Patents by Inventor Akira Himeno
Akira Himeno 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: 20230084204Abstract: An optical multiplexer reduced in background light and reduced in size is provided. The optical multiplexer takes a plurality of light beams having different wavelengths as input from respective waveguides, and outputs multiple light obtained by multiplexing the plurality of light beams by a directional coupler. Background light is reduced by a reflection groove which reflects excess light outputted from a discard port of the directional coupler, and downsizing of the optical multiplexer is achieved.Type: ApplicationFiled: February 26, 2021Publication date: March 16, 2023Inventors: Akira HIMENO, Koichi HORII, Toshio KATSUYAMA, Shoji YAMADA, Akira NAKAO
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Patent number: 10195765Abstract: As a lower forming plate 8, a forming plate having: a lower plate main body 10 constituted from an electrically conductive material; and a lower embedded electrode 12 embedded in the lower plate main body 10, the lower embedded electrode 12 being electrically insulated from the lower plate main body 10 by an insulator 14 and being embedded so as for a portion thereof to be exposed on the surface of the lower plate main body 10 making contact with a lower lining paper sheet 16 is used.Type: GrantFiled: March 24, 2014Date of Patent: February 5, 2019Assignee: YOSHINO GYPSUM CO., LTD.Inventors: Tsuyoshi Yoshida, Akira Himeno, Tomohiro Noguchi
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Publication number: 20160052167Abstract: As a lower forming plate 8, a forming plate having: a lower plate main body 10 constituted from an electrically conductive material; and a lower embedded electrode 12 embedded in the lower plate main body 10, the lower embedded electrode 12 being electrically insulated from the lower plate main body 10 by an insulator 14 and being embedded so as for a portion thereof to be exposed on the surface of the lower plate main body 10 making contact with a lower lining paper sheet 16 is used.Type: ApplicationFiled: March 24, 2014Publication date: February 25, 2016Inventors: Tsuyoshi YOSHIDA, Akira HIMENO, Tomohiro NOGUCHI
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Patent number: 8615146Abstract: A planar optical waveguide including a clad layer, an optical waveguide having a core embedded in the clad layer; and a groove formed in the clad layer and having a reflection interface for totally reflecting a leaked light leaked from the optical waveguide to the clad layer. Since the reflection interface for totally reflecting the leaked light is formed in the clad layer, the leaked light is prevented from entering into the tap coupler, and the variation of the branching ratio can be reduced.Type: GrantFiled: July 29, 2009Date of Patent: December 24, 2013Assignee: NTT Electronics CorporationInventors: Mitsuru Nagano, Akira Himeno, Masayuki Okuno, Masahiko Naito, Akihito Doi, Daisuke Ogawa, Akira Nagai
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Patent number: 7974502Abstract: An optical module controls its output characteristics electrically and an optical switch constitutes the optical module. An optical waveguide circuit (PLC) and an electronic circuit (IC) for driving the PLC are mounted on the same substrate. The IC is composed of a bare chip to be molded afterward. Wiring of the IC is grouped and integrated on the PLC substrate to achieve higher density and miniaturization of the optical module.Type: GrantFiled: February 23, 2007Date of Patent: July 5, 2011Assignee: Nippon Telegraph and Telephone CorporationInventors: Shinji Mino, Takeshi Kitagawa, Motohaya Ishii, Takashi Yamada, Akira Himeno, Masayuki Okuno, Shunichi Souma, Takashi Goh
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Publication number: 20110110629Abstract: A planar optical waveguide including a clad layer, an optical waveguide having a core embedded in the clad layer; and a groove formed in the clad layer and having a reflection interface for totally reflecting a leaked light leaked from the optical waveguide to the clad layer. Since the reflection interface for totally reflecting the leaked light is formed in the clad layer, the leaked light is prevented from entering into the tap coupler, and the variation of the branching ratio can be reduced.Type: ApplicationFiled: July 29, 2009Publication date: May 12, 2011Inventors: Mitsuru Nagano, Akira Himeno, Masayuki Okuno, Masahiko Naito, Akihito Doi, Daisuke Ogawa, Akira Nagai
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Publication number: 20070154137Abstract: An optical module controls its output characteristics electrically and an optical switch constitutes the optical module. An optical waveguide circuit (PLC) and an electronic circuit (IC) for driving the PLC are mounted on the same substrate. The IC is composed of a bare chip to be molded afterward. Wiring of the IC is grouped and integrated on the PLC substrate to achieve higher density and miniaturization of the optical module.Type: ApplicationFiled: February 23, 2007Publication date: July 5, 2007Applicant: Nippon Telegraph and Telephone CorporationInventors: Shinji Mino, Takeshi Kitagawa, Motohaya Ishii, Takashi Yamada, Akira Himeno, Masayuki Okuno, Shunichi Souma, Takashi Goh
