Patents by Inventor Fumihide Maeda
Fumihide Maeda 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: 10007075Abstract: The optical module includes a housing having a first opening for inputting or outputting a first electric signal, a second opening for inputting or outputting a second electric signal, and an optical signal port, one or more substrates disposed in the housing, to/from which the first electric signal is input/output and to/from which the second electric signal is input/output, an optical subassembly disposed in the housing and optically connected to the optical signal port, and a control circuit disposed in the housing and mounted on the substrate for controlling the optical subassembly, wherein the first electric signal is an electric signal input to or output from the optical subassembly, the second electric signal is an electric signal input to or output from the control circuit, and the second opening is provided on one side different from other side of the housing on which the first opening is provided.Type: GrantFiled: September 6, 2017Date of Patent: June 26, 2018Assignee: Oclaro Japan, Inc.Inventors: Fumihide Maeda, Hiroki Irie, Hiroyoshi Ishii, Toshikazu Ohtake
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Publication number: 20180074274Abstract: The optical module includes a housing having a first opening for inputting or outputting a first electric signal, a second opening for inputting or outputting a second electric signal, and an optical signal port, one or more substrates disposed in the housing, to/from which the first electric signal is input/output and to/from which the second electric signal is input/output, an optical subassembly disposed in the housing and optically connected to the optical signal port, and a control circuit disposed in the housing and mounted on the substrate for controlling the optical subassembly, wherein the first electric signal is an electric signal input to or output from the optical subassembly, the second electric signal is an electric signal input to or output from the control circuit, and the second opening is provided on one side different from other side of the housing on which the first opening is provided.Type: ApplicationFiled: September 6, 2017Publication date: March 15, 2018Inventors: Fumihide MAEDA, Hiroki IRIE, Hiroyoshi ISHII, Toshikazu OHTAKE
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Patent number: 9703053Abstract: An optical transceiver is configured to use, as an electric signal, a digital modulation signal having a predetermined bit rate. The optical transceiver includes a case having a space for storing a component therein and a resistor being arranged between upper and lower surfaces of the space and having conductance of from 1 S/m to 1,000 S/m. The space has a height equal to or less than a wavelength in a free space of an electromagnetic wave of a frequency corresponding to the predetermined bit rate. At least a part of the height of the space is larger than a half of the wavelength. The height of the space is smaller than a width of the space. The width of the space is smaller than a depth of the space.Type: GrantFiled: June 19, 2015Date of Patent: July 11, 2017Assignee: OCLARO JAPAN, INC.Inventors: Osamu Kagaya, Fumihide Maeda, Hiroyoshi Ishii, Koichi Omori, Koji Takeguchi
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Publication number: 20170168249Abstract: An optical module is attachable to and detachable from a cage. The optical module includes a module case, a slider attached to the outside of the module case for releasing coming-off prevention from the cage, and a leakage reducing layer intervening between the module case and the slider to reduce leakage of an electromagnetic wave.Type: ApplicationFiled: November 29, 2016Publication date: June 15, 2017Inventors: Fumihide MAEDA, Koichi OMORI, Yoshikuni UCHIDA, Yuji SEKINO, Koji TAKEGUCHI, Kazutaka NAGOYA, Hiroyoshi ISHII
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Publication number: 20150372760Abstract: An optical transceiver is configured to use, as an electric signal, a digital modulation signal having a predetermined bit rate. The optical transceiver includes a case having a space for storing a component therein and a resistor being arranged between upper and lower surfaces of the space and having conductance of from 1 S/m to 1,000 S/m. The space has a height equal to or less than a wavelength in a free space of an electromagnetic wave of a frequency corresponding to the predetermined bit rate. At least a part of the height of the space is larger than a half of the wavelength. The height of the space is smaller than a width of the space. The width of the space is smaller than a depth of the space.Type: ApplicationFiled: June 19, 2015Publication date: December 24, 2015Inventors: Osamu KAGAYA, Fumihide MAEDA, Hiroyoshi ISHII, Koichi OMORI, Koji TAKEGUCHI
