Patents by Inventor Guijun Ji
Guijun Ji 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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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: 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: 20180192169Abstract: An apparatus includes a plurality of ingress ports, a wavelength blocker array, a plurality of egress ports, a plurality of degree drop ports, a plurality of degree add ports, and a wavelength selective cross-connect (WSX) array. The wavelength blocker array has plurality of wavelength blocking units, each wavelength blocking unit is coupled to a corresponding one of the plurality of ingress ports. The wavelength selective cross-connect (WSX) array includes a plurality of 2×2 independently switched 2×2 wavelength selective cross-connect switches, where the WSX array is coupled to the wavelength blocker array, the plurality of egress ports, the plurality of degree drop ports, and the plurality of degree add ports.Type: ApplicationFiled: February 28, 2018Publication date: July 5, 2018Applicant: Oplink Communications US Division, LLCInventors: Tian ZHU, Kun LIU, Hongwei MAO, Guijun JI, Lifu GONG
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Publication number: 20180192168Abstract: An apparatus includes N 1×2 ingress tap couplers, a wavelength blocker array, N 2×1 egress tap couplers, and a wavelength selective cross-connect (WSX) array. A tapped branch of each ingress tap coupler is coupled to a degree drop and where N>1. The wavelength blocker array has N wavelength blocking units, each wavelength blocking unit coupled to a corresponding one of the N 1×2 ingress tap couplers. A tapped branch of each egress tap coupler is coupled to a degree add. The wavelength selective cross-connect (WSX) array is coupled between the wavelength blocker array and the N 2×1 egress tap couplers, where the WSX array includes a plurality of independently switched 2×2 WSX switches.Type: ApplicationFiled: February 28, 2018Publication date: July 5, 2018Applicant: Oplink Communications US Division, LLCInventors: Tian ZHU, Kun Liu, Hongwei Mao, Guijun Ji, Lifu Gong
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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: 9798081Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for optical communications. In one aspect, an optical circulator array includes a plurality of stacked three port circulators each having a respective first port of a first port array, a respective second port of a second port array, and a respective third port of a third port array. Each of the plurality of staked three port circulators share optical components including a first micro lens array optically coupled to the first port array and the third port array, a first walk off crystal, a first half wave plate, a first faraday rotator, a first birefringence wedge pair, a second birefringence wedge pair, a second Faraday rotator, a second half wave plate, a second birefringence walk off crystal, and a second micro lens array optically coupled to the second port array.Type: GrantFiled: June 7, 2017Date of Patent: October 24, 2017Assignee: Oplink Communications, LLCInventors: Hongwei Mao, Zhongsheng Wang, Guijun Ji, Jinyuan Qiao, Tian Zhu, Lifu Gong
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Publication number: 20170269296Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for optical communications. In one aspect, an optical circulator array includes a plurality of stacked three port circulators each having a respective first port of a first port array, a respective second port of a second port array, and a respective third port of a third port array. Each of the plurality of staked three port circulators share optical components including a first micro lens array optically coupled to the first port array and the third port array, a first walk off crystal, a first half wave plate, a first faraday rotator, a first birefringence wedge pair, a second birefringence wedge pair, a second Faraday rotator, a second half wave plate, a second birefringence walk off crystal, and a second micro lens array optically coupled to the second port array.Type: ApplicationFiled: June 7, 2017Publication date: September 21, 2017Applicant: Oplink Communications, LLCInventors: Hongwei MAO, Zhongsheng WANG, Guijun JI, Jinyuan QIAO, Tian ZHU, Lifu GONG
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Patent number: 9696485Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for optical communications. In one aspect, an optical circulator array includes a plurality of stacked three port circulators each having a respective first port of a first port array, a respective second port of a second port array, and a respective third port of a third port array, wherein each of the plurality of stacked three port circulators share optical components including: a first Wollaston prism coupled to the first port array, a first lens, a first half wave plate, a polarization dependent beam path separator, a second half wave plate, a second lens, a propagation direction dependent polarization rotation assembly, a second Wollaston prism coupled to the second port array, and a third Wollaston prism coupled to the third port array.Type: GrantFiled: July 16, 2014Date of Patent: July 4, 2017Assignee: Oplink Communications, LLCInventors: Hongwei Mao, Zhongsheng Wang, Guijun Ji, Jinyuan Qiao, Tian Zhu, Lifu Gong
