Patents Examined by Mohammad R Sedighian
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Patent number: 11258508Abstract: A transmitter can include a laser operable to output an optical signal; a digital signal processor operable to receive data and provide a plurality of electrical signals based on the data; and a modulator operable to modulate the optical signal to provide a plurality of optical subcarriers based on the plurality of electrical signals. One of the plurality of subcarriers carries first information indicative of a first portion of the data in a first time slot and second information indicative of a second portion of the data in a second time slot. The first information is associated with a first node remote from the transmitter and the second information is associated with a second node remote from the transmitter. A receiver as well as a system also are described.Type: GrantFiled: March 4, 2020Date of Patent: February 22, 2022Assignee: Infinera CorporationInventors: Amir Jafari, Kuang-Tsan Wu, David F. Welch, Steven Joseph Hand, Mohamed Osman
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Patent number: 11258511Abstract: The present invention pertains to a system and method for operating at least one LED unit of lighting grid comprising a plurality of LED units, wherein the LED units are configured to transmit a VLC signal including a code word. A plurality of user equipment devices captures the light transmitted by the LED unit and determines parameters related to the light, such as a VLC quality parameter, flicker value, light intensity parameter and light colour parameter. Based on these parameters, a controller determines control parameters for the LED unit. As such, a feedback loop is created wherein the LED unit is controlled based on measurements with the user equipment devices.Type: GrantFiled: October 5, 2018Date of Patent: February 22, 2022Assignee: eldoLAB Holding B.V.Inventors: Marc Saes, Andy Johanna Elisabeth Otten
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Patent number: 11239909Abstract: Dynamic error-quantizer tuning systems and methods prevent misconvergence to local minima by using a dynamic quantizer circuit that controls reference voltages of three or more comparators that are independently adjusted to modify the transfer function of the dynamic quantizer circuit. A weighted sum of the comparator outputs is subtracted from the input to form an error signal in a control loop. The ratio of the reference voltages is chosen to reduce or eliminate local minima during a convergence of the control loop and is set to values that minimize a mean squared error signal with respect to discrete modulation states of the input after the convergence of the control loop is complete.Type: GrantFiled: October 23, 2020Date of Patent: February 1, 2022Assignee: Maxim Integrated Products, Inc.Inventor: Charles Razzell
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Patent number: 11233574Abstract: Real-time systems and methods prevent duplication of independent signal streams in a coherent receiver subject to source separation controlled by multiplicative coefficients under adaptive feedback control. In various embodiments, this is achieved by first obtaining a first set of coefficients associated with a first signal stream and a second set of coefficients associated with a second signal stream. In response to the sets of coefficients satisfying a condition, the first set modified into a set of coefficients that is mutually orthogonal with respect to and replaces the second set of coefficients. The resulting series of coefficient values may then be used to perform source separation of independent signal streams without duplicating independent signal streams.Type: GrantFiled: October 26, 2020Date of Patent: January 25, 2022Assignee: Maxim Integrated Products, Inc.Inventors: Charles Razzell, Edem Ibragimov
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Patent number: 11206466Abstract: 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: GrantFiled: November 13, 2019Date of Patent: December 21, 2021Assignee: Aeponyx Inc.Inventors: Francois Menard, Martin Berard, Jonathan Briere
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Patent number: 11190859Abstract: 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: GrantFiled: November 4, 2019Date of Patent: November 30, 2021Assignee: Aeponyx Inc.Inventors: Francois Menard, Martin Berard, Jonathan Briere
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Patent number: 11177887Abstract: The present disclosure is generally directed to a stepped profile for substrates that support “on board” optical subassembly arrangements. The stepped profile enables mounting TOSA modules to the substrate in a recessed orientation to reduce the overall distance between terminals of the substrate and associated components of the TOSA, e.g., RF terminals of the substrate and an LDD of the TOSA. In an embodiment, the stepped profile further simplifies mounting and optical alignment of TOSA modules by providing at least one mechanical stop to engage surfaces of the TOSA modules and limit travel by the same along one or more axis.Type: GrantFiled: January 8, 2020Date of Patent: November 16, 2021Assignee: Applied Optoelectronics, Inc.Inventors: Kai-Sheng Lin, Hang Xie, Yi Wang
