Patents by Inventor Gongjian Hu
Gongjian Hu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20240106558Abstract: A reconfigurable optical add and drop multiplexer (ROADM) system is provided. The ROADM system may include a switching system which includes at least one first WSS optically coupled to a tapping coupler and configured to receive an input optical signal from a first circulator, transmit a drop optical signal to a demultiplexer to drop one or more first wavelength channels, and output a through optical signal. The switching system may also include at least one second WSS optically coupled to the at least one first WSS and a multiplexer and configured to receive an add optical signal to add one or more second wavelength channels, receive the through optical signal, and output an output optical signal to a second circulator, and at least one OCM configured to monitor the input optical signal and the output optical signal.Type: ApplicationFiled: September 15, 2023Publication date: March 28, 2024Inventors: Minchun Li, Gongjian Hu, Lifu Gong, Feng Qing Zhou
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Patent number: 11506884Abstract: An optical circuit switch device and method for using the device are provided. The device may include a fiber array including a set of optical fibers configured for transmitting optical signals. The device may include a collimator array coupled to the fiber array configured for aligning the optical signals received from the fiber array. The device may include a first mirror array for receiving the optical signals from the collimator array. The device may include a second mirror array for receiving the optical signals from the first mirror array. The device may include a lens located at the fiber array, the lens having a focal point at the second mirror array.Type: GrantFiled: February 13, 2019Date of Patent: November 22, 2022Assignee: Molex, LLCInventors: Gongjian Hu, Kelvin Chau, Lifu Gong
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Patent number: 10873398Abstract: An optical signal transmission apparatus and a method are provided. The apparatus may include a set of optical transmitters, each optical transmitter configured for transmission of light signals at one or more wavelengths of light. The apparatus may include an output port configured for transmission of the light signals through a span of optical fiber. The apparatus may use an input port configured to receive other transmissions of light signals through the span of optical fiber. The apparatus may include a set of light detectors, each light detector configured to detect a time delay or phase characteristic associated with the one or more wavelengths of light. The apparatus may include a processor configured to determine a metric based on the detected time delay or phase characteristic.Type: GrantFiled: July 30, 2019Date of Patent: December 22, 2020Assignee: Molex, LLCInventors: Lifu Gong, Gongjian Hu, Yi Liao, Glenn Lee, Guojiang Hu
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Patent number: 10756815Abstract: A free space optical communication system includes an optical receiver configured to receive a light beam from an optical transmitter wirelessly in free space. The optical receiver includes an array of photodetectors and an electrical circuit. The array of photodetectors is configured to receive the light beam and convert optical signals of the light beam into electrical current. The electrical circuit is electrically coupled to the array of photodetectors and is configured to combine electrical current from the photodetectors and output a voltage or current signal.Type: GrantFiled: August 21, 2018Date of Patent: August 25, 2020Assignee: Molex, LLCInventors: YuYun Shih, Lee Cheung, Gongjian Hu
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Publication number: 20200257106Abstract: An optical circuit switch device and method for using the device are provided. The device may include a fiber array including a set of optical fibers configured for transmitting optical signals. The device may include a collimator array coupled to the fiber array configured for aligning the optical signals received from the fiber array. The device may include a first mirror array for receiving the optical signals from the collimator array. The device may include a second mirror array for receiving the optical signals from the first mirror array. The device may include a lens located at the fiber array, the lens having a focal point at the second mirror array.Type: ApplicationFiled: February 13, 2019Publication date: August 13, 2020Inventors: GONGJIAN HU, KELVIN CHAU, GUOJIANG HU, LIFU GONG
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Patent number: 10620374Abstract: Various methods, systems, and apparatuses, for optical switching are provided. For example, one wavelength selective switch (WSS) includes a plurality of optical ports wherein one or more optical ports are configured to receive one or more input optical beams the one or more input optical beams having a plurality of wavelength channels and wherein one or more of the optical ports are configured to receive one or more wavelength channels of the plurality of wavelength channels for output. The WSS also includes a polarization conditioning assembly, a polarization beam splitter assembly, a direction dependent polarization rotator, a polarization beam splitter, a grating, and a polarization modulator array having a plurality of polarizing modulation cells, each cell configured to independently change a polarization orientation of an optical beam passing through the cell.Type: GrantFiled: October 9, 2017Date of Patent: April 14, 2020Assignee: Molex, LLCInventors: Hongwei Mao, Gongjian Hu, Yi Liao, Guijun Ji, Tian Zhu