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Patent number: 8714840Abstract: An optical module includes an electromagnetic wave absorption member. The electric connection member includes a floating portion which is in a floating state spaced apart from the housing and at a position away from a mounting portion by which the electric connection member is mounted on the housing in the direction opposite to the direction that the optical module is inserted into a cage. At least a portion of the electromagnetic wave absorption member is arranged between the housing and the floating portion. The floating portion is brought into contact with an inner side of the cage so as to establish the electrical connection with the inner side of the cage when the housing is inserted into the cage.Type: GrantFiled: September 11, 2012Date of Patent: May 6, 2014Assignee: Oclaro Japan, Inc.Inventors: Hiroo Matsue, Akira Kuwahara, Hideki Sato, Hiroyoshi Isii, Fumihide Maeda
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Publication number: 20130077920Abstract: An optical module includes an electromagnetic wave absorption member. The electric connection member includes a floating portion which is in a floating state spaced apart from the housing and at a position away from a mounting portion by which the electric connection member is mounted on the housing in the direction opposite to the direction that the optical module is inserted into a cage. At least a portion of the electromagnetic wave absorption member is arranged between the housing and the floating portion. The floating portion is brought into contact with an inner side of the cage so as to establish the electrical connection with the inner side of the cage when the housing is inserted into the cage.Type: ApplicationFiled: September 11, 2012Publication date: March 28, 2013Applicant: OCLARO JAPAN, INC.Inventors: Hiroo MATSUE, Akira KUWAHARA, Hideki SATO, Hiroyoshi ISII, Fumihide MAEDA
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Patent number: 8313251Abstract: An optical transceiver has a projection covering member that can suppress EMI noise radiated from a pig-tail part. An elastic covering member covers a projection which includes an optical coupler of an optical sub assembly. The covering member is made of a conductive elastic material having a predetermined resistivity. At least a part of an outer circumference surface of the elastic covering member comes into intimate contact with an outer periphery of a conductive opening part of a case for the optical transceiver while an inner circumference surface of the elastic covering member comes into intimate contact with the projection.Type: GrantFiled: March 30, 2009Date of Patent: November 20, 2012Assignee: Opnext Japan, Inc.Inventors: Fumihide Maeda, Taichi Kogure
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Patent number: 8107823Abstract: In an optical transmission module having a communication module which is freely movable in a case, when a tensile force is generated on an optical cable after connection of an optical transmission module, optical coupling surface and an optical axis center follow each other and thus stable optical transmission can be constantly performed.Type: GrantFiled: December 13, 2006Date of Patent: January 31, 2012Assignee: Opnext Japan, Inc.Inventors: Hiroyoshi Ishii, Toshikazu Ohtake, Osamu Yamada, Fumihide Maeda, Satoshi Motohiro
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Patent number: 7821125Abstract: The invention provides a heat radiating structure which reduces a mechanical stress applied to an electronic part mounted on a printed circuit board including a semiconductor package. The heat radiating structure is constructed by a semiconductor package mounted on a printed circuit board, a thermal conduction sheet arranged on an upper surface of the semiconductor package, and a metal case provided with a heat radiating fin for receiving a heat transmitted form the thermal conduction sheet so as to discharge to an atmospheric air, and the metal case is provided with a concavo-convex structure in a contact portion with the thermal conduction sheet.Type: GrantFiled: April 25, 2008Date of Patent: October 26, 2010Assignee: OpNext Japan, Inc.Inventors: Shigeru Tokita, Hiroo Matsue, Fumihide Maeda
