Patents by Inventor Changbao Ma
Changbao Ma 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: 20220113476Abstract: An optical connector includes a housing having a resilient member and an optical ferrule. The optical ferrule includes a plurality of attachment areas for receiving and securing a plurality of optical waveguides and a light redirecting side for changing a direction of light received from an optical waveguide. The optical connector is configured such that when an optical waveguide is received and secured in any of the attachment areas and light from the optical waveguide propagates along an optical path, the resilient member is not in the optical path. When the optical ferrule mates with a mating optical ferule, the resilient member is resiliently deformed to resiliently force the optical ferrule against the mating optical ferrule.Type: ApplicationFiled: December 21, 2021Publication date: April 14, 2022Inventors: Changbao Ma, Alexander W. Barr, Daniel F. Cronch
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Patent number: 11237340Abstract: An optical connector includes a housing having a resilient member and an optical ferrule. The optical ferrule includes a plurality of attachment areas for receiving and securing a plurality of optical waveguides and a light redirecting side for changing a direction of light received from an optical waveguide. The optical connector is configured such that when an optical waveguide is received and secured in any of the attachment areas and light from the optical waveguide propagates along an optical path, the resilient member is not in the optical path. When the optical ferrule mates with a mating optical ferule, the resilient member is resiliently deformed to resiliently force the optical ferrule against the mating optical ferrule.Type: GrantFiled: March 18, 2020Date of Patent: February 1, 2022Assignee: 3M Innovative Properties CompanyInventors: Changbao Ma, Alexander W. Barr, Daniel F. Cronch
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Publication number: 20210215884Abstract: A light coupling element including a groove and a light redirecting member is described. The groove is for receiving and aligning an optical waveguide and incudes an open front end and a back end. The light redirecting member includes an input side for receiving light from an optical waveguide received and supported in the groove and a light redirecting side for changing a direction of light received from the input side. The groove may include a bottom surface extending between the front and back ends of the groove and including a raised bottom surface portion raised upwardly relative to an unraised bottom surface portion. The unraised bottom surface portion of the bottom surface may be disposed between the raised bottom surface portion of the bottom surface and the input side of the light redirecting member. Optical coupling assemblies including the light coupling element and an optical waveguide are described.Type: ApplicationFiled: June 25, 2019Publication date: July 15, 2021Inventors: Michael A. Haase, Bing Hao, Changbao Ma, Terry L. Smith
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Patent number: 10989881Abstract: An optical connector includes a housing with a bottom wall defining a window therein, and an optical ferrule disposed in the housing and comprising opposing major top and bottom surfaces. The major bottom surface of the optical ferrule faces the bottom wall of the housing. The major top surface includes a groove and a light redirecting surface configured to receive light along a first direction from an optical fiber received and secured in the groove, and redirect the received light along a different second direction. The redirected light exits the optical ferrule though the bottom surface and exits the housing through the window, such that, when the optical connector mates with a mating optical connector including a mating optical ferrule, the mating optical ferrule prevents any of the light exiting the optical ferrule from exiting the housing of the optical connector.Type: GrantFiled: February 20, 2020Date of Patent: April 27, 2021Assignee: 3M Innovative Properties CompanyInventors: Changbao Ma, Boon K. Lee, Bing Hao, Stephen Paul LeBlanc
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Publication number: 20200355873Abstract: An optical connector includes multiple optical subconnectors, wherein each optical subconnector comprises a subconnector housing and one or more optical cable assemblies. The optical connector has two or more housing components, including at least a first housing component and a second housing component. Control of x, y, and z translation of the multiple optical subconnectors is distributed between the first and second housing components such that each housing component controls movement of the optical subconnectors along at least one but not all of the x, y, and z axes.Type: ApplicationFiled: January 10, 2019Publication date: November 12, 2020Inventors: Daniel F. Cronch, Nicholas A. Lee, Boon K. Lee, Michael A. Haase, Changbao Ma
