By Optical Coupling Patents (Class 398/82)
  • Patent number: 10401565
    Abstract: An object of the present invention is to reduce the manufacturing cost of a semiconductor device. A semiconductor device includes a SOI substrate that has an optical waveguide including a semiconductor layer. The optical waveguide is covered with an interlayer insulating film. Wiring parts are formed on the interlayer insulating film. Moreover, a thin film part having a smaller thickness than the wiring parts is formed above the optical waveguide and is integrated with the wiring parts.
    Type: Grant
    Filed: May 11, 2018
    Date of Patent: September 3, 2019
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventor: Tatsuya Usami
  • Patent number: 10382135
    Abstract: In an optical network based on a dense wavelength division multiplexing system using a flexible frequency grid, it is difficult to improve the usage efficiency of an optical frequency band owing to the occurrence of fragmentation of the optical frequency band; therefore, an optical network controller according to an exemplary aspect of the present invention includes an optical frequency region setting means for setting a plurality of optical frequency regions in an optical frequency band used in an optical network based on a dense wavelength division multiplexing system using a flexible frequency grid; an optical path setting means for setting optical paths having a common attribute in at least one of the plurality of optical frequency regions; and an optical frequency region control means for changing an optical frequency width of the optical frequency region, and instructing the optical frequency region setting means to reconfigure, as the plurality of optical frequency regions, a plurality of optical frequ
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: August 13, 2019
    Assignee: NEC CORPORATION
    Inventors: Hitoshi Takeshita, Shinsuke Fujisawa, Tomoyuki Hino, Akio Tajima
  • Patent number: 10277352
    Abstract: A method for noise suppression in a colorless optical add/drop system implemented prior to a colorless optical add/drop device includes, subsequent to receiving an optical signal from an optical modem, filtering the optical signal with a wavelength blocking filter to suppress out of band Amplified Stimulated Emission (ASE) in order to prevent noise funneling in the colorless optical add/drop device; and providing the filtered optical signal with the out of band ASE suppressed therein to a multiplexer port in the colorless optical add/drop device. The method can include, prior to the filtering, amplifying the optical signal with a single channel amplifier, wherein the single channel amplifier can include a pump laser shared with one or more additional single channel amplifiers.
    Type: Grant
    Filed: May 24, 2016
    Date of Patent: April 30, 2019
    Assignee: Ciena Corporation
    Inventors: Paul Chedore, Jean-Luc Archambault
  • Patent number: 10218571
    Abstract: One or more management systems coordinate wavelength configuration patterns of a plurality of multi-wavelength optical transport nodes in an optical network for a first transport period. The one or more management systems determine data traffic demand changes in the optical network; and coordinate wavelength configuration patterns of the plurality of multi-wavelength optical transport nodes in the optical network for a second transport period, that is subsequent to the first transport period, based on the determined data traffic demand changes.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: February 26, 2019
    Assignee: Verizon Patent and Licensing Inc.
    Inventors: Tiejun J. Xia, Glenn A. Wellbrock
  • Patent number: 10171180
    Abstract: A fiber optic-based communications network includes: a power insertion device, connected to multiple fiber links from a data source, configured to provide power insertion to a hybrid fiber/power cable connected to at least one fiber link of the multiple fiber links; the hybrid fiber/power cable, connecting the power insertion device to a connection interface device, configured to transmit data and power from the power insertion device to the connection interface device; and the connection interface device, configured to provide an interface for connection to an end device via a power over Ethernet (PoE)-compatible connection and to provide optical to electrical media conversion for data transmitted from the power insertion device to an end device via the hybrid fiber/power cable and the PoE-compatible connection.
    Type: Grant
    Filed: August 26, 2015
    Date of Patent: January 1, 2019
    Assignee: Radius Universal, LLC
    Inventors: Donald Lee Sipes, Jr., Donald VanderSluis
  • Patent number: 10063944
    Abstract: A remote node includes a first node input, a second node input, and an optical switch. The optical switch includes a first switch input optically coupled to the first node input, a second switch input optically coupled to the second node input, a first switch output switchably coupled to the first switch input or the second switch input, and a second switch output switchably coupled to the first switch input or the second switch input. The remote node includes a photodiode optically coupled to the second switch output, and a capacitor electrically coupled to the photodiode and the optical switch. When the first switch input is switchably coupled to the first switch output, the second switch input is switchably coupled to the second switch output. Light received by the second switch input passes out the second switch output to the photodiode. The photodiode charges the capacitor to a threshold charge.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: August 28, 2018
    Assignee: Google LLC
    Inventors: Liang Du, Yut Loy Chan, Xiangjun Zhao, Changhong Joy Jiang, Cedric Fung Lam, Daoyi Wang, Tao Zhang
  • Patent number: 10003426
    Abstract: Systems and methods for performing wavelength conflict detection are provided. These are to detect situations in optical networks where two instances of the same wavelength channel have been added. Wavelength conflict detection is performed for each of a plurality of possible wavelength channels that could be present in an optical signal, each wavelength channel that is present modulated by a pilot tone signal with a respective pilot tone frequency, the pilot tone signal carrying M-ary pilot tone data, M=2n, n?1, with a respective one of M different sequences being used to represent each of M possible data values over a data value period. Conflict detection for each wavelength channel involves performing correlation peak detection using each of the M different sequences to determine correlation peaks for each of the M different sequences, and, based on the determined correlation peaks, determining whether multiple instances of the wavelength channel are present in the optical signal.
