfigure its operational state to (i) selectively direct any one of the wavelength components received on the input port to any of the output ports independently of any other of the wavelength components and (ii) selectively direct any combination of two or more of the wavelength components from the input port to at least two of the output ports that serve as WDM output ports. At least one optical WDM interface is optically coupled to a first of the WDM output ports. The optical WDM interface is adapted to receive, at different times, a transponder and a transmission link through which a WDM signal can be communicated. At least one transponder is coupled to a second of the WDM output ports. | 06-04-2009 |
| 20090148165 | OPTICAL FILTERING APPARATUS AND OPTICAL COMMUNICATION SYSTEM - Provided is an optical filtering apparatus which is applied to a Time Division Multiplexing Passive Optical Network (TDM-PON) based on a wavelength division multiplexing (WDM) method. The optical filtering apparatus includes: an optical signal distributing unit dividing an optical signal received from an optical line terminal into at least one optical signal with uniform output intensity, and distributing the at least one optical signal into at least one optical network unit; and a multiplexing unit combining a plurality of optical signals having different wavelengths received from the at least one optical network unit using a wavelength division multiplexing (WDM) method, and outputting the combined optical signal to the optical line terminal. Therefore, by using the optical filtering apparatus, it is possible to connect a large number of subscribers to an Optical Line Terminal (OLT) on a network such as Fiber To The Home (FTTH), thereby increasing efficiency in costs. | 06-11-2009 |
| 20090180777 | SYSTEMS, APPARATUS, METHODS AND COMPUTER PROGRAM PRODUCTS FOR DOWNLOADING AND MAINTAINING IP STREAM WHITELISTS ON OPTICAL NETWORK TERMINALS - Systems, apparatus, methods and computer program products are provided for downloading a whitelist onto a passive optical network including a passive optical network and a management interface communicatively coupled to the passive optical network and configured to provision the whitelist. An optical line terminal also on the passive optical network includes a passive optical network card operable to broadcast the whitelist to optical network terminals which are configured to receive and enforce the whitelist. | 07-16-2009 |
| 20090185806 | Broadcasting arrayed waveguide - The invention is a data transmission device that includes: an input Free Propagation Region (FPR) receiving a multi-wavelength signal and a single-wavelength signal, and two sets of arrayed waveguides coupled to the input FPR to carry the multi-wavelength signal and the single-wavelength signal, respectively. The arrayed waveguides demultiplex the multi-wavelength signal and create copies of the single-wavelength signal. The output plane of an output FPR receives the demultiplexed wavelengths and the copies of the single-wavelength signal such that one of the demultiplexed wavelengths and one of the copies of the single-wavelength signal focus onto the same position on the output plane. The device allows data (e.g., video stream) to be broadcast to all subscribers in a Wavelength-Division-Multiplexed Passive Optical Network (WDM-PON) architecture. A multicasting apparatus can be implemented by using a plurality of these devices and using different wavelengths for the single-wavelength signal for the different devices. | 07-23-2009 |
| 20090252495 | METHOD AND APPARATUS FOR DEMULTIPLEXING OPTICAL SIGNALS IN A PASSIVE OPTICAL NETWORK - Methods and structures are disclosed demultiplexing optical signals transmitted over an optical fiber into a silicon substrate and to multiple detectors. The silicon substrate has two spaced-apart surfaces and a diffractive element disposed adjacent to one of the surfaces. Each of the optical signals corresponds to one of multiple wavelengths. The optical signals are directed into the silicon substrate along a path through the first surface to be incident on the diffractive element. The path is oriented generally normal with the first surface and/or with the diffractive element, which angularly separates the optical signals such that each of the wavelengths traverses through the substrate in a wavelength dependent direction to the first surface. Each optical signal is steered from the first surface towards the second surface to be incident on different optical elements that direct them generally normal to the first surface to be incident on one of the detectors. | 10-08-2009 |
| 20090274462 | CENTRALIZED LIGHTWAVE WDM-PON EMPLOYING INTENSITY MODULATED DOWSTREAM AND UPSTREAM - An optical system and method includes a source-free optical network unit coupled to an optical fiber for receiving a centralized lightwave carrier signal with downstream data over the optical fiber. The optical network unit includes a coupler configured to split the original carrier signal into a first path and a second path. The first path includes an optical filter configured to reduce fading effects of the carrier signal. The second path includes a modulator configured to remodulate the centralized lightwave carrier signal with upstream data to produce an upstream data signal for upstream transmission. | 11-05-2009 |
| 20090317083 | OPTICAL REMOTE NODE DEVICE AND SUPPORT EQUIPMENT FOR CONSTRUCTING AND EXTENDING FIBER-OPTIC ACCESS NETWORKS - Optical remote node (NR) device which is situated at a remote point in a fibre-optic metropolitan or access network, carries out the functions of connecting, and transmitting information between, various sections of the network in a passive manner without a power supply using various optical components which extract the necessary optical signals and optical pumping power from the network to which the remote node is connected, and introduces the optical signals from the sections which it connects into said network, and support equipment which is situated at a point in the network with a power supply, uses the network to provide the pumping power required by the remote nodes and has the electronics needed to carry out functions of monitoring the operation of the remote nodes and regulating their activity. | 12-24-2009 |
| 20100046945 | Multiple Star Wavelength Division Multiplexing Passive Optical Networks Using a Wavelength Assignment Method - The present invention discloses a multiple star wavelength division multiplexing passive optical network system using a wavelength assignment method. In a multiple star wavelength division multiplexing passive optical network system using a wavelength assignment method according to the present invention, only one WDM-PON system can provide services for a plurality of subscribers who is distributed in a wide range of area through multiple starring, by setting one or more band for transmitting up-stream signals as an up-stream basic band and one or more band for transmitting down-stream signals as a down stream basic band, respectively, and by dividing each of the up-stream basic band and the down stream basic band into a plurality of wavelength sub-bands and assigning the divided sub-bands to different areas using a wavelength division multiplexer/de-multiplexer which splits a band into two or more sub-bands. | 02-25-2010 |
