Matrix Switch (i.e., M X N, Where M And N Are 3 Or More) Patents (Class 385/17)
  • Patent number: 10788658
    Abstract: Optical cross connects and methods for use therewith are described herein. In an embodiment, an optical cross connect includes first and second mirror arrays, first and second light sources that respectively emit first and second color coded light beams (e.g., each of which includes red, green and blue light), and first and second cameras configured to respectively capture first and second color images of the first and second color coded light beams reflected respectively from the first and second mirror arrays. The optical cross connect also includes a controller configured to perform closed loop feedback control of the first and second mirror arrays, based on the first and second color images, when the controller controls how optical signals are transferred between individual optical fibers in a first bundle of optical fibers and individual optical fibers in a second bundle of optical fibers.
    Type: Grant
    Filed: January 10, 2018
    Date of Patent: September 29, 2020
    Assignee: Futurewei Technologies, Inc.
    Inventors: Jianmin Gong, Francis Man, Dongyu Geng, Xin Tu, Ming Li, Peng Zhang
  • Patent number: 10757489
    Abstract: Data center interconnections, which encompass WSCs as well as traditional data centers, have become both a bottleneck and a cost/power issue for cloud computing providers, cloud service providers and the users of the cloud generally. Fiber optic technologies already play critical roles in data center operations and will increasingly in the future. The goal is to move data as fast as possible with the lowest latency with the lowest cost and the smallest space consumption on the server blade and throughout the network.
    Type: Grant
    Filed: November 4, 2019
    Date of Patent: August 25, 2020
    Assignee: Aeponyx Inc.
    Inventors: Francois Menard, Martin Berard, Jonathan Briere
  • Patent number: 10739623
    Abstract: The invention relates to a waveguide comprising a substrate (1) on which a layer stack (2) of at least two layer formations (3a, 3b) is arranged, each layer formation (3a, 3b) having at least one transparent dielectric layer (3a1, 3b2), in particular with a higher refractive index than the substrate (1). A structure which influences light propagation, in particular a structure (4) which extends in a layer-like manner, at least in some regions, is arranged between two adjacent layer formations (3a, 3b), the position of the structure (4) in the layer stack corresponding to a node position of a waveguide mode which can be guided in the waveguide and has at least one, preferably exactly one node (5a). The waveguide comprises at least one means for at least temporarily changing the position of the node (5a) of a guided waveguide mode and the structure (4) relative to each other.
    Type: Grant
    Filed: October 20, 2017
    Date of Patent: August 11, 2020
    Assignee: BERGISCHE UNIVERSITAET WUPPERTAL
    Inventor: Patrick Goerrn
  • Patent number: 10694268
    Abstract: Data center interconnections, which encompass WSCs as well as traditional data centers, have become both a bottleneck and a cost/power issue for cloud computing providers, cloud service providers and the users of the cloud generally. Fiber optic technologies already play critical roles in data center operations and will increasingly in the future. The goal is to move data as fast as possible with the lowest latency with the lowest cost and the smallest space consumption on the server blade and throughout the network.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: June 23, 2020
    Assignee: AEPONYX INC.
    Inventors: Francois Menard, Martin Bérard, Jonathan Briere
  • Patent number: 10666363
    Abstract: Embodiments of the present application provide a method and an apparatus for transmitting an optical signal and a wavelength selective switch. The transmission method includes: performing diffraction processing on an input optical signal, to obtain signal light and crosstalk light. The signal light is output to a target output port in a plurality of output ports. The diffraction processing includes deflecting, in a second direction, a diffraction direction of a part or all of the crosstalk light, so that the part or all of the crosstalk light is output to an area outside the output ports.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: May 26, 2020
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Liangjia Zong, Han Zhao, Zhiyong Feng, Yunfei Yan
  • Patent number: 10656496
    Abstract: An optical device includes a row of optical units, each of the optical units comprising an antenna element and an associated phase shifting element, a first optical power splitter optically coupled to a first optical input/output element, and a first plurality of boundary adjustment elements. In the optical phased array, each of the first plurality of boundary adjustment units optically couples the first optical power splitter to different sub-rows of the row of optical units, and each of the plurality of boundary adjustment elements include a sub-row amplitude adjustment element and a sub-row phase adjustment element.
    Type: Grant
    Filed: August 2, 2017
    Date of Patent: May 19, 2020
    Assignee: University of Southern California
    Inventors: Hossein Hashemi, SungWon Chung, Hooman Abediasl
  • Patent number: 10651938
    Abstract: Methods and apparatus for providing enhanced optical networking service and performance which are particularly advantageous in terms of low cost and use of existing infrastructure, access control techniques, and components. In the exemplary embodiment, current widespread deployment and associated low cost of Ethernet-based systems are leveraged through use of an Ethernet CSMA/CD MAC in the optical domain on a passive optical network (PON) system. Additionally, local networking services are optionally provided to the network units on the PON since each local receiver can receive signals from all other users. An improved symmetric coupler arrangement provides the foregoing functionality at low cost. The improved system architecture also allows for fiber failure protection which is readily implemented at low cost and with minimal modification.