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Patent number: 10419125Abstract: A dynamic gain equalizer (DGE) for an optical communication device and related method which are capable of reducing power variations among wavelength division multiplexing (WDM) signals. The DGE and method use an optical attenuation device configured such that the ratio of pixel gap distance to the channel beam diameter at the point of incident to the optical attenuation device is less than or equal to 0.06. The DGE can produce output signal sets that have ripple increases of less than 0.1 db over the input signal sets.Type: GrantFiled: June 11, 2018Date of Patent: September 17, 2019Assignee: Molex, LLCInventors: Gongjian Hu, Lifu Gong, Yi Liao, Tian Zhu
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Patent number: 10393968Abstract: A wavelength selective switch includes a plurality of optical ports, a polarization conditioning system, a dispersion system, and a switching system. The switching system includes at least one transmissive stage and a reflective polarization modulator. Each transmissive stage has a transmissional polarization modulator and a symmetrical beam polarization separator. The transmissional polarization modulator includes transmissive first cells each being configured to change a polarization orientation of an optical beam passing through the cell. The symmetrical beam polarization separator is configured to redirect the optical beam passing therethrough based upon its polarization. The reflective polarization modulator includes a birefringence section and a reflective section.Type: GrantFiled: July 10, 2018Date of Patent: August 27, 2019Assignee: Molex, LLCInventors: Gongjian Hu, Lifu Gong, Yi Liao, Tian Zhu
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Patent number: 10374708Abstract: An optical communication device and related method are provided for reducing power variations among wavelength division multiplexing (WDM) signals. The device includes a dynamic gain equalizer (DGE) coupled to an optical communication path carrying WDM optical signals. The DGE is controlled in response to signals generated by an optical channel monitor (OCM). The OCM monitors signals coming into the DGE and monitors the signals leaving the DGE to thus monitor the WDM spectrum for optical signal power variations and adjust the DGE to reduce the signal power variations.Type: GrantFiled: March 22, 2018Date of Patent: August 6, 2019Assignee: Molex, LLCInventors: Yi Liao, Gongjian Hu, Tian Zhu, Guijun Ji, Lifu Gong
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Publication number: 20190235170Abstract: Various methods, systems, and apparatuses, for optical switching are provided. For example, one wavelength selective switch (WSS) includes a plurality of optical ports wherein one or more optical ports are configured to receive one or more input optical beams the one or more input optical beams having a plurality of wavelength channels and wherein one or more of the optical ports are configured to receive one or more wavelength channels of the plurality of wavelength channels for output. The WSS also includes a polarization conditioning assembly, a polarization beam splitter assembly, a direction dependent polarization rotator, a polarization beam splitter, a grating, and a polarization modulator array having a plurality of polarizing modulation cells, each cell configured to independently change a polarization orientation of an optical beam passing through the cell.Type: ApplicationFiled: October 9, 2017Publication date: August 1, 2019Inventors: HONGWEI MAO, GONGJIAN HU, YI LIAO, GUIJUN JI, TIAN ZHU
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Publication number: 20190199438Abstract: A free space optical communication system includes an optical receiver configured to receive a light beam from an optical transmitter wirelessly in free space. The optical receiver includes an array of photodetectors and an electrical circuit. The array of photodetectors is configured to receive the light beam and convert optical signals of the light beam into electrical current. The electrical circuit is electrically coupled to the array of photodetectors and is configured to combine electrical current from the photodetectors and output a voltage or current signal.Type: ApplicationFiled: August 21, 2018Publication date: June 27, 2019Applicant: Molex, LLCInventors: YuYun SHIH, Lee CHEUNG, Gongjian HU
