Patents by Inventor Kazunori Seno
Kazunori Seno 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: 11777632Abstract: An input/output, a wavelength multiplexer/demultiplexer, and a spatial light modulator are provided. The input/output is configured by an optical waveguide into which multiplex light with multiple wavelengths enters. The wavelength multiplexer/demultiplexer performs demultiplexing for forming a plurality of signal lights by spatially demultiplexing the multiplex light emitted from the input/output, by one diffraction, into light of each wavelength, and multiplexing for multiplexing the spatially demultiplexed plurality of signal lights that are different in wavelength. The wavelength multiplexer/demultiplexer is configured by a metasurface. The spatial light modulator reflects each of the plurality of signal lights in a set direction.Type: GrantFiled: July 5, 2019Date of Patent: October 3, 2023Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Shiori Konisho, Toshikazu Hashimoto, Kazunori Seno, Mitsumasa Nakajima, Masashi Miyata
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Patent number: 11635641Abstract: A problem is to provide a planar lightwave circuit optical device capable of facilitating mounting of connection to a printed circuit board and realizing downsizing of a device chip. A planar lightwave circuit optical device of the present invention is characterized by mounting an electrical connector (FPC connector) by means of soldering on an electrode pad of an electrical wire connected to an electrical drive unit (such as a heater) in a device formed by using a planar lightwave circuit (PLC).Type: GrantFiled: November 30, 2018Date of Patent: April 25, 2023Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Ai Yanagihara, Kenya Suzuki, Ryoichi Kasahara, Kazunori Seno, Yuko Kawajiri
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Publication number: 20220247508Abstract: An input/output, a wavelength multiplexer/demultiplexer, and a spatial light modulator are provided. The input/output is configured by an optical waveguide into which multiplex light with multiple wavelengths enters. The wavelength multiplexer/demultiplexer performs demultiplexing for forming a plurality of signal lights by spatially demultiplexing the multiplex light emitted from the input/output, by one diffraction, into light of each wavelength, and multiplexing for multiplexing the spatially demultiplexed plurality of signal lights that are different in wavelength. The wavelength multiplexer/demultiplexer is configured by a metasurface. The spatial light modulator reflects each of the plurality of signal lights in a set direction.Type: ApplicationFiled: July 5, 2019Publication date: August 4, 2022Inventors: Shiori Konisho, Toshikazu Hashimoto, Kazunori Seno, Mitsumasa Nakajima, Masashi Miyata
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Publication number: 20200363694Abstract: A problem is to provide a planar lightwave circuit optical device capable of facilitating mounting of connection to a printed circuit board and realizing downsizing of a device chip. A planar lightwave circuit optical device of the present invention is characterized by mounting an electrical connector (FPC connector) by means of soldering on an electrode pad of an electrical wire connected to an electrical drive unit (such as a heater) in a device formed by using a planar lightwave circuit (PLC).Type: ApplicationFiled: November 30, 2018Publication date: November 19, 2020Inventors: Ai Yanagihara, Kenya Suzuki, Ryoichi Kasahara, Kazunori Seno, Yuko Kawajiri
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Patent number: 10797817Abstract: Provided is an optical signal processing device that can operate simultaneously for a plurality of wavelength bands. The optical signal processing device includes a WDM coupler array including a plurality of WDM couplers for separating the C band and the L band for the respective ports; input/output port groups provided for the C band and the L band, respectively; a micro lens array; a diffraction grating; a lens; and a spatial light modulator arranged in this order. The spatial light modulator collects light at different positions for the respective wavelengths, thus allowing all wavelengths to be independently subjected to a phase modulation. Light subjected to the desired phase modulation by the spatial light modulator is reflected and is deflected to have an angle corresponding to any desired port of the input/output port group, and then is optically-coupled to an input/output port depending on the deflection angle.Type: GrantFiled: December 25, 2017Date of Patent: October 6, 2020Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kazunori Seno, Kenya Suzuki, Mitsumasa Nakajima, Keita Yamaguchi, Masashi Miyata, Takashi Goh, Toshikazu Hashimoto