    Type: Grant
    Filed: October 27, 2016
    Date of Patent: June 19, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Zhiping Jiang
  • Patent number: 9952441
    Abstract: The filter transmits a light beam of a second wavelength emitted from each of a plurality of second light sources, reflects other light beams incident from a direction intersecting a traveling direction of the light beam of the second wavelength, and outputs a combined light of the light beam of the second wavelength and the other light beams. The first optical element transmits part of the light beam of the first wavelength emitted from the first light source or part of the light beam of the second wavelength included in the combined light output from the filter, and reflects the other light beams excluding the part thereof in the direction intersecting the traveling direction. The first light receiving element receives the part of the light beam of the first wavelength transmitted by the first optical element or the part of the light beam of the second wavelength.
    Type: Grant
    Filed: November 22, 2016
    Date of Patent: April 24, 2018
    Assignee: FUJITSU OPTICAL COMPONENTS LIMITED
    Inventor: Nobuaki Mitamura
  • Patent number: 9883261
    Abstract: The present invention provides a data switching system, including K subsystems, where a first subsystem in the K subsystems includes M switching apparatuses, a first switching apparatus in the M switching apparatuses includes X network side ports, and the X network side ports include M?1 intra-group ports and K?1 inter-group ports, where the M?1 intra-group ports are respectively connected to M?1 switching apparatuses in the first subsystem except the first switching apparatus; and the K?1 inter-group ports are respectively connected to direct switching apparatuses, of the first switching apparatus, in K?1 subsystems in the K subsystems except the first subsystem. Such a structure improves a capacity of a switching system in a case in which no core switching apparatus is required.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: January 30, 2018
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventor: Qinghua Yan
  • Patent number: 9854336
    Abstract: The integrated network element offers an efficient fiber-chip coupling of multiple outputs of a polarization sensitive photonic integrated circuit (PIC) using a programmable mirror co-packaged with the PIC. Efficient fiber-chip coupling requires precise and active alignment of all free-space components. These constraints can be reduced by using a programmable mirror in the form of a liquid crystal on silicon (LCoS) device. The LCoS can be programmed with patterns that offer highly accurate beam-steering and focusing functionality. Imaging optics may be used at the PIC facet to provide some degree of collimation in the free-space optical path to efficiently illuminate the LCoS. By reprogramming the LCoS switching between two outputs/inputs can be obtained at high speed.
    Type: Grant
    Filed: December 31, 2015
    Date of Patent: December 26, 2017
    Assignee: Infinera Corporation
    Inventors: Philipp Claudius Schindler, Jeffrey Rahn, Rene Schmogrow
  • Patent number: 9729243
    Abstract: An optoelectronic transmitter including a semiconductor substrate, at least one laser source, and a high numerical aperture (NA) waveguide is provided. The laser source is disposed on the semiconductor substrate and configured to emit at least one laser beam. The high numerical aperture (NA) waveguide has an NA greater than or equal to 0.5 and is disposed on the semiconductor substrate. At least a part of the laser beam from the laser source enters the high NA waveguide, wherein no lens is disposed on the light path of the laser beam between the laser source and the high NA waveguide. An optoelectronic receiver and an optoelectronic transceiver are also provided.
    Type: Grant
    Filed: April 23, 2015
    Date of Patent: August 8, 2017
    Assignee: Centera Photonics Inc.
    Inventors: Tzu-Ching Yeh, Hsiao-Chin Lan, Chin-Ta Chen, Po-Kuan Shen
  • Patent number: 9699532
    Abstract: Example embodiments of the systems and methods of hybrid DWDM aggregation and extension for time division multiplexing passive optical networks as disclosed herein solves problems facing cable operators and telecommunications operators by using WDM and DWDM technologies for time division multiplexing passive optical network aggregation and by extending the reach of the TDM PON beyond standard reach limits. An example system uses a downstream optical amplifier and an upstream repeater to extend the reach and for DWDM aggregation of the time division passive optical network.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: July 4, 2017
    Assignee: Cox Communications, Inc.