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Patent number: 9927577Abstract: Methods, systems, and apparatus for optical wavelength selective switching. One 2×2 wavelength selective switch array includes a plurality of optical input ports configured to receive one or more optical input beams, and a plurality of optical output ports configured to receive one or more one or more optical output beams wherein the plurality of optical input ports and optical output ports form an array of 2×2 optical port pairs; one or more optical conditioning and wavelength dispersion elements; a polarization modulator array having a plurality of polarizing modulation cells, each cell configured to independently change a polarization orientation of an optical beam passing through the cell and associated with a particular wavelength channel; and a polarization-selective beam-routing optical element configured to route each particular input beam to either a first output port or a second output port according to polarization orientation.Type: GrantFiled: March 6, 2017Date of Patent: March 27, 2018Assignee: Oplink Communications, LLCInventors: Hongwei Mao, Lifu Gong, Gongjian Hu, Guijun Ji, Tian Zhu, Kun Lu
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Patent number: 9910246Abstract: An auto-focus system employing a tunable liquid crystal lens is provided that collects images at different optical power values as the liquid crystal molecules are excited between a ground state and a maximum optical power state tracking image focus scores. An image is acquired at a desired optical power value less than maximum optical power established with the liquid crystal molecules closer a fully excited state than the maximum optical power state having the same image focus score. This drive signal employed during image acquisition uses more power than was used to achieve the same optical power value during the auto-focus scan, while actively driving the liquid crystal molecules is fast. A pause due to image transfer/processing delays after acquisition is employed to allow slow relaxation of the liquid crystal molecules back to the ground state in preparation for a subsequent focus search.Type: GrantFiled: June 29, 2016Date of Patent: March 6, 2018Assignee: LENSVECTOR INC.Inventors: Armen Zohrabyan, Tigran Galstian, Karen Asatryan, Vladimir Presniakov, Marco Thiboutot, Aram Bagramyan, Amir Tork, Jeffrey James Parker, Ted Cooper, Behzad Khodadad, Gongjian Hu, Chong I Cheang
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Publication number: 20170176687Abstract: Methods, systems, and apparatus for optical wavelength selective switching. One 2×2 wavelength selective switch array includes a plurality of optical input ports configured to receive one or more optical input beams, and a plurality of optical output ports configured to receive one or more one or more optical output beams wherein the plurality of optical input ports and optical output ports form an array of 2×2 optical port pairs; one or more optical conditioning and wavelength dispersion elements; a polarization modulator array having a plurality of polarizing modulation cells, each cell configured to independently change a polarization orientation of an optical beam passing through the cell and associated with a particular wavelength channel; and a polarization-selective beam-routing optical element configured to route each particular input beam to either a first output port or a second output port according to polarization orientation.Type: ApplicationFiled: March 6, 2017Publication date: June 22, 2017Applicant: Oplink Communications, LLCInventors: Hongwei MAO, Lifu GONG, Gongjian HU, Guijun JI, Tian ZHU, Kun LU
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Patent number: 9588299Abstract: Methods, systems, and apparatus for optical wavelength selective switching. One 2×2 wavelength selective switch array includes a plurality of optical input ports configured to receive one or more optical input beams, and a plurality of optical output ports configured to receive one or more one or more optical output beams wherein the plurality of optical input ports and optical output ports form an array of 2×2 optical port pairs; one or more optical conditioning and wavelength dispersion elements; a polarization modulator array having a plurality of polarizing modulation cells, each cell configured to independently change a polarization orientation of an optical beam passing through the cell and associated with a particular wavelength channel; and a polarization-selective beam-routing optical element configured to route each particular input beam to either a first output port or a second output port according to polarization orientation.Type: GrantFiled: January 29, 2014Date of Patent: March 7, 2017Assignee: Oplink Communications, Inc.Inventors: Hongwei Mao, Lifu Gong, Gongjian Hu, Guijun Ji, Tian Zhu, Kun Liu
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Publication number: 20160377830Abstract: An auto-focus system employing a tunable liquid crystal lens is provided that collects images at different optical power values as the liquid crystal molecules are excited between a ground state and a maximum optical power state tracking image focus scores. An image is acquired at a desired optical power value less than maximum optical power established with the liquid crystal molecules closer a fully excited state than the maximum optical power state having the same image focus score. This drive signal employed during image acquisition uses more power than was used to achieve the same optical power value during the auto-focus scan, while actively driving the liquid crystal molecules is fast. A pause due to image transfer/processing delays after acquisition is employed to allow slow relaxation of the liquid crystal molecules back to the ground state in preparation for a subsequent focus search.Type: ApplicationFiled: June 29, 2016Publication date: December 29, 2016Inventors: Armen Zohrabyan, Tigran Galstian, Karen Asatryan, Vladimir Presniakov, Marco Thiboutot, Aram Bagramyan, Amir Tork, Jeffrey James Parker, Ted Cooper, Behzad Khodadad, Gongjian Hu, Chong I Cheang