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Publication number: 20190349112Abstract: Provided is an optical signal processing device that can operate simultaneously for a plurality of wavelength bands. The optical signal processing device includes a WDM coupler array including a plurality of WDM couplers for separating the C band and the L band for the respective ports; input/output port groups provided for the C band and the L band, respectively; a micro lens array; a diffraction grating; a lens; and a spatial light modulator arranged in this order. The spatial light modulator collects light at different positions for the respective wavelengths, thus allowing all wavelengths to be independently subjected to a phase modulation. Light subjected to the desired phase modulation by the spatial light modulator is reflected and is deflected to have an angle corresponding to any desired port of the input/output port group, and then is optically-coupled to an input/output port depending on the deflection angle.Type: ApplicationFiled: December 25, 2017Publication date: November 14, 2019Inventors: Kazunori Seno, Kenya Suzuki, Mitsumasa Nakajima, Keita Yamaguchi, Masashi Miyata, Takashi Goh, Toshikazu Hashimoto
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Patent number: 9967050Abstract: The invention provides a low-cost and easy-to-align optical signal processing device on which a plurality of WSS function units can be integrated using only a single lens. Optical signals input to the first input/output port group (101-1) are output into a space as collimated light via the microlens array (102). The signal light propagating through the space will be wavelength-demultiplexed by the diffraction grating (103), focused by the lens (104), and focused at the upper part in the drawing, with respect to the y-axis direction of the spatial light modulator (105). The light provided with a desired phase modulation and reflected by the spatial light modulator (105) is deflected at a desired angle in the y-z plane according to its phase setting, and further optically coupled to an arbitrary port by passing through the lens (104) again, thus the switching operation is completed.Type: GrantFiled: July 16, 2014Date of Patent: May 8, 2018Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kazunori Seno, Kenya Suzuki, Yuichiro Ikuma, Yuzo Ishii, Koichi Hadama
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Patent number: 9723387Abstract: To provide an optical signal processing device that can collect light from an input waveguide to form a beam array having a small diameter. The optical signal processing device includes input waveguides 302a to 302c, an array waveguide 305 and a slab waveguide 304 that is connected to a first arc 304a having the single point C as a center and input waveguides 302a to 302c and that is connected to a second arc 404b having the single point C as a center and an array waveguide 305.Type: GrantFiled: September 27, 2013Date of Patent: August 1, 2017Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kenya Suzuki, Kazunori Seno, Naoki Ooba, Tetsuo Takahashi, Toshio Watanabe, Takeshi Kawai, Mitsunori Fukutoku, Yuzo Ishii, Koichi Hadama, Yuichi Higuchi
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Patent number: 9645321Abstract: A wavelength selection switch can decrease the amount of increase in size and cost of a node device by integrating and sharing the constituent components of a plurality of wavelength selection switches or optical components mounted in a node. The wavelength selection switch has: at least one input port that inputs light; at least one output port that receives light from the input port; at least one light-collecting element that alters the beam shape of the light entering from the input port; at least one scattering element that scatters the light entering from the input port into each wavelength; at least one wavefront control element that causes light of each wavelength scattered by the scattering element to be reflected to the output port for each wavelength.Type: GrantFiled: August 30, 2013Date of Patent: May 9, 2017Assignee: Nippon Telegraph and Telephone CorporationInventors: Yuichi Higuchi, Jo ji Yamaguchi, Koichi Hadama, Yuzo Ishii, Kenya Suzuki, Kazunori Seno, Takeshi Kawai
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Patent number: 9588300Abstract: An optical input/output device includes a phase modulator element and an optical element. The phase modulator element includes a plurality of pixels arranged in a matrix and is configured to change an optical phase of signal light by applying a driving signal corresponding to a phase pattern. The optical element is configured to convert a direction of exit of the signal light so as to irradiate each pixel with the signal light from the input port. A pattern generator unit includes superimposing means for superimposing a periodic phase pattern having a predetermined period in at least one direction in a plane of the phase modulator element, and means for controlling an amplitude of the periodic phase pattern. The signal light is diffracted to a position according to the period of the superimposed periodic phase pattern, so that light intensity of the signal light is dispersed.Type: GrantFiled: December 6, 2013Date of Patent: March 7, 2017Assignee: Nippon Telegraph and Telephone CorporationInventors: Mitsumasa Nakajima, Keita Yamaguchi, Joji Yamaguchi, Yuzo Ishii, Koichi Hadama, Naru Nemoto, Etsu Hashimoto, Kazunori Seno, Kenya Suzuki, Yoshito Jin