| 20100054740 | METHOD AND NETWORK ARCHITECTURE FOR UPGRADING LEGACY PASSIVE OPTICAL NETWORK TO WAVELENGTH DIVISION MULTIPLEXING PASSIVE OPTICAL NETWORK BASED NEXT-GENERATION PASSIVE OPTICAL NETWORK - The present invention discloses a network architecture for upgrading a legacy time division multiplexing-passive optical network (TDM-PON) to a wavelength division multiplexing-passive optical network (WDM-PON) based next-generation passive optical network (next-generation PON), wherein the legacy TDM-PON comprises: a central office (CO) having a first optical line termination (OLT); a remote node (RN) having a splitter; a single mode fiber (SMF) connecting the first OLT and the splitter; and a first group of one or more optical network terminations (ONTs) being connected to the splitter by a first group of one or more distribution fibers, and wherein the network architecture further comprises: in case that the next-generation PON is a WDM-PON, a first apparatus for combining and splitting wavelength bands being positioned between the SMF and the first OLT, in order to add a second OLT to be used for the WDM-PON within the CO or within another CO which is located in a position different from the CO, while sharing the SMF; a second apparatus for combining and splitting wavelength bands being positioned at a front terminal of the splitter; and an arrayed waveguide grating (AWG) being connected to the second apparatus for combining and splitting wavelength bands within the RN, and being connected to a second group of one or more ONTs by a second group of one or more distribution fibers within the RN or within another RN which is located in a position different from the RN. | 03-04-2010 |
| 20100067911 | INJECTION LIGHT GENERATOR FOR USE IN WAVELENGTH DIVISION MULTIPLEXED-PASSIVE OPTICAL NETWORK - The invention is related to an injection light generator for use in a wavelength division multiplexed-passive optical network, which generates A-band injection light having a spectrum range separated into N wavelength ranges (N is a natural number equal to or greater than 2) to be used for a transmission of a downstream optical signal and B-band injection light having a spectrum range separated into N wavelength ranges to be used for a transmission of an upstream optical signal. | 03-18-2010 |
| 20100111533 | WDM PON SYSTEM - A Wavelength Division Multiplexed Passive Optical Network (WDM-PON) includes: a respective Optical Network Terminal (ONT) at each one of a plurality of customer sites, each ONT comprising an ONT Fabry Perot (F-P) laser for generating a respective broadband multi-mode uplink optical signal; and an Array Waveguide Grating (AWG) for receiving each broadband multi-mode uplink optical signal through a respective branch port, and for multiplexing a portion of each received broadband multi-mode uplink optical signal into a Wavelength Division Multiplexed (WDM) signal. Each ONT F-P laser is non-injection locked. A gain of each ONT F-P laser is sufficiently inhomogeneous that the modes of the respective broadband multi-mode uplink optical signal are independent. A filter function of the AWG includes a pass band that encompasses at least one mode of a broadband multi-mode uplink optical signal. | 05-06-2010 |
| 20100135661 | ETHERNET-BASED NEXT GENERATION OPTICAL TRANSPORT NETWORK APPARATUS AND TRAFFIC GROOMING METHOD THEREOF - An Ethernet-based next generation optical transport network apparatus and a traffic grooming method in the apparatus are disclosed to provide a traffic grooming function to simultaneously transmit Ethernet data and a TDM signal through the same wavelength and provide a differentiated protection switching function by the flows to effectively support an Ethernet service in an optical transport network. | 06-03-2010 |
| 20100142953 | Wavelength Division Multiplexing Transmission system and Remote Apparatus and Station Apparatus Used Therein - There is provided a wavelength division multiplexing transmission system and apparatuses used therein, in which a remote apparatus to be newly added to a station apparatus autonomously sets a wavelength to be used in the remote apparatus, thereby avoiding the need for presetting a wavelength to be used in the remote apparatus. The remote apparatus includes wavelength determining means that determines an available wavelength on the basis of an optical signal received from the station apparatus. The wavelength determining means may determine the wavelength of an unreceived optical signal as the available wavelength or may determine the wavelength of a received optical signal as the available wavelength, and may set that wavelength as a transmission and reception wavelength to be used in the remote apparatus. | 06-10-2010 |
| 20100150557 | FTTH RF over Glass (RFoG) Architecture and CPE - Methods and apparatus are described for fiber-to-the-home (FTTH) RF over Glass (RFoG) Architecture and customer-premise-equipment (CPE). A method includes up-converting a baseband upstream data signal to a frequency band above a frequency band of a baseband downstream data signal; combining the up-converted upstream data signal with an upstream cable return; transmitting the up-converted upstream data signal and the upstream cable return using a single upstream laser; separating the frequency up-converted data signal from the upstream cable return using an RF diplexer; and down-converting the frequency up-converted upstream data signal back to baseband. An apparatus comprises: a frequency up-converter that up-converts a baseband upstream data signal to a frequency band above a frequency band of a baseband downstream data signal; a frequency combiner coupled to the frequency up-converter that combines the up-converted upstream data signal with an upstream cable return; a single upstream laser coupled to the frequency combiner that transmits the up-converted upstream data signal and the upstream cable return; an RF diplexer coupled to the single upstream laser that separats the frequency up-converted data signal from the upstream cable return; and a frequency down-converter that down-converts the frequency up-converted upstream data signal back to baseband. | 06-17-2010 |
| 20100158523 | METHODS OF TRANSMITTING AND RECEIVING MULTICAST OR BROADCAST FRAME IN OLT AND ONU FOR WDM-PON, WDM-PON SYSTEM, AND OLT FOR WDM-PON - Provided are methods of transmitting and receiving a multicast or broadcast frame in an optical line terminal (OLT) and an optical network unit (ONU) for a wavelength division multiplexing (WDM)-passive optical network (PON), a WDM-PON system, and an OLT for a WDM-PON. The method of transmitting a multicast or broadcast frame in an OLT for a WDM-PON includes converting and splitting a multicast or broadcast frame input using a single wavelength into a plurality of wavelengths, combining the split wavelengths, and outputting the multicast or broadcast frame. In this way, a multicast or broadcast frame can be transmitted and received, thereby providing a single copy broadcast (SCB) function in a WDM-PON. | 06-24-2010 |
| 20100232794 | AGGREGATION NODE DEVICE OF PASSIVE OPTICAL NETWORK AND PASSIVE OPTICAL NETWORK SYSTEM - An aggregation node device of a passive optical network (PON) is provided which includes an aggregation optical line terminal (OLT) and an aggregation optical network unit (ONU). The aggregation OLT is connected to a user-side ONU. The aggregation OLT aggregates service data transmitted by a user-side ONU and transmits the aggregated service data to the aggregation ONU. The aggregation ONU is adapted to transmit the received aggregated service data to a network-side OLT. A PON system is further provided. The device and system can not only support the conventional time division multiplexing (TDM) services but also support the services based on variable-length packets and the multicast service. Moreover, it is not necessary to build an equipment room and supply power for an intermediate optical distribution network (ODN) which greatly reduces the network construction and operation costs. | 09-16-2010 |