    Inventor: Yuxin Dai
  • Patent number: 9553881
    Abstract: Apparatus for an optical communications network has optical paths for optical traffic, and optical ports, one of which is an unused output port. A security monitoring system has a blocking part coupled removably to the unused output port to occupy it to prevent unauthorized access. An optical detector can detect optical signals passing through the unused output port to the blocking part, and there is alarm circuitry configured to output an alarm signal based on the detecting of the optical signals. This monitoring can help make the node more secure from interference or from eavesdropping. By blocking the port, the monitoring can be independent of the type of signals on the optical paths. The system can be passive or active, and does not require a change in the installed node configuration and so can be added easily to existing infrastructure.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: January 24, 2017
    Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (publ)
    Inventors: Matteo Costantini, Roberto Magri
  • Patent number: 9515746
    Abstract: An optically enabled multi-chip module has an optical engine transceiver and a host system chip. The optical engine transceiver has an optical engine front-end and an optical engine macro. The optical engine front-end has multiple laser diodes, laser driver circuitry electrically interfaced with each of the laser diodes, multiple photodiodes, amplifier circuitry electrically interfaced with each of the photodiodes, and at least one optical element optically positioned between the laser diodes and at least one optical fiber and between the photodiodes and the at least one optical fiber. The at least one optical element optically interfaces the laser diodes and photodiodes with the optical fiber. The optical engine macro is both electrically interfaced with and physically segregated from the optical engine front-end. The optical engine macro provides a subset of optical transceiver functionality to the optical engine front-end. The host system chip is electrically interfaced with the optical engine transceiver.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: December 6, 2016
    Assignee: FINISAR CORPORATION
    Inventors: Frank J. Flens, Daniel Mahgerefteh, The′ Linh Nguyen, Jimmy Alan Tatum
  • Patent number: 9485026
    Abstract: A scheme is described for remote control of the wavelength of a tunable transmitter in a smart small form-factor pluggable (SFP) transceiver, a smart SFP plus (SFP+) transceiver, a smart 10 gigabit small form-factor pluggable (XFP) transceiver, a smart duplex transceiver, a smart bidirectional (BiDi) transceiver, or a smart single wavelength single fiber (SWSF) BiDi-transceiver in a communication system using an operating system with Operation, Administration, and Maintenance (OAM) and Proprietary Protocol (PP) functions; an OAM, PP & Payload Processor; a transceiver; an optical spectrum analyzer; a bit error rate test (BERT); and an optical link in the field.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: November 1, 2016
    Assignee: OE SOLUTIONS CO., LTD.
    Inventors: Kwang Soo Park, Moon Soo Park
  • Patent number: 9270373
    Abstract: A data transport system for transporting data and auxiliary signals over an optical link comprises a transmitter, a receiver and an optical link. The transmitter and receiver are coupled to a first end of the optical link. The optical link includes a number of optical channels. A controller is coupled to the transmitter and the receiver, and controls the transmitter and the receiver to operate in a first state when data are detected at an input of the transmitter. Data are transported via the data transport system in the first state. The controller controls the transmitter and the receiver to operate in a second state when the data are detected as absent at the input of the transmitter. Data are prevented from being transported via the data transport system in the second state.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: February 23, 2016
    Assignee: SAMTEC, INC.
    Inventors: Eric Zbinden, Thomas Benjamin Troxell, Ashraf M. Wahba, David Daniel Stark, David A. Langsam
  • Patent number: 9191109
    Abstract: A data transport system for transporting data and auxiliary signals over an optical link comprises a transmitter, a receiver and an optical link. The transmitter and receiver are coupled to a first end of the optical link. The optical link includes a number of optical channels. A controller is coupled to the transmitter and the receiver, and controls the transmitter and the receiver to operate in a first state when data are detected at an input of the transmitter. Data are transported via the data transport system in the first state. The controller controls the transmitter and the receiver to operate in a second state when the data are detected as absent at the input of the transmitter. Data are prevented from being transported via the data transport system in the second state.
    Type: Grant
    Filed: November 7, 2012
    Date of Patent: November 17, 2015
    Assignee: SAMTEC, INC.
    Inventors: Eric Zbinden, Thomas Benjamin Troxell, Ashraf M. Wahba, David Daniel Stark, David A. Langsam
  • Patent number: 9191110
    Abstract: A method includes monitoring, by a transceiver, a first wavelength corresponding to a transmitted optical signal. The method includes monitoring a second wavelength corresponding to a received optical signal. The method also includes determining whether the first wavelength is identifiably different than the second wavelength. The method includes maintaining a separation between the first and second wavelengths if the first and second wavelengths are identifiably different. The first and second wavelengths are separated if the first and second wavelengths are not identifiably different. The method further includes maintaining the separation between the first and second wavelengths following separation of the first and second wavelengths.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: November 17, 2015
    Assignee: Verizon Patent and Licensing Inc.