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Patent number: 7206473Abstract: An optical module controls its output characteristics electrically and an optical switch constitutes the optical module. An optical waveguide circuit (PLC) and an electronic circuit (IC) for driving the PLC are mounted on the same substrate. The IC is composed of a bare chip to be molded afterward. Wiring of the IC is grouped and integrated on the PLC substrate to achieve higher density and miniaturization of the optical module.Type: GrantFiled: October 26, 2005Date of Patent: April 17, 2007Assignee: Nippon Telegraph and Telephone CorporationInventors: Shinji Mino, Takeshi Kitagawa, Motohaya Ishii, Takashi Yamada, Akira Himeno, Masayuki Okuno, Shunichi Souma, Takashi Goh
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Patent number: 7177495Abstract: An optical module controls its output characteristics electrically and an optical switch constitutes the optical module. An optical waveguide circuit (PLC) and an electronic circuit (IC) for driving the PLC are mounted on the same substrate. The IC is composed of a bare chip to be molded afterward. Wiring of the IC is grouped and integrated on the PLC substrate to achieve higher density and miniaturization of the optical module.Type: GrantFiled: October 26, 2005Date of Patent: February 13, 2007Assignee: Nippon Telegraph and Telephone CorporationInventors: Shinji Mino, Takeshi Kitagawa, Motohaya Ishii, Takashi Yamada, Akira Himeno, Masayuki Okuno, Shunichi Souma, Takashi Goh
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Patent number: 7116859Abstract: An optical module controls its output characteristics electrically and an optical switch constitutes an optical module. An optical waveguide circuit (PLC) and an electronic circuit (IC) for driving the PLC are mounted on the same substrate. The IC is composed of a bare chip to be molded afterward. Wiring of the IC is grouped and integrated on the PLC substrate to achieve higher density and miniaturization of the optical module.Type: GrantFiled: October 26, 2005Date of Patent: October 3, 2006Assignee: Nippon Telegraph and Telephone CorporationInventors: Shinji Mino, Takeshi Kitagawa, Motohaya Ishii, Takashi Yamada, Akira Himeno, Masayuki Okuno, Shunichi Souma, Takashi Goh
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Publication number: 20060034565Abstract: An optical module controls its output characteristics electrically and an optical switch constitutes the optical module. An optical waveguide circuit (PLC) and an electronic circuit (IC) for driving the PLC are mounted on the same substrate. The IC is composed of a bare chip to be molded afterward. Wiring of the IC is grouped and integrated on the PLC substrate to achieve higher density and miniaturization of the optical module.Type: ApplicationFiled: October 26, 2005Publication date: February 16, 2006Inventors: Shinji Mino, Takeshi Kitagawa, Motohaya Ishii, Takashi Yamada, Akira Himeno, Masayuki Okuno, Shunichi Souma, Takashi Goh
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Publication number: 20060034563Abstract: An optical module controls its output characteristics electrically and an optical switch constitutes the optical module. An optical waveguide circuit (PLC) and an electronic circuit (IC) for driving the PLC are mounted on the same substrate. The IC is composed of a bare chip to be molded afterward. Wiring of the IC is grouped and integrated on the PLC substrate to achieve higher density and miniaturization of the optical module.Type: ApplicationFiled: October 26, 2005Publication date: February 16, 2006Inventors: Shinji Mino, Takeshi Kitagawa, Motohaya Ishii, Takashi Yamada, Akira Himeno, Masayuki Okuno, Shunichi Souma, Takashi Goh
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Publication number: 20060034564Abstract: An optical module controls its output characteristics electrically and an optical switch constitutes the optical module. An optical waveguide circuit (PLC) and an electronic circuit (IC) for driving the PLC are mounted on the same substrate. The IC is composed of a bare chip to be molded afterward. Wiring of the IC is grouped and integrated on the PLC substrate to achieve higher density and miniaturization of the optical module.Type: ApplicationFiled: October 26, 2005Publication date: February 16, 2006Inventors: Shinji Mino, Takeshi Kitagawa, Motohaya Ishii, Takashi Yamada, Akira Himeno, Masayuki Okuno, Shunichi Souma, Takashi Goh
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Patent number: 6999652Abstract: An optical module controls its output characteristics electrically and an optical switch constitutes the optical module. An optical waveguide circuit (PLC) and an electronic circuit (IC) for driving the PLC are mounted on the same substrate. The IC is composed of a bare chip to be molded afterward. Wiring of the IC is grouped and integrated on the PLC substrate to achieve higher density and miniaturization of the optical module.Type: GrantFiled: September 30, 2003Date of Patent: February 14, 2006Assignee: Nippon Telegraph and Telephone CorporationInventors: Shinji Mino, Takeshi Kitagawa, Motohaya Ishii, Takashi Yamada, Akira Himeno, Masayuki Okuno, Shunichi Souma, Takashi Goh
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Publication number: 20040086220Abstract: An optical module controls its output characteristics electrically and an optical switch constitutes the optical module. An optical waveguide circuit (PLC) and an electronic circuit (IC) for driving the PLC are mounted on the same substrate. The IC is composed of a bare chip to be molded afterward. Wiring of the IC is grouped and integrated on the PLC substrate to achieve higher density and miniaturization of the optical module.Type: ApplicationFiled: September 30, 2003Publication date: May 6, 2004Applicant: Nippon Telegraph and Telephone CorporationInventors: Shinji Mino, Takeshi Kitagawa, Motohaya Ishii, Takashi Yamada, Akira Himeno, Masayuki Okuno, Shunichi Souma, Takashi Goh