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Publication number: 20100074574Abstract: Provided are an optical transceiver and a projection covering member that can suppress EMI noise radiated from a pig-tail part. An elastic covering member for covering a projection which includes an optical coupler of an optical sub assembly is made of a conductive elastic material having predetermined resistivity. At least a part of an outer circumference surface of the elastic covering member comes into intimate contact with an outer periphery of a conductive opening part of a case while an inner circumference surface of the elastic covering member contacts with the projection.Type: ApplicationFiled: March 30, 2009Publication date: March 25, 2010Applicant: Opnext Japan, Inc.Inventors: Fumihide MAEDA, Taichi KOGURE
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Publication number: 20090039503Abstract: The invention provides a heat radiating structure which reduces a mechanical stress applied to an electronic part mounted on a printed circuit board including a semiconductor package. The heat radiating structure is constructed by a semiconductor package mounted on a printed circuit board, a thermal conduction sheet arranged on an upper surface of the semiconductor package, and a metal case provided with a heat radiating fin for receiving a heat transmitted form the thermal conduction sheet so as to discharge to an atmospheric air, and the metal case is provided with a concavo-convex structure in a contact portion with the thermal conduction sheet.Type: ApplicationFiled: April 25, 2008Publication date: February 12, 2009Inventors: Shigeru TOKITA, Hiroo Matsue, Fumihide Maeda
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Patent number: 7334238Abstract: The present invention includes a frame, an optical pick-up module fixed to the frame and a circuit board forming a control circuit fixed to the frame. The frame has fixing parts to other members.Type: GrantFiled: April 20, 2004Date of Patent: February 19, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yuji Tanaka, Kazuo Matsumoto, Takeshi Watanabe, Masanobu Aramaki, Hidetaka Taguchi, Shingo Sagata, Yuichi Uchikawa, Takashi Morishita, Fumihide Maeda, Masanari Esaki, Hirohisa Koizumi, Shinichi Tokumaru, Hiroki Kokubu, Hisashi Arai, Takeshi Sugimoto
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Publication number: 20080037408Abstract: The present invention includes a frame, an optical pick-up module fixed to the frame and a circuit board forming a control circuit fixed to the frame. The frame has fixing parts to other members.Type: ApplicationFiled: August 24, 2007Publication date: February 14, 2008Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yuji TANAKA, Kazuo Matsumoto, Takeshi Watanabe, Masanobu Aramaki, Hidetaka Taguchi, Shingo Sagata, Yuichi Uchikawa, Takashi Morishita, Fumihide Maeda, Masanari Esaki, Hirohisa Koizumi, Shinichi Tokumaru, Hiroki Kokubu, Hisashi Arai, Takeshi Sugimoto
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Publication number: 20070154224Abstract: In an optical transmission module having a communication module which is freely movable in a case, when a tensile force is generated on an optical cable after connection of an optical transmission module, optical coupling surface and an optical axis center follow each other and thus stable optical transmission can be constantly performed.Type: ApplicationFiled: December 13, 2006Publication date: July 5, 2007Inventors: Hiroyoshi Ishii, Toshikazu Ohtake, Osamu Yamada, Fumihide Maeda, Satoshi Motohiro
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Patent number: 6868235Abstract: An optical transmitter receiver module and an apparatus incorporating the same module are provided, which realizes the reduction of power consumption and the enlargement of the operating temperature range.Type: GrantFiled: September 4, 2001Date of Patent: March 15, 2005Assignee: Opnext Japan, Inc.Inventors: Shigeru Tokita, Tadashi Hatano, Fumihide Maeda, Yoichi Honzawa, Katsumi Saito
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Publication number: 20040223447Abstract: The present invention includes a frame, an optical pick-up module fixed to the frame and a circuit board forming a control circuit fixed to the frame. The frame has fixing parts to other members.Type: ApplicationFiled: April 20, 2004Publication date: November 11, 2004Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Inventors: Yuji Tanaka, Kazuo Matsumoto, Takeshi Watanabe, Masanobu Aramaki, Hidetaka Taguchi, Shingo Sagata, Yuichi Uchikawa, Takashi Morishita, Fumihide Maeda, Masanari Esaki, Hirohisa Koizumi, Shinichi Tokumaru, Hiroki Kokubu, Hisashi Arai, Takeshi Sugimoto
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Publication number: 20030011877Abstract: An optical transmitter receiver module and an apparatus incorporating the same module are provided, which realizes the reduction of power consumption and the enlargement of the operating temperature range.Type: ApplicationFiled: September 4, 2001Publication date: January 16, 2003Inventors: Shigeru Tokita, Tadashi Hatano, Fumihide Maeda, Honzawa Yoichi, Katsumi Saito