Patents Examined by Pranesh K Barua
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Patent number: 11982884Abstract: There is provided an optical signal processing device that generates a mask function in an optical domain to enable high-speed RC processing. For light emitted from a laser light source, an optical modulator modulates at a modulation period at least one of the intensity and phase values of the optical electric field. Thereby, the light emitted from the laser light source becomes an input signal. The input signal is entered into an optical FIR filter unit. For the input signal, the term corresponding to the mask function is multiplied at the optical FIR filter unit and weighted. Thereby, the input signal is converted into an input signal modulated. The modulated input signal enters via an optical coupler, an optical circulation circuit which is loaded with a variable attenuator and a nonlinear response element. The circulating optical signal is branched into two by an optical coupler. One branched light is converted into an intermediate signal at an optical receiver.Type: GrantFiled: February 26, 2019Date of Patent: May 14, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Mitsumasa Nakajima, Toshikazu Hashimoto
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Patent number: 11979186Abstract: Disclosed herein are methods and systems for computing a launch power for an optical node by collecting data for an optical network segment and inputting the collected data and first power spectral density values into a machine learning model which are used to compute a first non-linear interference value. A first generalized-optical signal-to-noise ratio value is computed using the computed first non-linear interference value and amplified spontaneous emission values. At least one second generalized-optical signal-to-noise ratio value is computed using at least one second non-linear interference value, computed using at least one second power spectral density values, and the amplified spontaneous emission values. A highest generalized-optical signal-to-noise ratio value is determined by comparing the first generalized-optical signal-to-noise ratio value and the at least one second generalized-optical signal-to-noise ratio value.Type: GrantFiled: September 1, 2022Date of Patent: May 7, 2024Assignee: Infinera CorporationInventors: Ankur Neog, Zhong Pan, Baranidhar Ramanathan
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Patent number: 11979194Abstract: A large-area, waveguide-based, high-speed ultraviolet and visible light photodetector system for optical wireless communication includes a substrate; plural, parallel, waveguides formed directly on the substrate and including a high quantum-yield wavelength-converting material of semiconductor nature; an optical coupling system optically connected to each one of the plural, parallel, waveguides; and a photodetector optically connected to the optical coupling system and configured to detect an outgoing light. The wavelength-converting material converts a first wavelength of an incoming light at high-speed, received by the plural, parallel, waveguides, into a second wavelength of the outgoing light. The first wavelength is different from the second wavelength, and the first and second wavelengths are between 200 and 800 nm.Type: GrantFiled: February 19, 2020Date of Patent: May 7, 2024Assignee: KING ABDULLAH UNIVERSITY OF SCIENCE AND TECHNOLOGYInventors: Boon Siew Ooi, Chun Hong Kang, Tien Khee Ng
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Patent number: 11967989Abstract: An optical communications transmitter for use in free space communication from the transmitter to a receiver, the transmitter including a light input and an optical fiber array for directing the light input. The optical communications transmitter further includes an optical phased array for receiving the light input from the optical fiber array and transmitting a light output, the optical phased array being configured for modifying a relative phase of the light input such that the light output exhibits a predetermined far-field intensity pattern.Type: GrantFiled: December 13, 2021Date of Patent: April 23, 2024Assignee: BridgeComm, Inc.Inventors: Paul Searcy, Barry A. Matsumori
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Patent number: 11956070Abstract: An object of the present invention is to provide an optical transmission system capable of controlling a transmission capacity and a signal processing load of a MIMO equalizer, without depending on the number of propagation modes of the optical fiber.Type: GrantFiled: September 17, 2019Date of Patent: April 9, 2024Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Taiji Sakamoto, Masaki Wada, Takashi Yamamoto, Kazuhide Nakajima
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Patent number: 11937029Abstract: An optical transmitter can generate probabilistically shaped quadrature amplitude modulation (PS-QAM) signaling for transmission over a fiber to a destination without optical amplification. The single fiber can transmit the PS-QAM signaling using dense wavelength division multiplexing having a relatively large number of channels that are closely spaced. A coherent receiver can receive the PS-QAM signaling for decoding without implementing chromatic dispersion compensation.Type: GrantFiled: August 3, 2021Date of Patent: March 19, 2024Assignee: Juniper Networks, Inc.Inventors: Zhen Qu, Xiao Han, Yang Yue
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Patent number: 11934050Abstract: A method of controlling an optical modulator having a first child modulator, a second child modulator, and a parent modulator includes applying a first bias, on which a first dither signal with frequency f1 is superimposed, to the first child modulator, applying a second bias, on which a second dither signal with frequency f2 different from f1 is superimposed, to the second child modulator, applying a third bias, on which a third dither signal with frequency f3 different from both f1 and f2 is superimposed, to the parent modulator. A first error component having the f1 frequency, and a second error component having a beat frequency of f2 and f3 frequencies are detected from the output light from the optical modulator, and a first error signal is generated from the first error component and the second error component to adjust the first bias.Type: GrantFiled: February 17, 2022Date of Patent: March 19, 2024Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventor: Masaaki Okamoto