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Patent number: 9405093Abstract: An auto-focus system employing a tunable liquid crystal lens is provided that collects images at different optical power values as the liquid crystal molecules are excited between a ground state and a maximum optical power state tracking image focus scores. An image is acquired at a desired optical power value less than maximum optical power established with the liquid crystal molecules closer a fully excited state than the maximum optical power state having the same image focus score. This drive signal employed during image acquisition uses more power than was used to achieve the same optical power value during the auto-focus scan, while actively driving the liquid crystal molecules is fast. A pause due to image transfer/processing delays after acquisition is employed to allow slow relaxation of the liquid crystal molecules back to the ground state in preparation for a subsequent focus search.Type: GrantFiled: April 7, 2015Date of Patent: August 2, 2016Assignee: LENSVECTOR INC.Inventors: Armen Zohrabyan, Tigran Galstian, Karen Asatryan, Vladimir Presniakov, Marco Thiboutot, Aram Bagramyan, Amir Tork, Jeffrey James Parker, Ted Cooper, Behzad Khodadad, Gongjian Hu, Chong I Cheang
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Publication number: 20150301307Abstract: An auto-focus system employing a tunable liquid crystal lens is provided that collects images at different optical power values as the liquid crystal molecules are excited between a ground state and a maximum optical power state tracking image focus scores. An image is acquired at a desired optical power value less than maximum optical power established with the liquid crystal molecules closer a fully excited state than the maximum optical power state having the same image focus score. This drive signal employed during image acquisition uses more power than was used to achieve the same optical power value during the auto-focus scan, while actively driving the liquid crystal molecules is fast. A pause due to image transfer/processing delays after acquisition is employed to allow slow relaxation of the liquid crystal molecules back to the ground state in preparation for a subsequent focus search.Type: ApplicationFiled: April 7, 2015Publication date: October 22, 2015Applicant: LENSVECTOR INC.Inventors: Armen ZOHRABYAN, Tigran GALSTIAN, Karen ASATRYAN, Vladimir PRESNIAKOV, Marco THIBOUTOT, Aram BAGRAMYAN, Amir TORK, Jeffrey James PARKER, Ted COOPER, Behzad KHODADAD, Gongjian HU, Chong I CHEANG
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Publication number: 20150212275Abstract: Methods, systems, and apparatus for optical wavelength selective switching. One 2×2 wavelength selective switch array includes a plurality of optical input ports configured to receive one or more optical input beams, and a plurality of optical output ports configured to receive one or more one or more optical output beams wherein the plurality of optical input ports and optical output ports form an array of 2×2 optical port pairs; one or more optical conditioning and wavelength dispersion elements; a polarization modulator array having a plurality of polarizing modulation cells, each cell configured to independently change a polarization orientation of an optical beam passing through the cell and associated with a particular wavelength channel; and a polarization-selective beam-routing optical element configured to route each particular input beam to either a first output port or a second output port according to polarization orientation.Type: ApplicationFiled: January 29, 2014Publication date: July 30, 2015Applicant: OPLINK COMMUNICATIONS, INC.Inventors: Hongwei Mao, Lifu Gong, Gongjian Hu, Guijun Ji, Tian Zhu, Kun Lu
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Patent number: 9030595Abstract: An auto-focus system employing a tunable liquid crystal lens is provided that collects images at different optical power values as the liquid crystal molecules are excited between a ground state and a maximum optical power state tracking image focus scores. An image is acquired at a desired optical power value less than maximum optical power established with the liquid crystal molecules closer a fully excited state than the maximum optical power state having the same image focus score. This drive signal employed during image acquisition uses more power than was used to achieve the same optical power value during the auto-focus scan, while actively driving the liquid crystal molecules is fast. A pause due to image transfer/processing delays after acquisition is employed to allow slow relaxation of the liquid crystal molecules back to the ground state in preparation for a subsequent focus search.Type: GrantFiled: October 14, 2011Date of Patent: May 12, 2015Assignee: Lensvector Inc.Inventors: Tigran Galstian, Karen Asatryan, Vladimir Presniakov, Marco Thiboutot, Armen Zohrabyan, Aram Bagramyan, Amir Tork, Ted Cooper, Behzad Khodadad, Gongjian Hu, Chong I Cheang, Jeffrey James Parker