    Inventors: Tiejun J. Xia, Glenn A. Wellbrock
  • Patent number: 9164242
    Abstract: An apparatus and method for splitting and controlling optical powers provided by an input fiber and received by a plurality of output fibers comprises: (a) providing a first collimated beam from the input fiber using a first lens; (b) splitting the first collimated beam into a plurality of separated collimated beams having different directions using a collimated beam splitting device; (c) controlling area of each separated collimated beam by moving the collimated beam splitting device on a plane perpendicular to the first collimated beam; and (d) focusing the plurality of separated collimated beams using a second lens and coupling the focused beams into the plurality of output fibers, respectively.
    Type: Grant
    Filed: September 5, 2013
    Date of Patent: October 20, 2015
    Assignee: Alliance Fiber Optic Products, Inc.
    Inventors: Yao Li, Xiaoxu Li, Xinzhong Wang
  • Patent number: 9166725
    Abstract: The invention relates to an optical network element, particularly an optical line terminal, OLT, for transmitting and receiving signals wire an optical network that comprises at least one optical fiber link and at least one further optical network element. The optical network element provides a primary optical pumping mean for emitting optical pump power to set at least one optical fiber link. The emitted optical pump power forms at least one gain medium outside the optical network element to provide optical pump power to the network for amplifying the singles to receive so that outside of the domain of the optical network element no electrical energy supply is needed.
    Type: Grant
    Filed: June 25, 2014
    Date of Patent: October 20, 2015
    Assignee: ADVA Optical Networking SE
    Inventors: Klaus Grobe, Andreas Faerbert
  • Patent number: 9054832
    Abstract: The present invention includes novel techniques, apparatus, and systems for optical WDM communications. Tunable lasers are employed to generate respective subcarrier frequencies which represent subchannels of an ITU channel to which client signals can be mapped. In one embodiment, subchannels are polarization interleaved to reduce crosstalk. In another embodiment, polarization multiplexing is used to increase the spectral density. Client circuits can be divided and combined with one another before being mapped, independent of one another, to individual subchannels within and across ITU channels. A crosspoint switch can be used to control the client to subchannel mapping, thereby enabling subchannel protection switching and hitless wavelength switching.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: June 9, 2015
    Assignee: TREQ LABS, INC.
    Inventors: Chris Wilhelm Barnard, Piotr Myslinski, Colin John Wright
  • Patent number: 9025957
    Abstract: Optical equipment for 1G-EPON, 10G-EPON, and CWDM services are joined together using a novel combination of optical power splitters and multiplexers. This combination of splitters and multiplexers can be disposed in a single housing, which reduces the size of the combination and improves performance, since jumpers between multiple, separately packaged, optical components can be avoided. One example of the inventive techniques and circuits disclosed herein is a combiner/separator circuit for combining and separating 1G-EPON and 10G-EPON signals. In the example application detailed herein, where EPON equipment is combined with CWDM equipment, an important advantage of this optical circuit is its ability to provide return wavelength isolation for EPON systems that have separate ports for 1G and 10G services.
    Type: Grant
    Filed: July 24, 2013
    Date of Patent: May 5, 2015
    Assignee: All Systems Broadband, Inc.
    Inventor: Donald James Gross
  • Patent number: 9020352
    Abstract: The present invention relates to an optical communication module, which includes: a first bidirectional multiplexer; a second bidirectional multiplexer; an optical fiber for connecting the first bidirectional multiplexer and the second bidirectional multiplexer to each other; one or more first light emitting devices connecting to the first bidirectional multiplexer, and operating in a first light emitting wavelength band; one or more first light receiving devices connecting to the first bidirectional multiplexer, and operating in a first light receiving wavelength band; one or more second light receiving devices connecting to the second bidirectional multiplexer, and operating in a second light receiving wavelength band; and one or more second light emitting devices connecting to the second bidirectional multiplexer, and operating in a second light emitting wavelength band.
    Type: Grant
    Filed: November 3, 2011
    Date of Patent: April 28, 2015
    Assignee: Opticis Co., Ltd.