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Patent number: 11937030Abstract: An optical link system for computation, preferably including a photonics substrate and a plurality of electronics modules, such as processors, memory controllers, and/or switches, which are preferably bonded to the photonics substrate. A photonics substrate, preferably including a plurality of optical links including waveguides and optical transducers. A method for optical link system operation, preferably including operating electronics modules and using optical links, optionally in cooperation with electronics modules such as switches, to transfer information between the electronics modules.Type: GrantFiled: September 27, 2022Date of Patent: March 19, 2024Assignee: Luminous Computing, Inc.Inventors: Patrick Gallagher, Thomas W. Baehr-Jones, Michael Gao, Mitchell A. Nahmias
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Patent number: 11916342Abstract: A system to couple a controller to a roadside aerial lighting fixture includes a primary male connector integrated with the controller and a primary female connector integrated with the roadside aerial lighting fixture. The primary male and female connectors are compliant with a roadway area lighting standard promoted by a standards body. The primary male connector protrudes from a first substantially planar surface of the controller. The primary female connector is recessed within a second substantially planar surface of the roadside aerial lighting fixture. A controller-side high speed communications data element is integrated with the primary male connector, and a fixture-side high speed communications data element is integrated with the primary female connector.Type: GrantFiled: November 20, 2020Date of Patent: February 27, 2024Assignee: Ubicquia, Inc.Inventors: Ronald B. Zimmerman, III, Ian B. Aaron, Bradford Brian Hutson, Jeffrey T. Root
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Patent number: 11916596Abstract: A distributed radio access network (RAN) is provided. A selected wireless transceiver node(s) in a selected coverage cell receives a radio frequency (RF) test signal(s). The selected wireless transceiver node(s) determines an effective gain value based on a predefined characteristic of the RF test signal(s). The selected wireless transceiver node(s) communicates the effective gain value and other related parameters to a server apparatus in the distributed RAN. The server apparatus determines a common gain value for the selected wireless transceiver node(s) in the selected coverage cell based on the parameters. Accordingly, the selected wireless transceiver node(s) operates based on the common gain value.Type: GrantFiled: August 5, 2021Date of Patent: February 27, 2024Assignee: CORNING OPTICAL COMMUNICATIONS LLCInventors: Kalle Ahmavaara, Shirish Nagaraj, Deepak Pengoria
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Patent number: 11909443Abstract: An ROF communication remote machine and an ROF system are disclosed. The machine comprises a first packaging module and a second packaging module. The first packaging module comprises a first branch and a second branch. The first branch is used for converting a downlink optical signal, and sending the downlink electrical signal to the second packaging module. The second branch receives the downlink electrical signal, converts the downlink electrical signal into a downlink optical signal, sends the downlink optical signal to the local machine, receives an uplink electrical signal, and sends the uplink electrical signal to the local machine. The second packaging module is used for amplifying the power of the downlink electrical signal, filtering the downlink electrical signal, then feeding back the downlink electrical signal to another component, receiving the uplink electrical signal, and sending the uplink electrical signal to the second port.Type: GrantFiled: December 11, 2019Date of Patent: February 20, 2024Assignee: Comba Network Systems Company LimitedInventors: Weidong Zhong, Shangkun Wu, Yangyang Li, Li Fan
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Patent number: 11901936Abstract: A network management system can be configured to identify routes for satisfying a set of demands on an optical communication network using layer graph(s). The layer graph edges can have edge scores that indicate a cost of the edge. The network management system can generate the layer graph(s) using a network graph that represents the optical communication network and an associated sets of available frequency slots. The network management system can iteratively identify candidate path(s) on the layer graph(s) that correspond to each of the demands and determine a cost for each candidate path using the edge scores. In each iteration, the network management system can select the lowest cost candidate path, update the layer graph(s) based on this selection, and update the candidate paths for the remaining demands as needed. The network management system can similarly generate restoration paths for each of the demands.Type: GrantFiled: July 17, 2023Date of Patent: February 13, 2024Assignee: ECI Telecom Ltd.Inventors: Inbal Hecht, Efraim Gelman, Shirel Ezra, Ziv Shem-Tov, Hayim Porat
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Patent number: 11901646Abstract: A sensing system. In some embodiments, the system includes a first imaging radio frequency receiver, a second imaging radio frequency receiver, a first optical beam combiner, a first imaging optical receiver, a second optical beam combiner, and an optical detector array. The first optical beam combiner may be configured to combine optical signals of the imaging radio frequency receivers. The second optical beam combiner may be configured to combine the optical signals of the imaging radio frequency receivers, and the optical signal of the first imaging optical receiver.Type: GrantFiled: September 8, 2022Date of Patent: February 13, 2024Assignee: RAYTHEON COMPANYInventors: Gerald P. Uyeno, Sean D. Keller, Benn Gleason