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Patent number: 6724957Abstract: It is an object of the present invention to provide an optical filter which allows parameters to be easily adjusted, which allows birefringence and temperature dependence to be easily compensated for, and which is essentially free from dispersion. The optical filter includes an optical coupler that splits light into two beams, optical couplers connected to outputs of the optical coupler, a first group of two optical waveguide delay lines connected to the coupler, a second group of two optical waveguide delay lines connected to the coupler, an optical coupler that combines lights from the first group of the lines, an optical coupler that combines lights from the second group of the lines, and a multimode interference optical coupler that combines lights from the couplers together.Type: GrantFiled: August 7, 2002Date of Patent: April 20, 2004Assignee: Nippon Telegraph and Telephone CorporationInventors: Takashi Saida, Takayuki Mizuno, Akira Himeno, Katsunari Okamoto, Koichi Takiguchi, Manabu Oguma
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Patent number: 6606433Abstract: An optical multi/demultiplexer is provided that has a wide passband and small crosstalk among its all channels. It includes first and second arrayed waveguide gratings and a 2×2 optical signal processor. The 2×2 optical signal processor includes first to fourth directional couplers, and first to third delay lines. The first to third delay lines have thin film heater phase shifters for correcting phase errors involved in fabrication. Utilizing the 2×2 optical signal processor having a transmission spectrum with a square profile having a wide passband and rejection band makes it possible for the optical multi/demultiplexer that combines the arrayed waveguide gratings with the waveguide type circulating filter (2×2 optical signal processor) to widen the extinction bandwidth of the adjacent channel.Type: GrantFiled: June 27, 2001Date of Patent: August 12, 2003Assignee: Nippon Telegraph and Telephone CorporationInventors: Manabu Oguma, Akira Himeno, Kaname Jinguji, Tsutomu Kitoh, Yoshinori Hibino
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Patent number: 6546161Abstract: A no polarization dependent waveguide type optical circuit can resolve polarization dependency completely and can reduce reflected return light. An intermediate portion of the two connecting waveguides are formed with S-shaped waveguides of the same shape consisted of respectively two curved waveguides or two curved waveguides and straight waveguides connecting the curved waveguides. One polarization mode converter is provided in a groove formed across the S-shaped waveguide, and a perpendicular line to an incident surface of light of the polarization mode converter and the S-shaped waveguide forms an angle greater than 0°.Type: GrantFiled: January 17, 2001Date of Patent: April 8, 2003Assignee: Nippon Telegraph and Telephone CorporationInventors: Masayuki Okuno, Akira Himeno, Yoshinori Hibino, Yasuyuki Inoue
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Publication number: 20030031406Abstract: It is an object of the present invention to provide an optical filter which allows parameters to be easily adjusted, which allows birefringence and temperature dependence to be easily compensated for, and which is essentially free from dispersion. The optical filter includes an optical coupler that splits light into two beams, optical couplers connected to outputs of the optical coupler, a first group of two optical waveguide delay lines connected to the coupler, a second group of two optical waveguide delay lines connected to the coupler, an optical coupler that combines lights from the first group of the lines, an optical coupler that combines lights from the second group of the lines, and a multimode interference optical coupler that combines lights from the couplers together.Type: ApplicationFiled: August 7, 2002Publication date: February 13, 2003Inventors: Takashi Saida, Takayuki Mizuno, Akira Himeno, Katsunari Okamoto, Koichi Takiguchi, Manabu Oguma
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Publication number: 20020015554Abstract: An optical multi/demultiplexer is provided that has a wide passband and small crosstalk among its all channels. It includes first and second arrayed waveguide gratings and a 2×2 optical signal processor. The 2×2 optical signal processor includes first to fourth directional couplers, and first to third delay lines. The first to third delay lines have thin film heater phase shifters for correcting phase errors involved in fabrication. Utilizing the 2×2 optical signal processor having a transmission spectrum with a square profile having a wide passband and rejection band makes it possible for the optical multi/demultiplexer that combines the arrayed waveguide gratings with the waveguide type circulating filter (2×2 optical signal processor) to widen the extinction bandwidth of the adjacent channel.Type: ApplicationFiled: June 27, 2001Publication date: February 7, 2002Applicant: Nippon Telegraph and Telephone CorporationInventors: Manabu Oguma, Akira Himeno, Kaname Jinguji, Tsutomu Kitoh, Yoshinori Hibino