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Patent number: 11171724Abstract: Light-based deciphering and transmission of information from one remote party to another in line-of-sight is disclosed. The system speeds the pace of light-based transmissions, the decoding of transmissions, and improves the accuracy of reception of the transmissions. In certain embodiments, the system sends both visual and infrared light to send different types of information to the recipient or to send information under different conditions. Exemplary embodiments disclosed herein demonstrate three exemplary systems (mechanical, LCD, and LED) that are suitable for combination with the other components of the system as disclosed herein. In certain embodiments, the system is configured to focus on the correct light (when there are other lights in view) sending the code (e.g., Morse code or On-Off Keying) and track it.Type: GrantFiled: July 3, 2018Date of Patent: November 9, 2021Assignee: Marsupial Holdinds, Inc.Inventors: William P. Parker, Jessica Lindle, Eric Gallo, Michael Strauss, Andrew Johnson
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Patent number: 11153015Abstract: A spread spectrum receiving method receives a spread spectrum signal. An optical signal frequency comb is generated. Modes of the optical signal frequency comb are modulated with a received spread spectrum signal. An optical local oscillator comb is generated that is mutually coherent with the signal frequency comb. A code word is applied to the local oscillator comb. The combs are combined and the received spread spectrum signal is detected from the combined combs.Type: GrantFiled: July 27, 2020Date of Patent: October 19, 2021Assignee: The Regents of the Unversilty of CaliforniaInventors: Daniel Esman, Vahid Ataie, Ping P. Kuo, Nikola Alic, Stojan Radic
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Patent number: 11128374Abstract: The invention relates to base stations in communication networks. In more particular the invention relates to cellular base stations such as 3G/4G and WLAN base stations. Some or all of the aforementioned advantages of the invention are accrued with a fully photonic base station (200) that powers itself with solar photons, provides radio network access and relays an optical photonic beam (220, 221, 230, 231) through air encoded with the data from radio signals of computer users and mobile phone users to the Internet and the global telecommunication network. A system engineer can build a network with the inventive base stations in a matter of days. He simply walks to the roof of houses and points the optical beams to other base stations in adjacent houses.Type: GrantFiled: December 12, 2019Date of Patent: September 21, 2021Inventor: Mikko Vaananen
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Patent number: 11108463Abstract: The disclosed systems, structures, and methods are directed to an optical communication system. The optical communication system comprising an optical node configured to receive a light signal, in which the light signal is received from a first optical path and a second optical path, and the optical node is further configured to determine a change in state of polarization (SOP) of the light signal received from the first optical path and the second optical path, a processing unit configured to determine if at least a portion of the first optical path and the second optical path has a/similar change in SOP.Type: GrantFiled: May 19, 2020Date of Patent: August 31, 2021Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Zhiping Jiang, Ali Salehiomran, Yasser Chiniforooshan
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Patent number: 11101885Abstract: A bidirectional optical repeater having two unidirectional optical amplifiers and a supervisory optical circuit connected to optically couple the corresponding unidirectional optical paths. In an example embodiment, the supervisory optical circuit provides three pathways therethrough for supervisory optical signals, the first pathway being from the output of the first optical amplifier to the input of the second optical amplifier, the second pathway being between the input of the first optical amplifier and the input of the second optical amplifier, and the third pathway being from the output of the second optical amplifier to the input of the first optical amplifier. The pathways are arranged such that the remote monitoring equipment of the corresponding optical transport system can use optical time-domain reflectometry to determine and monitor, as a function of time, the individual gains of the first and second optical amplifiers.Type: GrantFiled: May 4, 2018Date of Patent: August 24, 2021Assignee: ALCATEL SUBMARINE NETWORKSInventors: Omar Ait Sab, Ludivine Moirot
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Patent number: 11095388Abstract: The de-multiplexing unit 2 de-multiplexes an inputted optical wavelength multiplexed signal into a first optical wavelength multiplexed signal having a first wavelength band and a second optical wavelength multiplexed signal having a second wavelength band in a longer wavelength band than the first wavelength band. The first optical amplifier 3 amplifies the first optical wavelength multiplexed signal. The second optical amplifier 4 amplifies the second optical wavelength multiplexed signal. The multiplexer 5 multiplexes the amplified first optical wavelength multiplexed signal and the amplified second optical wavelength multiplexed signal and outputs the multiplexed signal to a Raman amplifier 6. The first optical amplifier 3 adjusts the amplification rate of the first optical wavelength multiplexed signal so that the intensity of light in the second wavelength band is compensated for by the Raman effect in the Raman amplifier 6.Type: GrantFiled: September 18, 2018Date of Patent: August 17, 2021Assignee: NEC CORPORATIONInventor: Yoshihisa Inada