| 20100239257 | LOGICAL PARTITIONING OF A PASSIVE OPTICAL NETWORK - In order to increase the capacity of a deployed passive optical network (PON) without replacing optical network terminators (ONTs), a PON is provided that is partitioned into multiple channels. The upstream and downstream channels in the PON are partitioned into M channels, with the number of channels on the upstream preferably equaling the number of channels on the downstream. In the downstream, the partitioning is accomplished by use of wavelength division multiplexing filters arranged in a way as to place groups of ONTs on M different wavelength bands, where all of the wavelength bands are within the downstream wavelength range of the existing PON. On the upstream, partitioning is accomplished using “injection locking” to narrow the possible wavelength range of each ONT transmitter to a portion of that possible in the existing PON. | 09-23-2010 |
| 20100266283 | WDM PON WITH DISTRIBUTION VIA CYCLIC ARRAY WAVEGUIDE GRATING - In a Wavelength Division Multiplexed Passive Optical Network (WDM-PON) including, a system for distributing uplink, downlink and RF/Video broadcast signalling. An Array Waveguide Grating (AWG) couples respective wavelength channels between a trunk fibre of the WDM-PON and a plurality of branch fibers of the WDM-PON. The AWG has a predetermined free spectral range and implements a channel plan comprising at least three spectral segments, each segment having a width equal to the free spectral range of the AWG. An Optical Line Terminal of the WDM-PON receives wavelength division multiplexed uplink signals within a first one of the spectral segments, and transmits wavelength division multiplexed downlink signals within a second one of the spectral segments. Respective channel plans within the first and second spectral segments are identical. An RF/Video broadcast transmitter generates an RF/Video broadcast signal within a third one of the spectral segments. | 10-21-2010 |
| 20110058813 | Ethernet Passive Optical Network Over Coaxial (EPOC) - Embodiments of the present invention exploit the existing capabilities of the Ethernet Passive Optical Network (EPON) MAC layer, designed for fiber optics communications, to provide a low cost MAC layer with upper layer connectivity over a hybrid fiber coaxial (HFC) network. In particular, embodiments allow for the EPON MAC to be used end-to-end (i.e., from an optical line terminal (OLT) to a coaxial network unit (CNU)) in a HFC network, thereby fully leveraging the packet processing capabilities, QoS functions, and management features of the EPON MAC. Furthermore, embodiments enable unified provisioning and management for both fiber and coaxial network units in a HFC network. | 03-10-2011 |
| 20110091213 | PASSIVE OPTICAL NETWORK SYSTEM AND WAVELENGTH ASSIGNMENT METHOD - In a PON system with WDM, at the time of initial setting, each ONU negotiates with an OLT, and automatically acquires a wavelength which can be used by the ONU. One wavelength for negotiation of assigned wavelength is fixed as a default, and a newly connected ONU first uses the wavelength. The OLT | 04-21-2011 |
| 20110135306 | APPARATUS AND METHOD FOR RELAYING IN GIGABIT PASSIVE OPTICAL NETWORK - A relaying method of an optical signal of a hybrid relaying apparatus in a gigabit passive optical element includes: selecting and receiving any one of a first serial electrical signal corresponding to a downlink wavelength division multiplexing-passive optical line terminal (WDM-PON OLT) optical signal and a second serial electrical signal corresponding to a downlink gigabit passive optical network optical line terminal (GPON OLT) optical signal; modulating the downlink serial electrical signal to a downlink GPON transmission convergence (GTC) frame; extracting control information for uplink transmission from the downlink GTC frame; converting the downlink GTC frame into the downlink serial electrical signal; and converting the converted serial electrical signal into an optical signal and transmitting the converted optical signal in a GPON OLT optical transceiver. | 06-09-2011 |
| 20110150480 | Data center with free-space optical communications - A data center for executing a data processing application includes processing units, sub-units or servers. Each of the processing units, sub-units or servers can execute a part or all of the data processing application. The processing units, sub-units or servers are electrical disjoint with respect to data communications, but can communicate with each other over free space optical links. | 06-23-2011 |
| 20120020666 | Wavelength Assignment for Multiple Operator Support - An apparatus comprising a plurality of optical line terminals (OLTs) corresponding to different providers that share an optical distribution network (ODN), a plurality of optical network units (ONUs) coupled to the OLTs via the same ODN and configured to communicate with the different OLTs using different corresponding pairs of upstream and downstream channels, wherein the upstream and downstream channels are interleaved across a plurality of wavelength bands and comprise a sequence of alternating and contiguous upstream and downstream channels, are aligned with a plurality of wavelength division multiplexing (WDM) channels, and satisfy a plurality of design requirements for the OLTs and ONUs. | 01-26-2012 |
| 20120076496 | Optical communication system, optical network management apparatus and optical network management method - An optical communication system includes a plurality of wavelength selective switches arranged on an optical network; and an optical network management apparatus configured to manage and control the optical network. In response to a path establishing request, the optical network management apparatus determines power consumption of each path that satisfies the path establishing request in the optical network based upon a wavelength being used at a connection port of each of the wavelength selective switches, selects a route based upon the determined power consumption of each of the path, and sets the selected route in the optical network. | 03-29-2012 |
| 20120106965 | OPTICAL SOURCE FOR WAVELENGTH DIVISION MULTIPLEXED OPTICAL NETWORK CAPABLE OF HIGH-SPEED TRANSMISSION OF AN OPTICAL SIGNAL BY USING UN-POLARIZED LIGHT SOURCE AND A WAVELENGTH DIVISION MULTIPLEXED-PASSIVE OPTICAL NETWORK HAVING THE SAME - An optical source for wavelength division multiplexed optical network according to the present invention comprises a broadband light source (BLS); an arrayed waveguide grating (AWG) for spectrum-dividing incoherent light outputted from the BLS; a circulator being connected between the BLS and the AWG; and a plurality of un-polarized light sources (UPLS) being respectively connected to the AWG, wherein the incoherent light which is spectrum-divided by the AWG is injected into the plurality of UPLS and thus the plurality of UPLS is wavelength-locked thereto. In case of using an optical source for wavelength division multiplexed optical network and a wavelength division multiplexed-passive optical network having the same according to the present invention. It is especially possible to lower dramatically the power of incoherent light being injected into a wavelength-locked Fabry-Perot laser diode, while to enable a high transmission speed of 1.25 Gb/s or more, and possible to further lower noise intensity of a light source at given power of the incoherent light. | 05-03-2012 |