    Type: Grant
    Filed: December 3, 2018
    Date of Patent: May 12, 2020
    Assignee: TIME WARNER CABLE ENTERPRISES LLC
    Inventors: Jun Xu, Nanjian Qian
  • Patent number: 10620376
    Abstract: Embodiments of the present invention provide a reconfigurable optical add/drop multiplexer, including: an input component, an output component, a beamsplitter, a first switch array, a wavelength dispersion system, a redirection system, and a second switch array. The input component includes M+P input ports, the output component includes N output ports, the beamsplitter is configured to: receive M input beams from M input ports, and split each of the M input beams into at least N parts, to obtain at least M×N beams; the first switch array includes at least P switch units; and the second switch array includes N rows of switch units. The first switch array, the beamsplitter, the wavelength dispersion system, the redirection system, and the second switch array are arranged so that P optical add beams and sub-beams of M×N beams in the at least M×N beams can be routed to the N output ports.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: April 14, 2020
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Yunfei Yan, Zhiyong Feng, Han Zhao, Liangjia Zong
  • Patent number: 10614843
    Abstract: A recording head has a waveguide core with an input end proximate an energy source at an input surface of the recording head. The waveguide core couples light from the energy source to a near-field transducer that heats a recording medium in response to the light. An input coupler extends along the waveguide core from the input end to a termination region that is away from the input end in a light propagation direction. The input coupler has a first refractive index between that of the waveguide core and a surrounding material. The input coupler is wider than the waveguide core and has a slanted edge at the termination region. The slanted edge crosses the waveguide core such that the input coupler narrows to a neck away from the waveguide core in a crosstrack direction.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: April 7, 2020
    Assignee: Seagate Technology LLC
    Inventors: Christopher Neil Harvey, Kelly Elizabeth Callan, Aidan Dominic Goggin, John Bernard McGurk, Reyad Mehfuz, Christopher Gerwyn Ward
  • Patent number: 10578807
    Abstract: An optical apparatus comprising a reflective optical modulator and an integrated planar lightwave circuit. The circuit can have one or more pairs of input and output planar waveguides thereon. The input planar waveguide is optically coupleable to a first optical fiber and the output optical waveguide is optically coupleable to a second optical fiber. End segments of the input planar waveguide and the output planar waveguide are tilted towards each other such that the input planar waveguide is able to direct an optical signal from the planar lightwave circuit to a reflective modulator. The reflective optical modulator is configured to data modulate the optical signal and transmit said data modulated optical signal to the end segment of the output planar waveguide.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: March 3, 2020
    Assignee: Nokia of America Corporation
    Inventor: Mark P. Earnshaw
  • Patent number: 10541754
    Abstract: Optical fiber networks, devices, and related methods are disclosed herein. In some aspects, an optical fiber network includes network devices having optical fibers for transmitting and receiving data. In the network, 100% of the optical fibers are utilized end-to-end across the plurality of network devices. Networks herein are also devoid of converters and include only a single direction connection between fibers at interconnect points between devices. Network devices may include ferrules, where at least some of the ferrules are devoid of an optical fiber. A method for providing an optical fiber network includes providing network devices having optical fibers for transmitting and receiving data and transmitting data using 100% of the optical fibers end-to-end across the network devices.
    Type: Grant
    Filed: June 20, 2014
    Date of Patent: January 21, 2020
    Assignees: Sumitomo Electric Lightwave Corp., Sumitomo Electric Industries, Ltd.
    Inventors: Tsutomu Watanabe, William Dmytro Charuk, Jamie Joshue Seawell, Yukihiro Yokomachi
  • Patent number: 10509175
    Abstract: This application discloses an optical switch and an optical switching system. Both a first waveguide and a second waveguide of the optical switch are immovable relative to a substrate and are located in a first plane. A first deformable waveguide is also located in the first plane. A first section of the first deformable waveguide is fixed relative to the substrate, and a second section other than the first section can deform under control of a first actuator. When the first deformable waveguide is in a first state, the first deformable waveguide is optically decoupled from the first waveguide and the second waveguide, and the optical switch is in a through state. When the first deformable waveguide is in a second state, the first deformable waveguide is optically coupled to the first waveguide and the second waveguide, and the optical switch is in a drop state.