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Patent number: 11088763Abstract: An optical wireless transmission device according to an embodiment of the present invention comprises: a modulation unit for receiving input of a first input signal and outputting a first output signal; and a light source control unit for controlling a first light source in accordance with the first output signal. The first output signal repeats “0” and “1” in a first phase during clock time if a binary value of the first input signal is 0, and repeats “0” and “1” in a phase opposite from the first phase during the clock time if a binary value of the first input signal is 1.Type: GrantFiled: December 31, 2017Date of Patent: August 10, 2021Assignee: KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATIONInventors: Yeong Min Jang, Van Trang Nguyen
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Patent number: 11088774Abstract: A method and apparatus for wavelength allocation for bidirectional optical access. The wavelength allocation method sets a first central wavelength for the optical path terminal to perform downstream transmission to the optical network unit, and a second central wavelength for the optical network unit to perform upstream transmission to the optical network terminal. At this time, the first center wavelength and the second center wavelength are separated by a predetermined wavelength interval, and the first center wavelength is set larger than the second center wavelength.Type: GrantFiled: May 18, 2020Date of Patent: August 10, 2021Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Han Hyub Lee, Hwan Seok Chung
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Patent number: 11056933Abstract: A transceiver assembly for a wireless power transfer system includes a transceiver system comprising a photodiode assembly, a voltage converter and a light emitting diode and a photodiode. The photodiode assembly may be configured to receive a high-power laser beam from a transmitter and to convert the high-power laser beam to electrical energy. The voltage converter may be configured to adjust an input impedance based on a voltage measure of the photodiode assembly so as to maximize power transfer from the photodiode assembly to an energy storage device electrically coupled to the voltage converter. The light emitting diode and the photodiode may be configured to enable free space optical communication with the transmitter. The light emitting diode may emit signals indicating a presence and a location of the transceiver to the transmitter at least when the energy storage device requires a charge.Type: GrantFiled: February 22, 2019Date of Patent: July 6, 2021Assignee: PHION TECHNOLOGIES CORP.Inventors: Jonathan Nydell, Steve Laver, Alan Wang, Matt Nydell
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Patent number: 11057105Abstract: A monitoring device 1 includes an individual alarm reception unit 10 configured to receive individual alarms issued from a plurality of devices constituting an optical transmission network, a table 20 in which a search operator for searching for necessary information, that is information required for treating the individual alarms in the same manner when specifications of the individual alarms are different from each other, is associated with information included in the individual alarms, a search operator extraction unit 30 configured to extract the search operator using the information included in each of the individual alarms as a key, a rule 40 in which the search operator is associated with the necessary information; and a unified alarm information generation unit 50 configured to search the rule 40 using the search operator as a key, compare the information included in the individual alarms with the necessary information corresponding to the search operator, and add information, that is included in theType: GrantFiled: February 14, 2019Date of Patent: July 6, 2021Assignee: Nippon Telegraph and Telephone CorporationInventors: Hiroyuki Oyanagi, Osamu Okino, Yuichiro Ishizuka
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Patent number: 11044017Abstract: An optical wireless transmission method according to an embodiment of the present invention comprises the steps of: a modulator receiving transmission data and a transmission image; the modulator generating a reference image on the basis of the transmission image; the modulator generating a data embedded image on the basis of the transmission data and the transmission image; and the transmitter sequentially transmitting the reference image and the data embedded image by means of a light source panel.Type: GrantFiled: December 13, 2017Date of Patent: June 22, 2021Assignee: KOOKMIN UNIVERSITY INDUSTRY ACADEMY COOPERATION FOUNDATIONInventors: Yeong Min Jang, Van Trang Nguyen
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Patent number: 11038599Abstract: A receiver applies first processing to a digital representation of a received signal to generate a first processed signal having first additive noise and first linear inter-symbol interference (ISI), the first processing comprising a substantially linear operation designed to substantially minimize a sum of variances of the first additive noise and the first linear ISI. The receiver applies second processing to the first processed signal to generate a second processed signal having second additive noise and second linear ISI, the second processing comprising a substantially nonlinear operation designed (i) to make a variance of the second additive noise substantially lower than the variance of the first additive noise, and (ii) to make a sum of the variance of the second additive noise and a variance of the second linear ISI substantially lower than the sum of the variances of the first additive noise and first linear ISI.Type: GrantFiled: October 7, 2020Date of Patent: June 15, 2021Assignee: Ciena CorporationInventors: Shahab Oveis Gharan, Kim B. Roberts
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Patent number: 11039228Abstract: 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: GrantFiled: November 6, 2019Date of Patent: June 15, 2021Assignee: Aeponyx Inc.Inventors: Francois Menard, Martin Berard, Jonathan Briere