| 20120155878 | TRANSMISSION APPARATUS AND TRANSMISSION METHOD FOR SUBSCRIBER NETWORK IN CABLE NETWORK - Provided are a transmission apparatus and a transmission method for a subscriber network in a cable network. A passive optical network (GPON) receiver receives data packets through a fiber line using a plurality of optical wavelengths from a head end. A micro cable modem termination system (CMTS) converts the data packets into a data over cable service interface specification (DOCSIS)-based DOCSIS frame and transmits the DOCSIS frame to at least one subscriber device through a coaxial line. | 06-21-2012 |
| 20120281984 | METHOD AND APPARATUS FOR ENABLING MULTIPLE PASSIVE OPTICAL NETWORKS TO SHARE ONE OR MORE SOURCES - A method and apparatus for implementing a hybrid SOA-Raman amplifier in a central office in order to enable multiple passive optical networks to share one or more enhancement service sources, e.g., to share a source for a broadcast service are disclosed. | 11-08-2012 |
| 20120294615 | Long-distance box and method for processing uplink and downlink light thereof - The disclosure provides a long-distance box and a method for processing uplink light and downlink light of the long-distance box, uplink light and downlink light from different Passive Optical Network (PON) systems are split, the uplink light from the different PON systems is transmitted through a first optical path, and the downlink light from the different PON systems is transmitted through a second optical path; wherein the uplink light from the different PON systems is amplified by an Optical Amplifier (OA) and then output to Optical Line Terminals (OLT) of respective systems; the downlink light from different PON systems with the different wavelengths is transmitted through different optical sub-paths of the second optical path according to the wavelengths of the downlink light, and the downlink light is amplified by different Optical-Electrical-Optical (OEO) conversion devices on the different optical sub-paths and then output to Optical Network Units (ONUs) of the respective systems. The disclosure applies a hybrid long-distance box combining OEO and OA technologies to process a point-to-multipoint fiber access of a coexisting PON system, integrates advantages of both OA and OEO, and has high reliability, such that both uplink light and downlink light from different PON systems are amplified effectively. | 11-22-2012 |
| 20130084070 | OPTICAL TRANSCEIVER INCLUDING OPTICAL FIBER COUPLING ASSEMBLY TO INCREASE USABLE CHANNEL WAVELENGTHS - An optical transceiver may include an optical fiber coupling assembly for coupling optical fibers to transmitter and receiver sub-assemblies to increase the number of usable channel wavelengths by reducing an incident angle on a WDM filter without causing unwanted back reflection to a laser. In one example, the optical fiber coupling assembly may be used to increase the number of usable channel wavelengths between the L-band and the C-band. The optical transceiver may be used, for example, in an optical line terminal (OLT) and/or optical networking unit (ONU) in a wavelength division multiplexed (WDM) passive optical network (PON) capable of transmitting and receiving optical signals on multiple channel wavelengths. | 04-04-2013 |
| 20130094861 | Wavelength Indication in Multiple-Wavelength Passive Optical Networks - An apparatus of a passive optical network (PON) comprising an optical line terminal (OLT) component configured to couple to an optical network unit (ONU) and send downstream wavelength identification to the ONU to indicate a wavelength that corresponds to the ONU, wherein the downstream wavelength identification is transmitted using a Media Access Control (MAC) layer frame for an embedded channel, a control message channel, or a data channel. Also included is an apparatus of a PON comprising an ONU component configured to couple to an OLT and send upstream wavelength feedback to the OLT to indicate a wavelength that corresponds to the ONU, wherein the upstream wavelength feedback is transmitted using a MAC layer frame for an embedded channel, a control message channel, or a data channel. | 04-18-2013 |
| 20130094862 | Wavelength Management in Multiple-Wavelength Passive Optical Networks - A system for supporting wavelength management in a passive optical network (PON), comprising an optical line terminal (OLT) configured to send an wavelength assignment for optical network unit (ONU) communications based on a wavelength tunability capability, and an ONU coupled to the OLT and configured to send the wavelength tunability capability to the OLT, wherein the wavelength assignment and the wavelength tunability capability are sent in media access control (MAC) messages. Also disclosed is an apparatus of an OLT for supporting wavelength management, comprising one or more component configured to couple to an ONU and exchange a wavelength assignment for transmission with the ONU based on a wavelength tunability of the ONU, wherein the wavelength indication and the wavelength tunability are exchanged via MAC layer frames. | 04-18-2013 |
| 20130163990 | Provisioning and Commissioning a Communications Network with a Virtual Network Operations Center and Interface - An interface coupled to a virtual network operations center and coupled to a data communications network having at least one optical channel. Equipment on the data communications network is identified by the interface wherein the interface coordinates and correlates communications between the I/O interfaces of a server coupled to the network so that data rates and data protocols are managed properly. The interface receives commands from and transmits commands to the data communications network and translates the commands to be further transmitted and used in the virtual network operations center coupled to the server. The data communications network is represented in a three dimensions virtual world in the virtual network operations center so that events on the network can be represented in real-time in the virtual network operations center. | 06-27-2013 |
| 20130188954 | RFoG CPE Devices with Wavelength Collision Avoidance Using Laser Transmitter Local and/or Remote Tunability - Methods and apparatus are described for RFoG CPE devices with wavelength collision avoidance using local and/or remote tunability. A method includes tuning each of a plurality of optical transmitters to a plurality of non-overlapping frequency bands to avoid wavelength collisions in an upstream portion of a multipoint-to-point RFoG network where multiple optical transmitters from different RFoG CPE units transmit at the same time to a single shared optical receiver. | 07-25-2013 |
| 20130272707 | OPTICAL NETWORK - An optical network includes a first passive optical network optical line terminal that transmits a first optical signal at a first wavelength, coupled to a first port of a first optical filter arrangement, and a second passive optical network optical line terminal that transmits a second optical signal at a second, different wavelength, coupled to a second port of the first optical filter arrangement. An optical coupler, connected between the second terminal and the second port of the first optical filter, couples optical signals at a predetermined set of wavelengths from a third optical line terminal into the second port. A passive optical distribution node connects to optical network terminations and distributes optical signals between the optical line terminals and the optical network terminations. A method of provisioning an optical network is also described. | 10-17-2013 |