    Type: Grant
    Filed: January 2, 2019
    Date of Patent: December 17, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventor: Xin Tu
  • Patent number: 10487356
    Abstract: Optical delivery devices and integrated analytical systems comprising the optical delivery devices are provided. The optical delivery devices include optical inputs, optical outputs, and integrated optical waveguides that are configured for coupling of optical energy to a target waveguide device through free space. The integrated analytical systems include the optical delivery devices in combination with the target waveguide device. The devices and systems are useful in the analysis of highly multiplexed optical reactions in large numbers at high densities, including biochemical reactions, such as nucleic acid sequencing reactions. The devices provide for the efficient coupling of optical excitation energy from an optical source to the optical reactions. Optical signals emitted from the reactions can thus be measured with high sensitivity and discrimination. The devices and systems are well suited for miniaturization and high throughput.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: November 26, 2019
    Assignee: Pacific Biosciences of California, Inc.
    Inventors: Paul Lundquist, Mark McDonald, Aaron Rulison
  • Patent number: 10425707
    Abstract: A network system for a data center is described in which a switch fabric provides full mesh interconnectivity such that any servers may communicate packet data to any other of the servers using any of a number of parallel data paths. Moreover, according to the techniques described herein, edge-positioned access nodes, optical permutation devices and core switches of the switch fabric may be configured and arranged in a way such that the parallel data paths provide single L2/L3hop, full mesh interconnections between any pairwise combination of the access nodes, even in massive data centers having tens of thousands of servers. The plurality of optical permutation devices permute communications across the optical ports based on wavelength so as to provide full-mesh optical connectivity between edge-facing ports and core-facing ports without optical interference.
    Type: Grant
    Filed: March 28, 2018
    Date of Patent: September 24, 2019
    Assignee: FUNGIBLE, INC.
    Inventors: Pradeep Sindhu, Satish Deo, Deepak Goel, Sunil Mekad
  • Patent number: 10422960
    Abstract: This application discloses an optical switch and an optical switching system. The optical switch includes a first waveguide, a second waveguide, and a movable waveguide, the first waveguide and the second waveguide are immovable relative to a substrate and are located in a plane, and an optical coupling relationship exists between the first waveguide and the second waveguide; the movable waveguide is movable relative to the substrate, and the movable waveguide is optically coupled to an input section or an output section of the first waveguide; when the movable waveguide is located at a first location, the movable waveguide is optically decoupled from the first waveguide, and the optical switch is in a through state; and when the movable waveguide is located at a second location, the movable waveguide is optically coupled to the input section or the output section, and the optical switch is in a drop state.
    Type: Grant
    Filed: January 18, 2019
    Date of Patent: September 24, 2019
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Jiejiang Xing, Xin Tu, Ming Li
  • Patent number: 10317640
    Abstract: An indexing terminal arrangement includes a terminal housing that receives an input cable; an optical power splitter disposed within the interior of the terminal housing; a first multi-fiber optical adapter coupled to the terminal housing; a first single-fiber optical adapter coupled to the terminal housing; and a pass-through multi-fiber optical adapter coupled to the terminal housing. Split optical signals are provided to the first multi-fiber optical adapter and the first single-fiber optical adapter. Unsplit and indexed optical signals are provided to the pass-through optical adapter.
    Type: Grant
    Filed: February 23, 2016
    Date of Patent: June 11, 2019
    Assignee: CommScope Technologies LLC
    Inventor: Thomas Marcouiller
  • Patent number: 10291971
    Abstract: An optical cross-connect node includes a first optical switching switch, a second optical switching switch, a wave-dropping wavelength switching switch, a wave-adding wavelength switching switch, and a pass-through dimension switching switch. The first optical switching switch receives an optical signal, where the optical signal includes a first optical signal and/or a second optical signal. The first optical switching switch sends the first optical signal to the wave-dropping wavelength switching switch. The first optical switching switch sends the second optical signal to the pass-through dimension switching switch. The wave-dropping wavelength switching switch performs wavelength switching on the first optical signal. The wave-adding wavelength switching switch performs wavelength switching on a third optical signal generated locally and sends it to the second optical switching switch.
    Type: Grant
    Filed: October 10, 2017
    Date of Patent: May 14, 2019
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Dawei Wang, Yi Qian
  • Patent number: 10264331
    Abstract: Disclosed is a method device assembly and system for facilitating the interconnection of communication bearing cables connected cable connectors. An interconnect-point support structure comprising two or more cable connector slots, wherein in each of the two or more slots is adapted to host a cable connector attached to a respective cable. A mechanical arm functionally associated with the interconnect-point support structure is adapted to release a cable connector, mobilize and mate it to another connector.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: April 16, 2019
    Assignee: XENOPTICS IP HOLDINGS PTY LTD.
    Inventors: Zohar Avrahami, Joseph Arol
  • Patent number: 10248570
    Abstract: A method for predicting a way of a set associative shadow cache is disclosed. As a part of a method, a request to fetch a first far taken branch instruction of a first cache line from an instruction cache is received, and responsive to a hit in the instruction cache, a predicted way is selected from a way array using a way that corresponds to the hit in the instruction cache. A second cache line is selected from a shadow cache using the predicted way and the first cache line and the second cache line are forwarded in the same clock cycle.