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Patent number: 11902722Abstract: Delivering information according to a recipient's location by modulating an optical carrier according to a data set, transmitting the optical carrier in a first direction, altering the path of the carrier wave according to an optical carrier wavelength, receiving recipient location information, and altering the optical carrier wavelength or optical carrier path according to the recipient location information.Type: GrantFiled: July 27, 2020Date of Patent: February 13, 2024Assignee: International Business Machines CorporationInventor: Sarbajit K. Rakshit
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Patent number: 11888537Abstract: A fiber link system, method and device for masking signals on a fiber link system. The system includes sending a desired sequence of information in the form of a true signal that is typically intended to be transferred between legitimate users at both ends of a link. Sending chaff signals, or subterfuge signals, alongside the true signal to mask such legitimate signals in the fiber cable from intruders tapping into the fiber cable.Type: GrantFiled: April 15, 2019Date of Patent: January 30, 2024Assignee: APRIORI NETWORK SYSTEMS, LLC.Inventor: Gary M. Weiner
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Patent number: 11888523Abstract: Systems and methods to implement a USB and Thunderbolt optical signal transceiver are described. One method includes detecting presence of a USB sideband signal received over an optical communication channel and associated with a USB communication request. Responsive to the detecting, the method may determine that the USB communication request corresponds to a USB communication mode and perform a sideband negotiation. The USB communication mode may be enabled. A specified number of channels associated with the USB communication request may be determined. USB communication may be performed using the specified number of channels over the optical communication channel in the USB communication mode.Type: GrantFiled: December 9, 2021Date of Patent: January 30, 2024Assignee: WINGCOMM CO. LTD.Inventors: Jianming Yu, Zuodong Wang, Wei Mao, Yun Bai
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Patent number: 11863917Abstract: The invention relates to a switch system comprising one or more optical transceiver assemblies (14) connected to a switch ASIC (29).Type: GrantFiled: October 21, 2019Date of Patent: January 2, 2024Assignee: SICOYA GMBHInventors: Stefan Meister, Hanjo Rhee, Moritz Grehn, Sven Otte, Andrea Zanzi, Mischa Gehring
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Patent number: 11855694Abstract: An optical communication network includes a primary laser source, a first comb generator, and a first transceiver. The first comb generate a first plurality of comb tones having constant frequency spacing. The first transceiver includes a first transmitter having a secondary laser with a resonator frequency injection locked to a frequency of a single longitudinal mode corresponding to a particular comb tone of the first plurality of comb tones. The first transmitter adheres input data onto the injection locked frequency, and outputs a modulated data stream over an optical transport to a second transceiver downstream of the first transceiver. The improvement includes a second comb generator disposed downstream of, receives a seed tone from, and is phase-synchronized with, the first comb generator. The second comb generator outputs a second plurality of comb tones substantially conforming to the frequencies and frequency spacing of the first plurality of comb tones.Type: GrantFiled: November 15, 2021Date of Patent: December 26, 2023Assignee: Cable Television Laboratories, Inc.Inventors: Haipeng Zhang, Mu Xu, Junwen Zhang, Zhensheng Jia, Luis Alberto Campos
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Patent number: 11855754Abstract: Methods, systems, and apparatus for subcarrier modulation with radio frequency inphase-quadrature (IQ) modulators. A system includes a plurality of IQ modulators, each configured to receive an input electrical signal comprising an inphase signal and a quadrature signal, and each configured to modulate the inphase signal and quadrature signal based on one of a plurality of local oscillator signals to output a multiplexed signal. Each of the plurality of local oscillator signals is supplied by a respective one of a plurality of local oscillator circuits. A modulator circuit is configured to modulate a carrier optical signal from a laser having a frequency ?c based on the multiplexed signal to generate a modulated optical signal centered at frequency ?c and comprising a plurality of subcarriers. A center frequency of each of the plurality of subcarriers is offset from ?c by a frequency of said one of the plurality of local oscillator signals.Type: GrantFiled: December 30, 2019Date of Patent: December 26, 2023Assignee: Infinera CorporationInventors: Kuang-Tsan Wu, Han Henry Sun, Steven Joseph Hand, David F. Welch
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Patent number: 11848705Abstract: An optical transceiver includes a housing, a heat source accommodated in the housing, and a heat spreader. The heat spreader includes a heat transfer portion accommodated in the housing and a heat dissipation portion exposed to outside. The heat spreader is in thermal contact with the heat source, and the heat dissipation portion of the heat spreader is in proximity of an optical port of the housing.Type: GrantFiled: June 28, 2021Date of Patent: December 19, 2023Assignee: Prime World International Holdings Ltd.Inventors: Ling-An Kung, Hsuan-Chen Shiu, Guang-Kai Wu