    Inventor: Hyunee Shin
  • Patent number: 9020351
    Abstract: An optical waveguide can transmit multiple optical signals imprinted or encoded with different information, thereby increasing the waveguide's information carrying capability or bandwidth. Each optical signal can comprise multiple longitudinal modes that are energized and that are modulated substantially in unison. Thus, the photonic energy of each optical signal can be spread across a wavelength region in a substantially discrete or substantially discontinuous pattern. The respective wavelength regions of the optical signals can overlap or substantially overlay one another. Modes of one of the optical signals can be substantially interleaved, interspersed, or intermingled with modes of other optical signals. Systems at ends of the optical waveguide can feed the optical signals onto and off of the optical waveguide and discriminate the optical signals from one another. The systems can comprise ring resonators. The waveguide can support an on-chip network, such as for a multicore processor of a computer.
    Type: Grant
    Filed: December 16, 2013
    Date of Patent: April 28, 2015
    Assignee: Cirrex Systems, LLC
    Inventor: Michael L. Wach
  • Publication number: 20150110493
    Abstract: An optical demultiplexing device includes an optics body, a minor, optical filters, and opto-electronic detectors. The optics body has a fiber port configured to receive an end of an optical fiber, a reflective surface aligned with the fiber port, a substantially planar filter mounting surface, and a substantially planar mirror mounting surface. The filter mounting surface and the minor mounting surface are parallel to one another and formed on the same side of the optics body as each other. The minor is mounted on the minor mounting surface, and the filters are mounted on the filter mounting surface. Each filter is transparent to a different wavelength and is interposed in an optical path between one of the opto-electronic detectors and the reflector.
    Type: Application
    Filed: October 18, 2013
    Publication date: April 23, 2015
    Applicant: Avago Technologies General IP (Singapore) pte. Ltd .
    Inventors: Albert Wooi-Quan Khor, Tak-Kui Wang, Li Ding, Ye Chen
  • Patent number: 9014562
    Abstract: A wavelength division multiplexed optical communication system includes a plurality of optical line terminals which may be part of separate in service networks, each having a line interface and an all-optical pass-through interface including a plurality of pass-through optical ports, and each also including a plurality of local optical ports which are connectable to client equipment and an optical multiplexer/demultiplexer for multiplexing/demultiplexing optical wavelengths. The optical multiplexer/demultiplexer may include one or more stages for inputting/outputting individual wavelengths or bands of a predetermined number of wavelengths, or a combination of bands and individual wavelengths.
    Type: Grant
    Filed: March 5, 2008
    Date of Patent: April 21, 2015
    Assignee: Coriant Operations, Inc.
    Inventors: Ornan A. Gerstel, Rajiv Ramaswami
  • Patent number: 9008514
    Abstract: Example embodiments of the present invention relate to An optical node comprising of at least two optical degrees; a plurality of directionless add/drop ports; and at least one wavelength equalizing array, wherein the at least one wavelength equalizing array is used to both select wavelengths for each degree, and to perform directionless steering for the add/drop ports.
    Type: Grant
    Filed: June 22, 2013
    Date of Patent: April 14, 2015
    Inventors: Mark E. Boduch, Kimon Papakos
  • Patent number: 9002203
    Abstract: A method for data processing of an optical network element is provided, wherein a configuration information is received at the optical network element and a light signal is adjusted to a wavelength or wavelength range indicated by said configuration information; wherein an incoming optical signal is demodulated via the light signal and mixed as an electrical demodulated signal with a signal of an oscillator; wherein the signal of the oscillator is tuned to improve a reception of the incoming signal at the optical network element; and wherein the light signal is used for upstream modulation to provide a modulated optical upstream signal. Furthermore, an according device and a communication system are suggested including at least one such device.
    Type: Grant
    Filed: March 11, 2010
    Date of Patent: April 7, 2015
    Assignee: Xieon Networks S.a.r.l.
    Inventors: Thomas Treyer, Karl Kloppe, Harald Rohde
  • Patent number: 9002206
    Abstract: Wavelength-based optical power provisioning is provided by multiplexing a plurality of continuous wave light beams at different wavelengths onto a single optical fiber as a multiplexed light source and demultiplexing the multiplexed light source based on wavelength at a photonic unit coupled to the optical fiber to recover the continuous wave light beams. The recovered continuous wave light beams are split into a plurality of light beams by the photonic unit, each light beam having the same wavelength and the same or lower power as one of the recovered continuous wave light beams so that at least one of the light beams generated by the photonic unit has a higher power than the other light beams generated by the photonic unit.
    Type: Grant
    Filed: July 10, 2012
    Date of Patent: April 7, 2015
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Qing Xu, Robert Brunner, Stephane Lessard
  • Publication number: 20150093115
    Abstract: A semiconductor optical element and an optical module in which extinction ratio variation among integrated optical modulation elements is reduced. An optical module has a wavelength multiplexer that multiplexes light respectively emerging from electric-field-absorption modulator (EAM) portions of integrated optical modulation elements, and that outputs the multiplexed light. The integrated optical modulation element has a signal input terminal, a laser element portion, and an EAM portion. Each of the integrated optical modulation elements has a difference between an oscillation wavelength and a barrier layer bandgap wavelength, represented as an LDBG wavelength difference. Variation of the LDBG wavelength differences is limited within a range of ±1 nm.