    Type: Grant
    Filed: January 4, 2018
    Date of Patent: April 2, 2019
    Assignee: Intel Corporation
    Inventors: Mohammad Abdallah, Ravishankar Rao, Karthikeyan Avudaiyappan
  • Patent number: 10230476
    Abstract: A Method and Apparatus for Flexible Coherent and Scale-out Computing Architecture have been disclosed. In one implementation a plurality of integrated photonics are used to effect communications.
    Type: Grant
    Filed: February 22, 2017
    Date of Patent: March 12, 2019
    Assignee: INTEGRATED DEVICE TECHNOLOGY, INC.
    Inventor: Mohammad Shahanshah Akhter
  • Patent number: 10187107
    Abstract: An electrochromic (EC) switch is disclosed and claimed. The EC switch includes an EC region and an electrolyte region separated by a dielectric region on a ground plane. A microstrip configured to transmit an RF signal is adjacent to and in electrical contact with the EC region. A conductive pad is adjacent to the electrolyte region and a bias line couples the microstrip to the electrolyte region. Voltages applied between the ground plane and the conductive pad and between the conductive pad and the bias line switch the microstrip. The EC switch may be incorporated within a wide variety of RF devices, for example, attenuators, phase shifters and antennas.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: January 22, 2019
    Assignee: Nokia Solutions and Networks Oy
    Inventors: Senad Bulja, Rose Kopf
  • Patent number: 10162121
    Abstract: A method and switch are provided for reconfigurable optical space switch. The method includes receiving a control signal, from a controller, to configure a path through the reconfigurable optical space switch. The method also includes applying a voltage to one or more direction changing devices at each intersection between each of the east-west optical waveguides and each of the north-south optical waveguides to form the path through the reconfigurable optical space switch. The method additionally includes receiving an optical signal in one of a plurality of passive waveguides at a beginning of the path, including the plurality of east-west optical waveguides and the plurality of north-south optical waveguides. The method further includes outputting the optical signal out on of the plurality of passive waveguides at an end of the path.
    Type: Grant
    Filed: February 28, 2018
    Date of Patent: December 25, 2018
    Assignee: NEC Corporation
    Inventors: Ivan B. Djordjevic, Shaoliang Zhang, Ting Wang
  • Patent number: 10088634
    Abstract: One example includes an optical port-shuffling module. The module includes a plurality of inputs to receive a respective plurality of optical signals. The module also includes a plurality of outputs to provide the respective plurality of optical signals from the optical port-shuffling module. The module further includes a plurality of total-internal-reflection (TIR) mirrors arranged in optical paths of at least a portion of the plurality of optical signals to reflect the at least a portion of the plurality of optical signals to at least a portion of the plurality of outputs to shuffle the plurality of optical signals between the plurality of inputs and the plurality of outputs.
    Type: Grant
    Filed: October 23, 2014
    Date of Patent: October 2, 2018
    Assignee: Hewlett Packard Enterprise Development LP
    Inventors: Jason Pelc, Charles M Santori, Marco Fiorentino, Sr., Raymond G Beausoleil, Terrel L Morris
  • Patent number: 10062115
    Abstract: A variety of embodiments for hardware-accelerating the processing of financial market depth data are disclosed. A coprocessor, which may be resident in a ticker plant, can be configured to update order books based on financial market depth data at extremely low latency. Such a coprocessor can also be configured to enrich a stream of limit order events pertaining to financial instruments with data from a plurality of updated order books.
    Type: Grant
    Filed: June 26, 2014
    Date of Patent: August 28, 2018
    Assignee: IP Reservoir, LLC
    Inventors: David E. Taylor, Scott Parsons, Jeremy Walter Whatley, Richard Bradley, Kwame Gyang, Michael DeWulf
  • Patent number: 10057665
    Abstract: Methods and systems for bias control in an optical switch fabric include monitoring optical power at outputs of a plurality of switch elements in an N×N switch fabric that has N inputs, N outputs, and M?2 stages. A bias control of a first of the plurality of switch elements is adjusted. It is determined whether the optical power at the outputs of the first switch element after bias control adjustment conform more closely to a predetermined criterion relative to the monitored optical power at the outputs of the first switch element prior to adjustment. The adjusting and determining steps are repeated for each of the remainder of the plurality of switch elements.