| 20140016937 | OPTICAL COMMUNICATION SYSTEM AND METHOD FOR DATA PROCESSING IN AN OPTICAL NETWORK - An optical communication system and a method for data processing in an optical network are provided, the optical network including a first optical transmission group for generating a first plurality of wavelengths in a downstream direction, a second optical transmission group for generating a second plurality of wavelengths in the downstream direction and a plurality of optical network units for receiving the first and second plurality of wavelengths, wherein the plurality of optical network units are configured to change between a first mode and a second mode of data transmission, the method comprising the steps of allocating the wavelengths associated with the optical network units in the first mode of data transmission in the first optical transmission group, allocating the wavelengths associated with the optical network units in the second mode of data transmission in the second optical transmission group and deactivating the second optical transmission group. | 01-16-2014 |
| 20140023370 | PROCESSING DATA IN AN OPTICAL NETWORK ELEMENT - A method for processing data in an optical network element are provided, wherein the optical network element comprises a local oscillator operating at a first frequency; wherein an incoming data stream is received at a second frequency; wherein the incoming data steam is processed using the first frequency; wherein a first pattern is searched in the incoming data stream; wherein a second pattern is searched in the incoming data stream; and wherein the first pattern corresponds to the first frequency being in the spectrum on one side of the second frequency and the second pattern corresponds to the first frequency being in the spectrum on the other side of the second frequency. Also, a corresponding optical network element and a communication system comprising at least one such optical network element are suggested. | 01-23-2014 |
| 20140037292 | Data Transport in a Virtualized Distributed Antenna System - A system for routing signals in a Distributed Antenna System includes a plurality of local Digital Access Units (DAUs) located at a Local location. Each of the plurality of local DAUs is coupled to each other and operable to route signals between the plurality of local DAUs. Each of the plurality of local DAUs includes one or more Base Transceiver Station (BTS) RF connections. Each of the plurality of BTS RF connections is operable to be coupled to one of one or more sectors of a BTS. The system also includes a plurality of remote DAUs located at a Remote location. The plurality of remote DAUs are coupled to each other and operable to transport signals between the plurality of remote DAUs. | 02-06-2014 |
| 20140050479 | Inter-Optical Line Terminal (OLT) Communication in Multiple-OLT Passive Optical Networks (PONs) - A system comprising a first optical line terminal (OLT) comprising a first integrated optical network unit (ONU), and a first OLT transceiver, and a second OLT coupled to the first OLT, wherein the second OLT comprises a second integrated ONU, and a second OLT transceiver. Included is a first OLT comprising an optical transceiver, at least one processor coupled to the optical transceiver, wherein the processor working in conjunction with the optical transceiver is configured to determine an upstream wavelength corresponding to a second OLT, join, via a first ONU in the first OLT, the second OLT using the upstream wavelength corresponding to the second OLT, and transmit data to the second OLT by the first OLT via the first ONU, wherein the second OLT comprises a second ONU. | 02-20-2014 |
| 20140079398 | Architecture to Communicate with Standard Hybrid Fiber Coaxial RF Signals over a Passive Optical Network (HFC PON) - One or more overlay wavelengths are applied to a GPON architecture to provide sufficient, cost-effective forward bandwidth per home for targeted, unique narrowcast services to allow traditional HFC operators to use a PON architecture with their existing HFC equipment. A separate return path capability using a separate coaxial cable with RF signals to the GPON may also be used. This return capability may be provided either by a fiber optic link or coaxial link from the home. | 03-20-2014 |
| 20140161454 | EXPANDABLE MULTICAST OPTICAL SWITCH - A scalable multicast M×N optical switch (MCS) includes a non-scalable MCS having a plurality of (L+1)×1 selector switches east coupled at one of its L entrance ports to egress ports of the non-scalable MCS, the remaining L−1 entrance ports being coupled to an L*N upgrade ports, where M and N are integers ≧2, and L is an integer ≧1. This allows the scalable MCS to be cascaded in a daisy-chain fashion, providing scalability from the M common ports to L*M common ports. In another embodiment, the selector switches are integrated into the MCS, providing scalability of common MCS ports. | 06-12-2014 |
| 20140219661 | METHOD OF SELECTING WAVELENGTH OF OPTICAL NETWORK UNIT IN PASSIVE OPTICAL NETWORK - Provided is a method of selecting a wavelength of an optical network unit including selecting a pre-loaded default wavelength as an available wavelength candidate or the wavelength that has been changed when a preset wavelength changing condition is satisfied as the available wavelength candidate, acquiring frame synchronization for a downstream signal having the same wavelength as the selected available wavelength candidate, and transmitting a registration request message to an optical line terminal (OLT) from which the downstream signal has been transmitted when the frame synchronization is acquired, assigning the available wavelength candidate to an available wavelength used for communication with the OLT and registering the terminal in the OLT when a registration allowance message is received from the OLT. | 08-07-2014 |
| 20140233952 | Methods and Systems for Delivery of Multiple Passive Optical Network Services - A system for delivering multiple passive optical network services is disclosed. The system includes a first optical transmission service comprising a common wavelength pair routed from a source to each of a plurality of subscribers. The system further includes a second optical transmission service comprising a plurality of unique wavelength pairs, where each of the unique wavelength pairs is routed from the source to a subscriber among the plurality of subscribers. The system delivers the first optical transmission service and the second optical transmission service to the subscriber on a single optical fiber. | 08-21-2014 |
| 20140233953 | PASSIVE OPTICAL NETWORK OPTICAL NETWORK TERMINAL APPARATUS AND CONFIGURATION METHOD - A method of configuring an optical network terminal, ONT, of a wavelength division multiplexed passive optical network, WDM PON. Sequentially setting a transmission wavelength of a tunable optical filter at the ONT to one or more wavelengths of a pre-selected plurality of transmission wavelengths until a wavelength is identified for which no downstream optical signal from an optical line terminal of the WDM PON is detected. Determining whether a transmitter operable at said identified transmission wavelength is present at the OLT and is available to be assigned to communicate with the ONT. If a transmitter is determined to be present and available, maintaining the transmission wavelength of the tunable optical filter at transmission wavelength and assigning the ONT to the OLT as a subscriber at said identified transmission wavelength. If a transmitter is determined to be one of not present and not available, recommencing the method. | 08-21-2014 |
