Patents by Inventor Shunichi Souma
Shunichi Souma 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: 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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Patent number: 7590312Abstract: The present invention discloses an interferometer optical switch that can carry out switching over a broad band and has a high extinction ratio and large fabrication tolerance. The interferometer optical switch employs a phase generating coupler, the phase difference of the output of which has wavelength dependence, as at least one of the optical multi/demultiplexing device included in the interferometer optical switch. A wavelength insensitive interferometer optical switch is implemented by making the sum 2?{?1(?)+??L(?)+?2(?)} constant regardless of the wavelength, where ?1(?) is the phase produced by the first optical multi/demultiplexing device, 2???L(?) is the phase difference of the optical delay line with an optical path length difference of ?L, and 2??2(?) is the phase produced by the second optical multi/demultiplexing device.Type: GrantFiled: July 2, 2004Date of Patent: September 15, 2009Assignee: Nippon Telegraph and Telephone CorporationInventors: Takayuki Mizuno, Hiroshi Takahashi, Tsutomu Kitoh, Manabu Oguma, Shunichi Souma
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Patent number: 7272317Abstract: In an optical multiplexing communication system, a frequency conversion of the optical multiplexed signals having different amplitudes for different communication channels into a plurality of optical pulse sequences having different carrier frequencies for different communication channels is carried out, and the plurality of optical pulse sequences obtained by the frequency conversion are demultiplexed into optical pulse sequences for different communication channels.Type: GrantFiled: May 12, 2003Date of Patent: September 18, 2007Assignee: Nippon Telegraph and Telephone CorporationInventors: Masao Kato, Kazuo Fujiura, Takashi Kurihara, Shunichi Souma
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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: 20060072866Abstract: The present invention discloses an interferometer optical switch that can carry out switching over a broad band and has a high extinction ratio and large fabrication tolerance. The interferometer optical switch employs a phase generating coupler, the phase difference of the output of which has wavelength dependence, as at least one of the optical multi/demultiplexing device included in the interferometer optical switch. A wavelength insensitive interferometer optical switch is implemented by making the sum 2?{?1(?)+??L(?)+?2(?)} constant regardless of the wavelength, where ?1(?) is the phase produced by the first optical multi/demultiplexing device, 2???L(?) is the phase difference of the optical delay line with an optical path length difference of ?L, and 2??2(?) is the phase produced by the second optical multi/demultiplexing device.Type: ApplicationFiled: July 2, 2004Publication date: April 6, 2006Inventors: Takayuki Mizuno, Hiroshi Takahashi, Tsutomu Kitoh, Manabu Oguma, Shunichi Souma
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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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Publication number: 20030231885Abstract: In an optical multiplexing communication system, a frequency conversion of the optical multiplexed signals having different amplitudes for different communication channels into a plurality of optical pulse sequences having different carrier frequencies for different communication channels is carried out, and the plurality of optical pulse sequences obtained by the frequency conversion are demultiplexed into optical pulse sequences for different communication channels.Type: ApplicationFiled: May 12, 2003Publication date: December 18, 2003Inventors: Masao Kato, Kazuo Fujiura, Takashi Kurihara, Shunichi Souma