    Type: Application
    Filed: May 1, 2014
    Publication date: April 2, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Asami Uchiyama, Koichi Akiyama, Yusuke Azuma, Yoshimichi Morita, Takeshi Yamatoya
  • Patent number: 8995845
    Abstract: A multi-laser transmitter optical subassembly may include N number of lasers, where each laser is configured to generate an optical signal with a unique wavelength. The transmitter optical subassembly may further include a focusing lens and a filter assembly. The filter assembly may combine the optical signals into a combined signal that is received by the focusing lens. The filter assembly may include N?1 number of filters. Each of the filters may pass at least one of the optical signals and reflect at least one of the optical signals. The filters may be low pass filters, high pass filters, or a combination thereof.
    Type: Grant
    Filed: January 9, 2012
    Date of Patent: March 31, 2015
    Assignee: Finisar Corporation
    Inventors: Tengda Du, Bernd Huebner
  • Patent number: 8988968
    Abstract: There is described an optical seismic cable (2) comprising a number of sensor units (5) spaced along the length of the cable and a number of connection units (4) spaced along the length of the cable, the cable further comprising a number of first optical fibers extending substantially continuously along the cable from one connection unit to the next, and a number of second optical fibers which each extend part-way along the cable between adjacent connection units, and wherein at each connection unit at least one first optical fiber is joined to a second optical fiber, and wherein at the sensor units sensors are joined to said second optical fibers.
    Type: Grant
    Filed: May 23, 2008
    Date of Patent: March 24, 2015
    Assignee: TGS Geophysical Company (UK) Limited
    Inventors: Philip Nash, Michael Henshaw
  • Patent number: 8983297
    Abstract: Methods and devices are provided to facilitate production of optical signals that exhibit reduced crosstalk noise and intersymbol interference. In some configurations, a multi-stage optical interleaver, including a first and a second optical interleaver, is used to process a first and a second set of input optical channels. The composite optical output of the multi-stage interleaver includes the first set of optical channels and the second set of optical channels, where each of the first and second set of input optical channels is processed once by the first optical interleaver and once by the second optical interleaver. As such, the first and second sets of input optical channels are each filtered twice using only two optical interleavers.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: March 17, 2015
    Assignee: ZTE (USA) Inc.
    Inventors: Hung-Chang Chien, Jianjun Yu, Ze Dong
  • Patent number: 8977129
    Abstract: Various architectures of a multi-degree reconfigurable optical add-drop multiplexer with reduced contention are provided. These architectures allow the degree of contention reduction to be managed in a flexible and modular way. The degree of the node and the amount of add/drop at the node can also be managed in a flexible and modular way. This Abstract is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: March 10, 2015
    Assignee: Empire Technology Development LLC
    Inventor: Trenton Gary Coroy
  • Patent number: 8976445
    Abstract: Methods, systems and devices implement optical tapped delay lines. In one aspect, a device includes an optical tapped delay (TDL) including a wavelength conversion element, and a dispersive element, coupled with the wavelength conversion element, to impose a relative delay to an optical signal. The optical TDL can include a nonlinear element to combine signals in a phase coherent manner. The wavelength conversion element can include an optical nonlinear device such as a periodically poled lithium niobate (PPLN) or a highly nonlinear fiber (HNLF) with a high nonlinear coefficient and a low dispersion slope to effect four-wave mixing (FWM). The dispersive element can have a low dispersion slope, and the delays effected by the optical TDL can be tunable.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: March 10, 2015
    Assignee: University of Southern California
    Inventors: Alan E. Willner, Mohammad R. Chitgarha, Salman Khaleghi, Omer F. Yilmaz
  • Publication number: 20150063815
    Abstract: A fiber-to-the-antenna (FTTA) system includes a multi-fiber cable configured to be operatively coupled to fiber optic equipment on the ground, and a fiber optic demarcation unit comprising an adapter optically coupled to the multi-fiber cable. The FTTA system also includes a multi-fiber jumper cable comprising a push-pull connector at one end configured to optically couple to a respective adapter of the fiber optic demarcation unit. Additionally, the FTTA system includes a remote radio head optically coupled to one of the plurality of ports of the fiber optic demarcation unit. The fiber optic demarcation unit can include a strain relief device attached to a housing of the unit and to the multi-fiber cable such that a load of the multi-fiber cable is transferred from an interface between the multi-fiber cable and the housing of the fiber optic demarcation unit.