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Publication number: 20200310040Abstract: An optical connector includes a housing having a resilient member and an optical ferrule. The optical ferrule includes a plurality of attachment areas for receiving and securing a plurality of optical waveguides and a light redirecting side for changing a direction of light received from an optical waveguide. The optical connector is configured such that when an optical waveguide is received and secured in any of the attachment areas and light from the optical waveguide propagates along an optical path, the resilient member is not in the optical path. When the optical ferrule mates with a mating optical ferule, the resilient member is resiliently deformed to resiliently force the optical ferrule against the mating optical ferrule.Type: ApplicationFiled: March 18, 2020Publication date: October 1, 2020Inventors: Changbao Ma, Alexander W. Barr, Daniel F. Cronch
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Publication number: 20200278501Abstract: An optical connector includes a housing with a bottom wall defining a window therein, and an optical ferrule disposed in the housing and comprising opposing major top and bottom surfaces. The major bottom surface of the optical ferrule faces the bottom wall of the housing. The major top surface includes a groove and a light redirecting surface configured to receive light along a first direction from an optical fiber received and secured in the groove, and redirect the received light along a different second direction. The redirected light exits the optical ferrule though the bottom surface and exits the housing through the window, such that, when the optical connector mates with a mating optical connector including a mating optical ferrule, the mating optical ferrule prevents any of the light exiting the optical ferrule from exiting the housing of the optical connector.Type: ApplicationFiled: February 20, 2020Publication date: September 3, 2020Inventors: Changbao Ma, Boon K. Lee, Bing Hao, Stephen Paul LeBlanc
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Publication number: 20190049671Abstract: An optical ferrule includes at least one light affecting element configured to affect one or more characteristics of light from an optical waveguide as the light propagates in the optical ferrule, the light affecting element having an input surface. At least one receiving element receives and secures the optical waveguide to the ferrule so that an output surface of the waveguide is optically coupled to the input surface of the light affecting element. A waveguide stop limits movement of the waveguide toward the input surface of the light affecting element when the optical waveguide is installed in the receiving element. A space between the output surface of the optical waveguide and the input surface of the light affecting element is inaccessible to the optical waveguide when the optical waveguide is installed in the receiving element.Type: ApplicationFiled: October 3, 2016Publication date: February 14, 2019Inventors: Michael A. Haase, Terry L. Smith, Bing Hao, Changbao Ma
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Patent number: 9366824Abstract: Optical circuit switches and switching methods are described. An optical circulator may form a first plurality of bidirectional optical beams from a first plurality of input optical beams and a corresponding first plurality of output optical beams. Each bidirectional optical beam may consist of the corresponding input optical beam and the corresponding output optical beam overlaid to follow, in opposing directions, a common optical path. A mirror array may be disposed to reflect the first plurality of bidirectional optical beams. A reflector may be disposed to intercept bidirectional optical beams reflected from the mirror array and to reflect at least some of the intercepted bidirectional optical beams back to the mirror array.Type: GrantFiled: May 6, 2015Date of Patent: June 14, 2016Assignee: CALIENT Technologies, Inc.Inventors: Shifu Yuan, Nan Luo, Changbao Ma
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Publication number: 20150355411Abstract: Optical circuit switches and switching methods are described. An optical circulator may form a first plurality of bidirectional optical beams from a first plurality of input optical beams and a corresponding first plurality of output optical beams. Each bidirectional optical beam may consist of the corresponding input optical beam and the corresponding output optical beam overlaid to follow, in opposing directions, a common optical path. A mirror array may be disposed to reflect the first plurality of bidirectional optical beams. A reflector may be disposed to intercept bidirectional optical beams reflected from the mirror array and to reflect at least some of the intercepted bidirectional optical beams back to the mirror array.Type: ApplicationFiled: May 6, 2015Publication date: December 10, 2015Inventors: Shifu Yuan, Nan Luo, Changbao Ma