    Type: Grant
    Filed: August 29, 2016
    Date of Patent: August 21, 2018
    Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
    Inventors: Nicolas Dupuis, Daniel M. Kuchta, Benjamin G. Lee, Alexander Rylyakov, Clint L. Schow
  • Patent number: 10048445
    Abstract: A multicast exchange optical switch includes an input port device including M input ports, an output port device including N output ports, a diffractive beam splitter, an optical focusing component, and a 1×N array of reflective devices. The diffractive beam splitter diffracts each input signal beam from the input ports into at least N directions. The optical focusing component includes a first focusing lens and a second focusing lens. The first focusing lens focuses sub-beams from the respective input ports along the Y-axis direction having the same diffraction order. The second focusing lens focuses on the X-axis direction sub-beams from the same input port having different diffraction orders. The 1×N array of reflective devices is provided at the focal plane of the optical focusing component and each reflective device reflects a sub-beam from any one of the input ports to any one of the output ports.
    Type: Grant
    Filed: December 18, 2014
    Date of Patent: August 14, 2018
    Assignee: Accelink Technologies Co., Ltd.
    Inventors: Qianggao Hu, Liping Sun, Bo Zhang, Leilei Hu, Liu Yang, Yuan Zhang, Fei Liang
  • Patent number: 10042122
    Abstract: This invention discloses patch-panel systems for organized configuration management of large numbers of fiber optic interconnection strands, wherein each strand transmits high bandwidth signals between devices. In particular, a system for the programmable interconnection of large numbers of optical fiber strands is provided, whereby strands connecting a two-dimensional array of connectors are mapped in an ordered and rule based fashion into a one-dimensional array with substantially straight lines strands there between. The braid of fiber optic strands is partitioned into multiple independent, non-interfering zones or subbraids. The separation into subbraids provides spatial clearance for one or more robotic grippers to enter the free volume substantially adjacent to the two-dimensional array of connectors and to mechanically reconfigure one or more optical fiber strands without interrupting or entangling other fiber optic strands.
    Type: Grant
    Filed: July 28, 2016
    Date of Patent: August 7, 2018
    Assignee: Telescent Inc.
    Inventor: Anthony Stephen Kewitsch
  • Patent number: 10009669
    Abstract: An optical transmitter includes an optical modulator configured to modulate an optical signal, a dual-stage space switch configured to receive, as an input, the modulated optical signal from the optical modulator, and output ports configured to control light outputs based on an operation of the dual-stage space switch.
    Type: Grant
    Filed: March 27, 2017
    Date of Patent: June 26, 2018
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sanghwa Yoo, Joon Ki Lee
  • Patent number: 9967033
    Abstract: 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.
    Type: Grant
    Filed: August 11, 2016
    Date of Patent: May 8, 2018
    Assignee: Futurewei Technologies, Inc.
    Inventors: Ning Cheng, Frank J. Effenberger
  • Patent number: 9946023
    Abstract: An optical attenuator and/or optical terminator is provided. The device includes an optical channel having two regions with different optical properties, such as an undoped silicon region which is less optically absorptive and a doped silicon region which is more optically absorptive. Other materials may also be used. A facet at the interface between the two regions is oriented at a non-perpendicular angle relative to a longitudinal axis of the channel. The angle can be configured to mitigate back reflection. Multiple facets may be included between different pairs of regions. The device may further include curved and/or tapers to further facilitate attenuation and/or optical termination.
    Type: Grant
    Filed: August 5, 2015
    Date of Patent: April 17, 2018
    Assignee: Huawei Technologies Co., Ltd.
    Inventors: Patrick Dumais, Dritan Celo
  • Patent number: 9897755
    Abstract: An optical waveguide device includes first and second branching devices and first to fourth distribution optical waveguides that are formed on an optical waveguide substrate including a latticed dummy pattern of a predetermined pitch and that are arranged, in a region where the dummy pattern is removed, so as to be separated from the dummy pattern, and an interval between the first and second distribution optical waveguides at an output point of the first branching device is equal to an interval between the third and fourth distribution optical waveguides at an output point of the second branching device, and a distance between light propagation centers of the first and second branching devices is an integer multiple of the pitch, and at a point where a distance between neighboring distribution optical waveguides becomes maximum, the distance between the neighboring distribution optical waveguides is an integer multiple of the pitch.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: February 20, 2018
    Assignee: NEC CORPORATION
    Inventor: Morio Takahashi
  • Patent number: 9898412
    Abstract: A method for predicting a way of a set associative shadow cache is disclosed. As a part of a method, a request to fetch a first far taken branch instruction of a first cache line from an instruction cache is received, and responsive to a hit in the instruction cache, a predicted way is selected from a way array using a way that corresponds to the hit in the instruction cache. A second cache line is selected from a shadow cache using the predicted way and the first cache line and the second cache line are forwarded in the same clock cycle.
    Type: Grant
    Filed: September 6, 2016
    Date of Patent: February 20, 2018
    Assignee: Intel Corporation
    Inventors: Mohammad Abdallah, Ravishankar Rao, Karthikeyan Avudaiyappan
  • Patent number: 9891425
    Abstract: An optical filter device may include an optical waveguide having an input and an output, and a plurality of first optical resonators optically coupled to the optical waveguide along a length thereof between the input and the output. The optical filter device may further include at least one second optical resonator optically coupled to the plurality of first optical resonators opposite the optical waveguide.