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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: 20160018594Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for optical communications. In one aspect, an optical circulator array includes a plurality of stacked three port circulators each having a respective first port of a first port array, a respective second port of a second port array, and a respective third port of a third port array, wherein each of the plurality of staked three port circulators share optical components including: a first Wollaston prism coupled to the first port array, a first lens, a first half wave plate, a polarization dependent beam path separator, a second half wave plate, a second lens, a propagation direction dependent polarization rotation assembly, a second Wollaston prism coupled to the second port array, and a third Wollaston prism coupled to the third port array.Type: ApplicationFiled: July 16, 2014Publication date: January 21, 2016Inventors: Hongwei Mao, Zhongsheng Wang, Guijun Ji, Jinyuan Qiao, Tian Zhu, Lifu Gong
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Publication number: 20150256908Abstract: Methods, systems, and apparatus, for optical communications. One apparatus includes a plurality of ingress ports coupled to N units of 1×n splitters, wherein each 1×n splitter includes a plurality of cross connect ingress branches and a drop branch; a plurality of egress ports coupled to N units of n×1 combiners, wherein each n×1 combiner includes a plurality of cross connect egress branches and an add branch; a M×M? fiber shuffle providing cross connect between the ingress branches and the egress branches such that each branch from an ingress 1×n splitter is linked to a branch of each n×1 combiner; and a wavelength blocker array comprising N×n wavelength blocker units where n?N wavelength blocker units, each wavelength blocker unit coupled to a fiber of the M×M? fiber shuffle.Type: ApplicationFiled: March 5, 2014Publication date: September 10, 2015Inventors: Tian Zhu, Kun Liu, Hongwei Mao, Guijun Ji, Lifu Gong
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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: 9057841Abstract: Technologies relating to wavelength division multiplexing are provided. In one implementation, a wavelength division multiplexing (WDM) coupler is provided. The WDM coupler includes an input block including a first tube, the first tube holding an input dual fiber pigtailed capillary, the capillary holding an input fiber and a reflection fiber, a center block including a center tube holding a first inner tube and a second inner tube, the first inner tube holding a first lens within the first inner tube and the second inner tube holding a second lens within the second inner tube, the center block further including a WDM filter positioned between the first lens and the second lens and secured to the end surface of the first inner tube, and an output block including a second tube holding an output single fiber pigtailed capillary, the capillary holding a transmission fiber.Type: GrantFiled: January 3, 2008Date of Patent: June 16, 2015Assignee: Oplink Communications, Inc.Inventors: Guijun Ji, Yanlin Sun
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Publication number: 20110182586Abstract: Technologies relating to wavelength division multiplexing are provided. In one implementation, a wavelength division multiplexing (WDM) coupler is provided. The WDM coupler includes an input block including a first tube, the first tube holding an input dual fiber pigtailed capillary, the capillary holding an input fiber and a reflection fiber, a center block including a center tube holding a first inner tube and a second inner tube, the first inner tube holding a first lens within the first inner tube and the second inner tube holding a second lens within the second inner tube, the center block further including a WDM filter positioned between the first lens and the second lens and secured to the end surface of the first inner tube, and an output block including a second tube holding an output single fiber pigtailed capillary, the capillary holding a transmission fiber.Type: ApplicationFiled: January 3, 2008Publication date: July 28, 2011Inventors: Guijun Ji, Yanlin Sun
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Patent number: 7672551Abstract: The present invention discloses an improved optical device having at least a first and second optical components. The optical device further includes a first extending tube securely attached to the first and second optical components as a first building block wherein the first and second optical components are aligned and position adjusted in the position-holding-and-fixing means and securely attached thereto by a room-temperature UV curable epoxy UV cured at room temperature. The optical device then further assembled using a step-by-step building block assembling process with more building blocks assembled by optical components similar to the first building block described above. In other preferred embodiment, the first and second optical components held in the extending tube having a pre-aligned dihedral angle between the first and second optical components.Type: GrantFiled: February 11, 2005Date of Patent: March 2, 2010Assignee: Oplink Communications, Inc.Inventor: Guijun Ji
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Publication number: 20060182390Abstract: The present invention discloses an improved optical device having at least a first and second optical components. The optical device further includes a first extending tube securely attached to the first and second optical components as a first building block wherein the first and second optical components are aligned and position adjusted in the position-holding-and-fixing means and securely attached thereto by a room-temperature UV curable epoxy UV cured at room temperature. The optical device then further assembled using a step-by-step building block assembling process with more building blocks assembled by optical components similar to the first building block described above. In other preferred embodiment, the first and second optical components held in the extending tube having a pre-aligned dihedral angle between the first and second optical components.Type: ApplicationFiled: February 11, 2005Publication date: August 17, 2006Inventor: Guijun Ji