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Patent number: 9151891Abstract: Devices based on metamaterial structures to guide and manipulate light, other electromagnetic radiation and acoustic waves. For example, a lens can include a metamaterial structure comprising nano structures of metallic and dielectric materials; and a plasmonic waveguide coupler formed over the metamaterial structure for coupling electromagnetic radiation to or from metamaterial structure. The metamaterial structure has an anisotropic structure and the plasmonic waveguide coupler is structured to include metal and non-metal parts to support surface plasmon polaritons and to cause different phase delays at different locations of an interface with the metamaterial structure in a way that the metamaterial structure and the plasmonic waveguide coupler effect a lens for performing a Fourier transform of the electromagnetic radiation coupled between the metamaterial structure and the plasmonic waveguide coupler.Type: GrantFiled: February 14, 2011Date of Patent: October 6, 2015Assignee: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Changbao Ma, Zhaowei Liu
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Patent number: 9063288Abstract: Optical circuit switches and switching methods are described. A first optical circulator may form a first plurality of bidirectional optical beams from a first plurality of input optical beams and a corresponding first plurality of output optical beams. Each bidirectional optical beam may consist of the corresponding input optical beam and the corresponding output optical beam overlaid to follow, in opposing directions, a common optical path. A first mirror array may be disposed to reflect the first plurality of bidirectional optical beams.Type: GrantFiled: May 29, 2013Date of Patent: June 23, 2015Assignee: Calient Technologies, Inc.Inventors: Shifu Yuan, Nan Luo, Changbao Ma
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Publication number: 20140355933Abstract: Optical circuit switches and switching methods are described. A first optical circulator may form a first plurality of bidirectional optical beams from a first plurality of input optical beams and a corresponding first plurality of output optical beams. Each bidirectional optical beam may consist of the corresponding input optical beam and the corresponding output optical beam overlaid to follow, in opposing directions, a common optical path. A first mirror array may be disposed to reflect the first plurality of bidirectional optical beams.Type: ApplicationFiled: May 29, 2013Publication date: December 4, 2014Inventors: Shifu Yuan, Nan Luo, Changbao Ma
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Patent number: 8768124Abstract: Devices, systems and techniques for directly coupling an optical slot waveguide to another optical waveguide without a taper waveguide region between the two optical waveguides.Type: GrantFiled: January 5, 2010Date of Patent: July 1, 2014Assignee: Georgetown UniversityInventors: Edward R. Van Keuren, Changbao Ma
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Publication number: 20120328240Abstract: Devices based on metamaterial structures to guide and manipulate light, other electromagnetic radiation and acoustic waves. For example, a lens can include a metamaterial structure comprising nano structures of metallic and dielectric materials; and a plasmonic waveguide coupler formed over the metamaterial structure for coupling electromagnetic radiation to or from metamaterial structure. The metamaterial structure has an anisotropic structure and the plasmonic waveguide coupler is structured to include metal and non-metal parts to support surface plasmon polaritons and to cause different phase delays at different locations of an interface with the metamaterial structure in a way that the metamaterial structure and the plasmonic waveguide coupler effect a lens for performing a Fourier transform of the electromagnetic radiation coupled between the metamaterial structure and the plasmonic waveguide coupler.Type: ApplicationFiled: February 14, 2011Publication date: December 27, 2012Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIAInventors: Changbao Ma, Zhaowei Liu
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Publication number: 20110317960Abstract: Devices, systems and techniques for directly coupling an optical slot waveguide to another optical waveguide without a taper waveguide region between the two optical waveguides.Type: ApplicationFiled: January 5, 2010Publication date: December 29, 2011Applicant: GEORGETOWN UNIVERSITYInventors: Edward R. Van Keuren, Changbao Ma
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Publication number: 20100119194Abstract: An optical waveguide includes a core layer having a first core section and a second core section, wherein the first core section is non-axially aligned with the second core section. The optical waveguide also includes a cladding layer disposed about the core layer and a reflector in optical communication with the core layer for directing an electromagnetic wave from the first core section to the second core section.Type: ApplicationFiled: November 13, 2008Publication date: May 13, 2010Applicant: Seagate Technology LLCInventors: Michael Allen Seigler, Changbao Ma