    Type: Grant
    Filed: June 20, 2016
    Date of Patent: February 13, 2018
    Assignee: HARRIS CORPORATION
    Inventors: Arthur C. Paolella, Erin K. Sharma, Charles F. Middleton, Evan L. Atwood, Stephen Rego
  • Patent number: 9881567
    Abstract: A method is provided for reducing flicker arising in pixels along an axis of a liquid-crystal based array such as a LCoS array. The pixels along the axis exhibit a common gray scale level. In accordance with the method, a plurality of digital data command sequences are selected that each drive a pixel at the common gray scale level. A first of the plurality of digital data command sequences is applied to a first pixel along the axis. A second of the plurality of digital data command sequences is applied to a second pixel along the axis. The second pixel is adjacent to the first pixel. The first and second digital command sequences give rise to voltages being applied to the two pixels which have frequency components that are opposite in phase and equal in magnitude.
    Type: Grant
    Filed: April 14, 2015
    Date of Patent: January 30, 2018
    Assignee: NISTICA, INC.
    Inventor: Jefferson L. Wagener
  • Patent number: 9874698
    Abstract: A tunable PLC optical filter having sequentially connected thermally tunable Mach-Zehnder (MZ) interferometers is described. The cascade of MZ interferometers, each having a free spectral ranges matching ITU frequency grid spacing, are tuned so as to have a common passband centered on the frequency of the signal being selected, while having at least one of the stopbands centered on any other ITU frequency. Any other optical channel that may be present at any other ITU frequency is suppressed as a result. Another MZ interferometer in series with the cascade of interferometers including an asymmetric or variable coupler, is tuned to have low transmission at the center frequency of the selected optical channel.
    Type: Grant
    Filed: May 11, 2016
    Date of Patent: January 23, 2018
    Assignee: Lumentum Operations LLC
    Inventors: Barthelemy Fondeur, Jinxi Shen, Leonid Frenkel, Yimin Hua, David R. Walker, Yu Zhang, Vlatko Milinkovic
  • Patent number: 9843396
    Abstract: An optical transmitter includes an optical modulator that is driven by a driving signal, an acquisition part, and a controller. The acquisition part obtains a relationship between a fluctuation of a parameter to adjust the driving signal and a fluctuation of a state of output light from the optical modulator due to the fluctuation of the parameter. The controller controls an amplitude of the driving signal on the basis of the obtained relationship.
    Type: Grant
    Filed: October 7, 2015
    Date of Patent: December 12, 2017
    Assignee: FUJITSU LIMITED
    Inventor: Yuichi Akiyama
  • Patent number: 9837723
    Abstract: A configurable deflection system for an incident microwave frequency beam exhibiting a wavelength contained in a band of wavelengths corresponding to the microwave frequencies, comprising: a first and a second diffractive dielectric component suitable for each performing a rotation about a rotation axis Z, the deflection system being suitable for generating a microwave frequency beam by diffraction of the incident microwave frequency beam on the first and second components, the microwave frequency beam being oriented according to an angle that is a function of the angular positioning between the first and said second diffractive components, the first and second components respectively exhibiting a first and second periodic structure of first and second periods according to a first and second axis, the first and second structures respectively comprising a plurality of first and second primary microstructures formed respectively on a first and second substrate of first and second substrate refractive indices.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: December 5, 2017
    Assignee: THALES
    Inventors: Mane-Si Laure Lee-Bouhours, Antoine Brus, Brigitte Loiseaux, Thierry Dousset, Christian Renard
  • Patent number: 9813787
    Abstract: Embodiments of the present invention relate to the field of information technologies and disclose a link determining method, apparatus, and system for an optical packet switching system, which can reduce optical packet switching costs. The method includes: first, a control manager generates reference optical label information and an enabling signal, and sends the reference optical label information and the enabling signal to a link determining device; then, when the enabling signal is active, the link determining device determines, according to parsed-out actual optical label information and the received reference optical label information, whether an alarm signal is generated, and if it is determined that the alarm signal is generated, sends the alarm signal to the control manager; and finally, the control manager further determines, according to the received alarm signal, whether a link corresponding to the alarm signal is abnormal.
    Type: Grant
    Filed: October 14, 2016
    Date of Patent: November 7, 2017
    Assignee: HUAWEI TECHNOLOGIES CO., LTD.
    Inventors: Xiaoling Yang, Huixiao Ma
  • Patent number: 9804327
    Abstract: Provided is a phase error compensating apparatus. The phase error compensating apparatus may include a waveguide array disposed between a first free propagation region and a second free propagation region and configured to allow a light signal passed through the first free propagation region to move toward the second free propagation region, in which a length of each of the waveguides included in the waveguide array may be adjusted to compensate for a phase error of light signals passed through the waveguides.
