Patents by Inventor HIroto ISHIDA

HIroto ISHIDA 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).

  • Optical cross-connect
    Patent number: 9788089
    Abstract: An optical add-drop apparatus dropping a signal in input optical fibers in an optical cross-connect apparatus or adding a signal into output optical fibers from the cross-connect apparatus, optical cross-connect portions of the cross-connect apparatus connected such that a cross-connect portion internal connection output port is directly connected to an internal connection input port of another cross-connect portion and is indirectly connected via the other cross-connect portion to an internal connection output port of a further cross-connect portion, the add-drop apparatus having: photocouplers connected to part or all of the input fibers connected to each cross-connect portion; and drop signal receiving apparatuses each having optical switches each receiving and alternately selecting a signal output from photocouplers connected to respective different cross-connect portions of the cross-connect portions out of the photocouplers, the drop signal receiving apparatuses selecting a signal of a wavelength for ea
    Type: Grant
    Filed: June 11, 2014
    Date of Patent: October 10, 2017
    Assignee: JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Ken-ichi Sato, Hiroshi Hasegawa, Hiroto Ishida
  • OPTICAL CROSS-CONNECT
    Publication number: 20160142797
    Abstract: An optical add-drop apparatus dropping a signal in input optical fibers in an optical cross-connect apparatus or adding a signal into output optical fibers from the cross-connect apparatus, optical cross-connect portions of the cross-connect apparatus connected such that a cross-connect portion internal connection output port is directly connected to an internal connection input port of another cross-connect portion and is indirectly connected via the other cross-connect portion to an internal connection output port of a further cross-connect portion, the add-drop apparatus having: photocouplers connected to part or all of the input fibers connected to each cross-connect portion; and drop signal receiving apparatuses each having optical switches each receiving and alternately selecting a signal output from photocouplers connected to respective different cross-connect portions of the cross-connect portions out of the photocouplers, the drop signal receiving apparatuses selecting a signal of a wavelength for ea
    Type: Application
    Filed: June 11, 2014
    Publication date: May 19, 2016
    Applicant: JAPAN SCIENCE AND TECHNOLOGY AGENCY
    Inventors: Ken-ichi SATO, Hiroshi HASEGAWA, HIroto ISHIDA