| 20140255031 | INTEGRATED PASSIVE OPTICAL NETWORK (PON) SYSTEM - An integrated passive optical network system is disclosed. The system comprises an optical distribution network (ODN), a time-division multiplexing (TDM)-optical line terminal (OLT), a wavelength-division multiplexing (WDM)-optical line terminal (OLT), a plurality of time-division multiplexing (TDM)-optical network units (ONUs), and at least one wavelength-division multiplexing (WDM)-optical network unit (ONU) comprising a first filter. The TDM-OLT and the WDM-OLT respectively transmit a first optical signal carrying a first downstream signal and a second optical signal carrying a second downstream signal to the ONUs through the ODN, and wavelengths of the second optical signal and the first optical signal are different. The TDM-ONUs respectively retrieve the first downstream signal The WDM-ONU uses the first filter to retrieve the second downstream signal. | 09-11-2014 |
| 20140255032 | OPTICAL NETWORK UNIT - The present invention provides an apparatus, in particular an optical network unit, which comprises a first part operably coupled to an arm of an optical fiber network, the first part comprises an optical module including an optical-electric interface and/or an electric-optical interface locked on a preset wavelength band, and an interface module, and at least one second part operably coupled to a network entity of a communication network, each comprising a control unit, a signal processing unit and an interface module. One of the control units of the at least one second part is set by a optical line terminal of the optical fiber network as a master control unit configured to tune and control the optical module of the first part. The first part and the at least one second part are wireless coupled with respect to each other via the interface modules. | 09-11-2014 |
| 20140294389 | METHOD AND APPARATUS FOR CONTROLLING AN OPTICAL NETWORK UNIT TO RESTART UPON COMPLETION OF DOWNLOADING NEW SOFTWARE - The invention provides a method and apparatus for controlling an optical network unit to restart upon completion of downloading new software. Upon completion of downloading a new software version, an optical network terminal firstly determines a type of an active image request to be transmitted based upon stored values, of a RstDelayTimeRange attribute and of a RstDelayTrafficThreshold attribute, corresponding to the optical network unit, and then transmits the active image request to the optical network unit. The determined active image request may be a first active image request to instruct the optical network unit to immediately restart and activate the new software version that has been downloaded, or may be a second active image request to instruct the optical network unit to set an activation flag and a third active image request to instruct the optical network unit to immediately restart, both of which are used in combination. | 10-02-2014 |
| 20140294390 | METHOD AND APPARATUS FOR PROTECTING FIBER OPTIC DISTRIBUTION SYSTEMS - A fiber optic network has alarmed fiber optic lines in the cables connecting a secured junction box to plural user lock boxes. An outgoing alarm line and return alarm line in each cable connect the junction box to each user box. The outgoing alarm line is looped to the return alarm line inside the user lock box. The return alarm line is looped to the outgoing alarm line of a different cable inside the junction box to interconnect a plurality of alarm lines passing through a plurality of user boxes. A detector detects an alarm signal in the connected alarm lines to trigger an intrusion alarm. | 10-02-2014 |
| 20140294391 | BANDWIDTH ALLOCATION DEVICE AND BANDWIDTH ALLOCATION METHOD - An OLT controller | 10-02-2014 |
| 20140308038 | Method, Device, and Nested System for Allocating Uplink and Downlink Bandwidth - A method for allocating uplink and downlink bandwidth, includes: receiving, by a primary ONU, a primary PON downlink frame sent by a nested OLT, where the primary PON downlink frame carries a primary ONU uplink bandwidth grant and a secondary ONU uplink bandwidth grant; parsing, by the primary ONU, the primary PON downlink frame to acquire the primary ONU uplink bandwidth grant and the secondary ONU uplink bandwidth grant; and sending, by the primary ONU, a secondary PON downlink frame to a secondary ONU, where the secondary PON downlink frame carries the acquired secondary ONU uplink bandwidth grant. The present disclosure achieves an optimal overall performance for the two stages of PONs by considering general conditions of the two stages of PONs, and meanwhile ensures a maximum available bandwidth for the two stages of PONs during formulation of bandwidth grants. | 10-16-2014 |
| 20140314414 | Flexible TWDM PON with Load Balancing and Power Saving - An apparatus comprising an arrayed waveguide grating (AWG) comprising a plurality of AWG ports, a power splitter comprising a plurality of splitter ports, and a plurality of optical interleavers, each coupled to a respective AWG port and a respective splitter port, for directing incoming optical signals to one of the AWG and the power splitter. | 10-23-2014 |
| 20140341578 | ALIGNING AND DIRECTLY OPTICALLY COUPLING PHOTODETECTORS TO OPTICAL DEMULTIPLEXER OUTPUTS IN A MULTICHANNEL RECEIVER OPTICAL SUBASSEMBLY - A multi-channel receiver optical subassembly (ROSA) such as an arrayed waveguide grating (AWG), with outputs directly optically coupled to respective photodetectors such as photodiodes. In one embodiment, an AWG may be configured such that optical components of the AWG do not interfere with direct optical coupling, and the wire bonding points on the photodiodes may also be configured such that wire bonding does not interfere with direct optical coupling. The photodetectors may also be mounted on a photodetector mounting bar with a pitch sufficiently spaced to allow connection to floating grounds. A passive alignment technique may be used to determine the mounting locations on the photodetector mounting bar such that the photodetectors are aligned with the optical outputs. | 11-20-2014 |
| 20140341579 | Statistical Optical Design Enabled Via TWDM-PON - An optical line terminal (OLT) in a time and wavelength division multiplexed (TWDM) passive optical network (PON). The OLT comprises a first optical port, a second optical port, and a processor. The first optical port is configured to couple to a plurality of optical network units (ONUs) via an optical distribution network (ODN). The second optical port is configured to couple to the ONUs via the ODN. The processor is coupled to the first optical port and the second optical port and is configured such that, responsive to receiving information indicating that the first optical port has experienced a greater power loss over time than the second optical port, the OLT assigns to the first optical port a first wavelength with a power greater than the power of a second wavelength assigned to the second optical port. | 11-20-2014 |