    Type: Grant
    Filed: March 22, 2017
    Date of Patent: October 31, 2017
    Assignee: ELECTRONICS AND TELECOMUNICATIONS RESEARCH INSTITUTE
    Inventors: Heuk Park, Sae Kyoung Kang, Hwan Seok Chung
  • Patent number: 9794016
    Abstract: In one embodiment, an optical system for processing space-multiplexed optical signals includes an input fiber that propagates multiple spatially-separated optical signals, a photonic signal processor that receives the multiple spatially-separated optical signals and simultaneously processes those signals, and an output fiber that receives at least one of the processed signals.
    Type: Grant
    Filed: October 5, 2012
    Date of Patent: October 17, 2017
    Assignee: University of Central Florida Research Foundation, Inc.
    Inventors: Guifang Li, Ibrahim T. Ozdur
  • Patent number: 9788089
    Abstract: An optical add-drop apparatus dropping a signal in input optical fibers in an optical cross-connect apparatus or adding a signal into output optical fibers from the cross-connect apparatus, optical cross-connect portions of the cross-connect apparatus connected such that a cross-connect portion internal connection output port is directly connected to an internal connection input port of another cross-connect portion and is indirectly connected via the other cross-connect portion to an internal connection output port of a further cross-connect portion, the add-drop apparatus having: photocouplers connected to part or all of the input fibers connected to each cross-connect portion; and drop signal receiving apparatuses each having optical switches each receiving and alternately selecting a signal output from photocouplers connected to respective different cross-connect portions of the cross-connect portions out of the photocouplers, the drop signal receiving apparatuses selecting a signal of a wavelength for ea
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: October 10, 2017
    Assignee: JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Ken-ichi Sato, Hiroshi Hasegawa, Hiroto Ishida
  • Patent number: 9780903
    Abstract: An optical wavelength demultiplexer includes a wavelength demultiplexing device, a first wavelength filter and a first- and second-stage wavelength sub-filters. The wavelength demultiplexing device demultiplexes an input light into a first wavelength band including wavelengths ?1 and ?2 in the vicinity of 1310 nm and a second wavelength band including a wavelength ?3 of 1490 nm and a wavelength ?4 of 1550 nm to output. The first-stage wavelength sub-filter removes the wavelength ?2 longer than 1310 nm from the second wavelength band and transmits the wavelength ?3 of 1490 nm. The second-stage wavelength sub-filter removes the wavelength ?4 of 1550 nm and outputs the wavelength ?3 of 1490 nm, which is the remainder of the selected lights, with a sufficient wavelength spectral purity.
    Type: Grant
    Filed: January 27, 2015
    Date of Patent: October 3, 2017
    Assignee: Oki Electric Industry Co., Ltd.
    Inventor: Hideaki Okayama
  • Patent number: 9749081
    Abstract: Provided herein is a wavelength/bandwidth tunable optical filter capable of flexibly tuning a wavelength and bandwidth, the wavelength/bandwidth tunable optical filter including an optical circulator configured to receive a WDM (Wavelength-Division-Multiplexing) optical signal from an optical cable; and a plurality of wavelength-tunable optical filters configured to receive the WDM optical signal via the optical circulator, wherein the plurality of wavelength-tunable optical filters reflect wavelengths of different bandwidths from one another.
    Type: Grant
    Filed: February 1, 2016
    Date of Patent: August 29, 2017
    Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventor: Jong Sool Jeong
  • Patent number: 9720176
    Abstract: The present invention provides a low-loss high-repetition-rate pulsed laser modulator comprising: a 2*2, 1:1 coupler; a light delay module; a 1*2, 1:1 coupler. The present invention can modulate a low-repetition-rate pulsed laser to be a high-repetition-rate pulsed laser. The basic principle is: one beam of low-repetition-rate pulsed laser can be divided into two beams with the same light intensity by a 1*2, 1:1 coupler; control the two beams of light to have an optical path difference so that when they are coupled into a 2*2, 1:1 coupler, a double pulse repetition rate can be obtained; In the same way, when the two beams of light from former 2*2, 1:1 coupler, with another different optical path difference are coupled into the next 2*2, 1:1 coupler, a double pulse repetition rate can be obtained again; when we obtain the repetition rate we need, a 1*2, 1:1 coupler instead is connected to couple the two beams of light into one beam with a double repetition rate.
    Type: Grant
    Filed: January 20, 2016
    Date of Patent: August 1, 2017
    Assignee: TIANJIN OPTERA LASER TECHNOLOGY CO., LTD.