    Type: Application
    Filed: August 29, 2013
    Publication date: March 5, 2015
    Inventors: Atikem HAILE-MARIAM, Ravindra K. VORA, Benoy SARASAN, Beevi M. MOHAMMEDALI, P. V. ASHWIN
  • Patent number: 8965208
    Abstract: The multi-channel optical device includes a demultiplexer in a laser cavity. The demultiplexer is configured to demultiplex a multi-channel light beam into a plurality of channels. The demultiplexer limits the wavelengths of the channels that are output from the laser cavity. The gain element includes quantum dots as the gain medium.
    Type: Grant
    Filed: May 6, 2010
    Date of Patent: February 24, 2015
    Assignee: Kotura, Inc.
    Inventor: Mehdi Asghari
  • Patent number: 8965198
    Abstract: A method for shared mesh restoration includes configuring a switch to allow sharing of a plurality of backup line cards across a plurality of node degrees associated with a reconfigurable optical add/drop multiplexer (ROADM). The switch is communicatively coupled to the ROADM. The method further includes configuring a number of backup line cards coupled to the switch. The number of backup line cards is based on determining a number of active backup lightpaths for each of a plurality of network failures associated with each of the plurality of node degrees of the ROADM, identifying which node degree and failure has the largest number of active backup lightpaths for all of the plurality of node degrees of the ROADM and for each of the plurality of network failures, and determining the number of backup line cards to configure based on the identified largest number of active backup lightpaths.
    Type: Grant
    Filed: October 23, 2012
    Date of Patent: February 24, 2015
    Assignee: Fujitsu Limited
    Inventors: Qiong Zhang, Paparao Palacharla, Xi Wang, Motoyoshi Sekiya
  • Patent number: 8958693
    Abstract: A wavelength selective switch includes a light input/output unit that includes an input unit and an output unit of a wavelength multiplexed light arranged in a form of an array in a first direction, a light dispersing unit that receives the wavelength multiplexed light from the input unit and disperses the wavelength multiplexed light into signal wavelengths, a light condensing element that condenses the light dispersed into the signal wavelengths, and a light deflecting element array that deflects a signal light in the first direction and a second direction, that is orthogonal to the first direction, so as to switch the light of the signal wavelengths condensed by the light condensing element to a desired output unit.
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: February 17, 2015
    Assignee: JDS Uniphase Corporation
    Inventor: Koji Matsumoto
  • Patent number: 8948598
    Abstract: A method for communicating in a passive optical network (PON), includes receiving traffic from a plurality of optical network units (ONUs) transmitting in an upstream transmission channel, wherein each of the ONUs may transmit at any wavelength within a wavelength band associated with the upstream transmission channel. The method also includes dividing the upstream transmission channel into a plurality of sub-channels, that each include a subset of the wavelength band associated with the upstream transmission channel. The method further includes determining the identity of each of the plurality of ONUs transmitting in each of the sub-channels, assigning a plurality of ONUs transmitting in the upstream transmission channel to each of at least two of the sub-channels based on the determination of the ONUs transmitting in that sub-channel, and allocating transmission timeslots for time-shared transmission by the ONUs in one or more of the sub-channels.
    Type: Grant
    Filed: September 18, 2008
    Date of Patent: February 3, 2015
    Assignee: Fujitsu Limited
    Inventor: Martin Bouda
  • Patent number: 8942563
    Abstract: 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 wavelength in real time. The wavelength tunable device may be, in exemplary embodiments, an optical transponder, wavelength division demultiplexer, or wavelength division multiplexer. In embodiments where the optical equipment has a plurality of tunable ports, the display device is adapted to display the operating wavelength of each tunable port.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: January 27, 2015
    Assignee: AT&T Intellectual Property II, L.P.
    Inventor: Guodong Zhang
  • Patent number: 8909047
    Abstract: A modular interconnect includes an mn-by-mn fully connected, direct broadcast, point-to-point, all-to-all interconnect fabric, wherein the mn-by-mn fully connected, direct broadcast, point-to-point, all-to-all interconnect fabric is non-blocking and congestion free, and wherein m is an integer?2 and n is an integer?2. Operating the modular interconnect includes distributing each of mn inputs to each and every one of mn outputs.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: December 9, 2014
    Assignee: LightFleet Corporation
    Inventor: William B Dress
  • Patent number: 8909054
    Abstract: Embodiments of the present invention relate to a bi-direction optical sub-assembly and an optical transceiver. A transmitter in the bi-direction optical sub-assembly is configured to transmit a first communication signal or a detection signal, where the first communication signal or the detection signal is input from a first end of a first optical path and output from a second end of the first optical path, enters a second end of a third optical path through reflection of a WDM optical filter, and is input from a first end of the third optical path to an optical fiber. A second communication signal received by the optical fiber is input from the first end of the third optical path and output from the second end of the third optical path, and the second signal is received by a BOSA receiver through transmission of the WDM optical filter.