| 20140348508 | Method, Terminal, and System for Fiber Network Management - The present invention provides a method, terminal and system for fiber network management. A terminal obtains configuration information from a management system and sending an identifier of a configuration port connected to a fiber to an ODN device to allow the ODN device to indicate, according to the configuration port identifier, a corresponding configuration port into which one end of the fiber is inserted. The method includes sending, according to a received first identifier of one end of the fiber and a corresponding configuration port identifier, which are sent by the ODN device, and a second identifier of the other end of the fiber, which is sent by a detecting module, an identifier of a peer configuration port connected to the fiber to the ODN device to allow the ODN device to indicate, according to the received peer configuration port identifier, a corresponding peer configuration port into which the other end of the fiber is inserted. | 11-27-2014 |
| 20150010307 | INTEGRATED ACCESS NETWORK - The present invention is an optical terminal device comprising a signal modulator configured to generate a first signal modulated onto a first optical sideband of a first optical wavelength signal and a second signal modulated onto a second sideband of the first optical wavelength signal, the first signal being a different type than the second signal; a receiver configured to receive a third signal modulated onto the first optical sideband of a second optical wavelength signal and a fourth signal modulated onto a second sideband of the second optical wavelength signal, the third signal being a different type than the fourth signal; and a circulator coupled to the signal modulator and the receiver, wherein the circulator is configured to communicate with a node of an integrated network via an optical fiber. A remote node, a communication terminal, and a method of performing integrated network access are also disclosed. | 01-08-2015 |
| 20150030332 | ARCHITECTURE TO COMMUNICATE WITH STANDARD HYBRID FIBER COAXIAL RF SIGNALS OVER A PASSIVE OPTICAL NETWORK (HFC PON) - One or more overlay wavelengths are applied to a GPON architecture to provide sufficient, cost-effective forward bandwidth per home for targeted, unique narrowcast services to allow traditional HFC operators to use a PON architecture with their existing HFC equipment. A separate return path capability using a separate coaxial cable with RF signals to the GPON may also be used. This return capability may be provided either by a fiber optic link or coaxial link from the home. | 01-29-2015 |
| 20150043915 | PROVISIONING TIME-VARYING TRAFFIC IN SOFTWARE-DEFINED FLEXIBLE GRID TRANSPORT NETWORKS - A method is provided for provisioning time-varying traffic demands in an optical transport software-defined network. The method includes pre-provisioning an amount of bandwidth for best effort traffic. The method further includes iteratively applying, using a processor, an iterative simulated annealing-based traffic provisioning procedure to determine candidate bandwidths for the best effort traffic in a set of iterations. The method also includes selecting a particular candidate bandwidth that has a corresponding blocking value lower than a given blocking requirement β and that requires a minimum amount of spectrum as compared to other candidate bandwidths. The iteratively applying step includes varying the amount of bandwidth for best effort traffic in each iteration to determine the candidate bandwidths. The iteratively applying step further includes varying an amount of shared bandwidth between neighboring channels, out of the amount of bandwidth for best effort traffic, in each iteration, to further determine the candidate bandwidths. | 02-12-2015 |
| 20150050024 | Traffic-Bearing Entity Identification in Multiple-Wavelength Passive Optical Networks (PONs) - An optical line terminal (OLT) comprises a receiver configured to receive a first message, a processor coupled to the receiver and configured to process the first message, and generate a second message based on the first message, wherein the second message comprises an identification (ID) structure identifying a traffic-bearing entity associated with an optical network unit (ONU), and wherein the ID structure comprises a wavelength ID field, and a transmitter coupled to the processor and configured to transmit the second message. | 02-19-2015 |
| 20150050025 | Digitized Broadcast Signals - Methods, systems, and computer-readable media can facilitate digitizing a broadcast transmission and transporting the digitized broadcast transmission along with one or more digitized narrowcast transmissions to a subscriber. In embodiments, a digitized broadcast transmission and one or more digitized narrowcast transmissions can be separately demodulated and the transmissions can be combined at one or more receiving nodes. In embodiments, a digitized broadcast transmission can be combined with one or more digitized narrowcast transmissions. Lossless compression and de-compression techniques can be used to optimally transport digitized broadcast and narrowcast signals. | 02-19-2015 |
| 20150098704 | WAVELENGTH CONFIGURATION METHOD AND APPARATUS FOR MULTI-WAVELENGTH PASSIVE OPTICAL NETWORK, AND MULTI-WAVELENGTH PASSIVE OPTICAL NETWORK SYSTEM - The present application provides a wavelength configuration method for a multi-wavelength passive optical network, which includes: scanning, by an ONU, a downstream receiving wavelength, and receiving, downstream wavelength information of each downstream wavelength channel that is broadcast by an OLT separately through each downstream wavelength channel of a multi-wavelength PON system; establishing, by the ONU, a downstream receiving wavelength mapping table, where an entry of the downstream receiving wavelength mapping table includes downstream receiving wavelength information, drive current information of a downstream optical receiver and receiving optical physical parameter information of the ONU; selecting, by the ONU, one downstream wavelength from the downstream wavelength information broadcast by the OLT, and setting, according to the drive current information of the downstream optical receiver recorded in a related entry of the downstream receiving wavelength mapping table, an operating wavelength of the downstream optical receiver to the selected downstream wavelength. | 04-09-2015 |
| 20150295840 | METHOD AND APPARATUS FOR TRANSMITTING SIGNALS IN AN OPTICAL TRANSPORT NETWORK - An exemplary method and apparatus are provided for a remapping of Optical Data Units of fixed size into lower order Optical Data Units of flexible size. More particularly, a transport signal which has a frame structure referred to as Optical Transport Units may be transmitted through an Optical Transport Network domain. Each Optical Transport Unit contains at least one Optical Data Unit of fixed size with an overhead section and a payload section. An edge network node of the Optical Transport Network domain receives the transport signal and remaps the at least one Optical Data Unit of fixed size into a domain-internal lower order Optical Data Unit of flexible size. Within the Optical Transport Network domain, the remapped domain-internal lower order Optical Data Unit of flexible size is transmitted as payload of a domain-internal higher order Optical Data Unit of fixed size. | 10-15-2015 |