    Inventors: Wei Shi, Zhenhua Yu, Xinzheng Dong
  • Patent number: 9723387
    Abstract: To provide an optical signal processing device that can collect light from an input waveguide to form a beam array having a small diameter. The optical signal processing device includes input waveguides 302a to 302c, an array waveguide 305 and a slab waveguide 304 that is connected to a first arc 304a having the single point C as a center and input waveguides 302a to 302c and that is connected to a second arc 404b having the single point C as a center and an array waveguide 305.
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: August 1, 2017
    Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
    Inventors: Kenya Suzuki, Kazunori Seno, Naoki Ooba, Tetsuo Takahashi, Toshio Watanabe, Takeshi Kawai, Mitsunori Fukutoku, Yuzo Ishii, Koichi Hadama, Yuichi Higuchi
  • Patent number: 9703049
    Abstract: An optical fiber core butting apparatus comprises a butting panel (1) with multiple butting devices including butting holes (11), optical fiber core butting connectors and mechanical hands (3); the optical fiber core butting connectors comprise a wire-line connector (21) and a cord-line connector (22); the wire-line connector (21) comprises a first slide bar (211), a first wire-line core connector (212) and a second wire-line core connector (213), and the input terminals and the output terminals of the first and second wire-line core connectors (212, 213) are both connected by connecting fibers; the cord-line connector (22) comprises a second slide bar (221), a first cord-line core connector (222) and a second cord-line core connector (223), and the first and second cord-line connector (222, 223) are connected by a connecting fiber; the mechanical hands (3) are used for holding the core connectors and driving the core connectors to move.
    Type: Grant
    Filed: November 28, 2013
    Date of Patent: July 11, 2017
    Assignees: State Grid Corporation of China (SGCC), State Grid Ningbo Power Supply Company
    Inventors: Xuefeng Fan, Jun Qiu, Xiaozhong Xu, Hongsheng Yu, Chengzhi Zhu, Zhiqiang Xu, Yize Tang, Peng Li, Yunhui Fang, Liwei Zhang
  • Patent number: 9647790
    Abstract: A reconfigurable optical switch apparatus comprising m input ports, m output ports, k add ports, k drop ports and a switch matrix comprising m×k wavelength selective optical switches arranged in m rows and k columns. Each switch comprises first, second, third and fourth ports. The columns are grouped in adjacent pairs, in each pair a first column being connected to a respective drop port on a first side of the switch matrix and each wavelength selective switch in said first column having the fourth port arranged on said first side and a second column, adjacent the first column, being connected to a respective drop port on a second side, opposite the first side, of the switch matrix and each wavelength selective switch in said second column having the fourth port arranged on said second side.
    Type: Grant
    Filed: January 15, 2013
    Date of Patent: May 9, 2017
    Assignee: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)
    Inventors: Antonio D'Errico, Francesco Testa
  • Patent number: 9632391
    Abstract: An optical device in which crosstalk due to scattering is reduced includes an optical port array having at least one optical input for receiving an optical beam and at least one optical output. The input and outputs extend along a common axis. A dispersion element receives the optical beam from the optical input and spatially separates the optical beam into a plurality of wavelength components. A focusing element focuses the plurality of wavelength components and a programmable optical phase modulator receives the focused plurality of wavelength components. The modulator is configured to steer the wavelength components to a selected one of the optical outputs. The programmable optical phase modulator is oriented with respect to the optical port array so that an axis along which the optical beam is steered is non-coincident with the common axis along which the input and outputs extend.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: April 25, 2017
    Assignee: Nistica, Inc.
    Inventors: Jefferson L. Wagener, Takaaki Ishikawa
  • Patent number: 9614345
    Abstract: An arrayed optical amplifier includes: at least one first amplifier including a first excitation light source controlled to a first temperature; at least one second amplifier including a second excitation light source controlled to a second temperature different from the first temperature; and a control circuit coupled to the at least one first amplifier and the at least one second amplifiers.
    Type: Grant
    Filed: November 30, 2015
    Date of Patent: April 4, 2017
    Assignee: FUJITSU LIMITED
    Inventor: Toshihiro Ohtani
  • Patent number: 9601903
    Abstract: A horizontal cavity surface emitting laser device includes an active layer configured to generate light to be emitted in one direction along the one surface of a semiconductor substrate and in another direction opposite to the one direction. The device also includes a rear distributed Bragg reflector unit configured to reflect the light. The rear distributed Bragg reflector unit includes a waveguide layer configured to guide light and a distributed Bragg reflector configured to reflect the light in the waveguide layer. The device further includes an optical component configured to guide, in a direction different from the one direction and the other direction, the light emitted from an end of the rear distributed Bragg reflector unit in the one direction. The device further includes a front reflecting mirror configured to reflect the light emitted from the active layer in the other direction toward another surface side of the semiconductor substrate.
    Type: Grant
    Filed: January 28, 2015
    Date of Patent: March 21, 2017
    Assignee: Oclaro Japan, Inc.
    Inventors: Koichiro Adachi, Takanori Suzuki