    Type: Grant
    Filed: November 27, 2012
    Date of Patent: December 9, 2014
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Xueming Zhang
  • Patent number: 8909053
    Abstract: 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.
    Type: Grant
    Filed: June 24, 2010
    Date of Patent: December 9, 2014
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventor: John T. Brassil
  • Patent number: 8903242
    Abstract: The invention relates to a directionless and colorless reconfigurable optical add/drop multiplexer (ROADM) for a number of clients comprising: an add/drop interface for optical signals of at least one optical network, wherein each received optical signal is split by at least one optical splitter into optical signals which are applied to a downstream cross connector distributing the split optical signals to wavelength selectors of different clients, wherein each wavelength selector performs a wavelength selection of at least one wavelength from the distributed optical signals, wherein an optical signal having a selected wavelength (?) is applied to a client transponder of a client.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: December 2, 2014
    Assignee: ADVA Optical Networking, SE
    Inventors: Dogan Atlas, Xiaoping Wu
  • Patent number: 8903240
    Abstract: An apparatus includes a first optical switching complex, a second optical switching complex in optical communication with the first optical switching complex, and an optical add/drop module in optical communication with the first optical switching complex and the second optical switching complex. At least one of the optical switching complexes includes a wavelength selective switch that is configured to be arranged in a cascaded configuration that, when so configured, results in an increase in a number of available transmit and receive ports available per degree of the apparatus.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: December 2, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Lorenzo Ghioni, Enrico Self, Stefano Piciaccia, Maurizio Gazzola, Ronald Johnson, Luca Della Chiesa
  • Patent number: 8903241
    Abstract: Disclosed are, inter alia, methods, apparatus, computer-storage media, mechanisms, and means associated with registration of optical device characteristics of optical network devices with an optical control layer of the optical network for use in establishing compatible connections through the optical network. Especially end network devices and internal network optical devices that regenerate the optical signal register their communication capabilities of their optical interfaces with the optical control layer of an optical network. This registration allows a light path to be established through the optical network which is compatible with the registered capabilities. The optical control layer may be centralized in an optical layer server and/or distributed among optical devices in the optical network, such as on control processors in multiple, optical layer devices.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: December 2, 2014
    Assignee: Cisco Technology, Inc.
    Inventors: Ornan Alexander Gerstel, David Delano Ward
  • Patent number: 8886035
    Abstract: Proposed is an efficient method of configuration of a transmitter and a receiver for realizing an optical transmission/reception module apparatus including at least one transmission wavelength and two or more reception wavelengths over a time division multiple access passive optical network or an optical network using multiple transmission/reception wavelengths. Further, proposed is a method of configuration of an apparatus which enables optical alignment and assembly in a single package by using a single lens and three different WDM optical filters for a reception module capable of receiving four wavelengths.
    Type: Grant
    Filed: August 21, 2012
    Date of Patent: November 11, 2014
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Jong Deog Kim, Jong Jin Lee
  • Patent number: 8873961
    Abstract: An optical de-multiplexer (de-MUX) that includes an optical device that images and diffracts an optical signal using a reflective geometry is described, where a free spectral range (FSR) of the optical device associated with a given diffraction order abuts FSRs associated with adjacent diffraction orders. Moreover, the channel spacings within diffraction orders and between adjacent diffraction orders are equal to the predefined channel spacing associated with the optical signal. As a consequence, the optical device has a comb-filter output spectrum, which reduces a tuning energy of the optical device by eliminating spectral gaps between diffraction orders of the optical device.
    Type: Grant
    Filed: August 9, 2011
    Date of Patent: October 28, 2014
    Assignee: Oracle International Corporation
    Inventors: Ying Luo, Xuezhe Zheng, Guoliang Li, Kannan Raj, Ashok V. Krishnamoorthy
  • Patent number: 8873962
    Abstract: A method includes determining a line rate selection for a flexible optical wavelength-division-multiplexing WDM network, determining a traffic routing in said network, and determining simultaneously a channel routing, wavelength assignment and spectrum allocation in said network based on an auxiliary graph.
    Type: Grant
    Filed: March 30, 2012
    Date of Patent: October 28, 2014
    Assignee: NEC Laboratories America, Inc.
    Inventors: Ankitkumar N. Patel, Philip Nan Ji, Jason P. Jue, Ting Wang, Yoshiaki Aono