| 20150304052 | OPTICAL COMBINER ENERGY HARVESTING - Powering an active/splitter and providing information to ONUs to cause adjustments to ONU operating wavelengths. An ONU may identify the port of a splitter to which the ONU is connected in order to make wavelength adjustments. Various techniques enable the ONU to identify from which port the ONU is receiving signals, such as a splitter that splits signals to ONUs in a cable network and signals to one or more ONUs the port to which it is connected. The splitter may lack electrical power and may perform the signal function by harvesting optical power from optical power provided to the splitter. In this manner, an active splitter may behave passively with respect to powering components in the absence of electrical power. | 10-22-2015 |
| 20150311997 | DISTRIBUTED PON TRANSCEIVER ARCHITECTURE - One embodiment provides an optical line terminal (OLT) module in a network device. The OLT module includes an optical signal module, an OLT management module, a scheduler module, and a forwarding module. The optical signal module transmits optical signals to and receives optical signals from a number of optical network units (ONUs). During operation, the OLT management module identifies a remote OLT module operating at a lower upstream data rate than the OLT module. The scheduler module identifies a report message received from a first ONU operating at the lower upstream data rate and generates a grant corresponding to the report message. A grant specifies a time slot for an upstream data burst. The scheduler module includes the grant in a notification frame destined for the remote OLT module. The forwarding module forwards the notification frame to an internal switch of the network device. | 10-29-2015 |
| 20150318950 | METHOD AND SYSTEM FOR SCHEDULING CASCADED PON - One embodiment provides an apparatus for coupling between a trunk passive optical network (PON) and a leaf PON. The apparatus includes a trunk-side optical transceiver coupled to the trunk PON, a leaf-side optical transceiver coupled to the leaf PON, and an integrated circuit chip that includes an optical network unit (ONU) media access control (MAC) module, an optical line terminal (OLT) MAC module, and an on-chip memory. | 11-05-2015 |
| 20150349891 | APPARATUS AND METHOD FOR MANAGING MULTI-WAVELENGTH RESOURCE OF SEPARATE-TYPE BASE STATION OPTICAL LINK - The present disclosure provides a digital unit including: one or more remote apparatus communicators configured to correspond to each of one or more remote apparatuses to process transmitted and received data; a multi-wavelength controller configured to convert data transmitted from each of the one or more remote apparatuses into a wavelength allocated thereto and to transmit the converted data to remote apparatuses via an optical fiber; and a base station controller configured to allocate transmission and reception wavelength to each of the one or more remote apparatus communicators to control the multi-wavelength controller and to transmit wavelength information associated with the wavelength allocation to each of the one or more remote apparatuses. | 12-03-2015 |
| 20150381300 | SYSTEM AND METHOD OF COMPENSATING FOR SPECTRAL EXCURSION - An optical network comprises a plurality of optical network units and an optical line terminal having one or more transmitters and one or more receivers. Each of the one or more transmitters and each of the one or more receivers is configured to operate over a respective wavelength. Each of the optical network units has a respective laser that is optically coupled to a respective one of the one or more transmitters and a respective one of the one or more receivers. The optical line terminal is configured to monitor power levels of respective optical signal burst transmissions from each of the plurality of optical network units and to direct each optical network unit to wavelength bias its respective laser based on the monitored power levels to compensate for a respective wavelength shift experienced by the respective laser during burst transmissions. | 12-31-2015 |
| 20160006535 | Method and Device For Mapping and Demapping Data - Provided are a method and device for mapping and demapping of data. The method comprises: an OTUCnAG comprising an ODUCn with a rate of n*100 gigabits per second to which is added an OTU overhead, is divided according to a byte-interleaving scheme into multiple OTUCmTG; the OTUCmTG respectively are each mapped to a corresponding OCh, and data in the OCh is born on continuous frequency slots for transmission, wherein the rate of the OTUCnAG is n*100 gigabits per second, the rate of the OTUCmTG is m*100 gigabits per second, both m and n are positive integers, and m less than or equal to n. The disclosure increases optical fibre spectrum utilization efficiency and system flexibility and compatibility. | 01-07-2016 |
| 20160105240 | Optical transmission system, mode coupler and optical transmission method - Disclosed is an OLT optical transmission system, which includes: an OLT optical transceiver module configured to send downlink light to a first single-mode waveguide module and receive uplink light input by a multimode waveguide module, the first single-mode waveguide module configured to send the received downlink light to a beam splitting/combination module; the beam splitting/combination module configured to perform beam splitting on the received downlink light to obtain multiple beams of downlink light, send the multiple beams of downlink light to corresponding second single-mode waveguide modules respectively, perform beam combination on multiple beams of received uplink light to obtain one beam of uplink light and send the combined uplink light to the multimode waveguide module; the second single-mode waveguide modules configured to send the multiple beams of received downlink light to multiple corresponding ODNs and send the multiple beams of received uplink light to the beam splitting/combination module; and the multimode waveguide module configured to send the received uplink light to the OLT optical transceiver module the invention discloses a mode coupler and an optical transmission method. By the disclosure, uplink and downlink light multiplexing may be implemented, and in addition, uplink light insertion loss may be reduced. | 04-14-2016 |
| 20160105251 | Re-Modulation Crosstalk and Intensity Noise Cancellation in Wavelength-Division Multiplexing (WDM) Passive Optical Networks (PONs) - An apparatus comprising a signal generator configured to produce a modulation signal, a filter coupled to the signal generator and configured to filter the modulation signal to produce a cancellation signal, and a reflective semiconductor optical amplifier (RSOA) coupled to the signal generator and the filter, wherein the RSOA is configured to generate an optical signal according to a difference between the modulation signal and the cancellation signal and transmit the optical signal towards a partial reflection mirror (PRM). | 04-14-2016 |
| 20160127071 | Tenant Isolation In A Multi-Tent Cloud System - Isolating tenants in a multi-tenant cloud system includes identifying a plurality of tenants in the multi-tenant cloud system, assigning a domain to each tenant of the plurality of tenants based on a wavelength division multiplexing (WDM), for each wavelength set of the plurality of wavelength sets, associating each wavelength set with a different domain of the plurality of domains and with a different indicator identifying the domain for the wavelength set, and isolating each tenant using the associated wavelength sets and associated indicators. The plurality of tenants share computational resources in the multi-tenant cloud system and the domain includes the computational resources for each tenant. The WDM uses a plurality of wavelength sets and each wavelength set includes one or more wavelengths. | 05-05-2016 |