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Patent number: 9467755Abstract: An optical switch includes an input port, output ports, and a spatial light modulating section that receives an optical signal from the input port to deflect the optical signal to a selected one of the output ports. A phase distribution with the same radius of curvature as that of a wavefront of the optical signal and a phase distribution that allows the deflected optical signal to be coupled to the output port are set for the spatial light modulating section.Type: GrantFiled: August 30, 2013Date of Patent: October 11, 2016Assignee: Nippon Telegraph and Telephone CorporationInventors: Kenya Suzuki, Yuzo Ishii, Koichi Hadama, Kazunori Seno
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Publication number: 20160286288Abstract: An optical switch with a flat transmission property is provided. The optical switch includes an input port, an output port, a diffractive grating configured to perform wavelength demultiplexing on an optical signal from the input port, and LCOS configured to deflect the wavelength-demultiplexed optical signal to the output port. The diffractive grating is pre-arranged such that a shape of the optical signal as entering the LCOS is asymmetric with respect to an axis in the LCOS surface that is orthogonal to a wavelength axis of the diffractive grating.Type: ApplicationFiled: October 28, 2014Publication date: September 29, 2016Inventors: Kenya Suzuki, Kazunori Seno, Yuzo Ishii, Koichi Hadama, Naoki Ooba
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Publication number: 20160197695Abstract: The invention provides a low-cost and easy-to-align optical signal processing device on which a plurality of WSS function units can be integrated using only a single lens. Optical signals input to the first input/output port group (101-1) are output into a space as collimated light via the microlens array (102). The signal light propagating through the space will be wavelength-demultiplexed by the diffraction grating (103), focused by the lens (104), and focused at the upper part in the drawing, with respect to the y-axis direction of the spatial light modulator (105). The light provided with a desired phase modulation and reflected by the spatial light modulator (105) is deflected at a desired angle in the y-z plane according to its phase setting, and further optically coupled to an arbitrary port by passing through the lens (104) again, thus the switching operation is completed.Type: ApplicationFiled: July 16, 2014Publication date: July 7, 2016Inventors: Kazunori SENO, Kenya SUZUKI, Yuichiro IKUMA, Yuzo ISHII, Koichi HADAMA
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Patent number: 9307301Abstract: The discloser provides a multi-input and multi-output optical switch capable of switching over all WDM wavelengths. An optical switch according to one embodiment includes: an optical demultiplexing element (3) that demultiplexes an optical signal from at least one input port into individual wavelengths; a first optical deflection element (5), which deflects an incident optical signal, that deflects the wavelength-separated optical signal incoming from the optical demultiplexing element to change a traveling direction for each wavelength to a switch axis direction perpendicular to a wavelength dispersion axis direction; a second optical deflection element (8) that deflects the optical signal incoming from the first optical deflection element to change the traveling direction to the switch axis direction for output to at least one of the output ports; and an optical multiplexing element (10) that multiplexes the optical signal with the different wavelengths incoming from the second optical deflection element.Type: GrantFiled: September 14, 2012Date of Patent: April 5, 2016Assignee: Nippon Telegraph and Telephone CorporationInventors: Kenya Suzuki, Kazunori Seno, Naoki Ooba, Toshio Watanabe, Tetsuo Takahashi
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Publication number: 20150316725Abstract: An optical input/output device includes a phase modulator element and an optical element. The phase modulator element includes a plurality of pixels arranged in a matrix and is configured to change an optical phase of signal light by applying a driving signal corresponding to a phase pattern. The optical element is configured to convert a direction of exit of the signal light so as to irradiate each pixel with the signal light from the input port. A pattern generator unit includes superimposing means for superimposing a periodic phase pattern having a predetermined period in at least one direction in a plane of the phase modulator element, and means for controlling an amplitude of the periodic phase pattern. The signal light is diffracted to a position according to the period of the superimposed periodic phase pattern, so that light intensity of the signal light is dispersed.Type: ApplicationFiled: December 6, 2013Publication date: November 5, 2015Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Mitsumasa Nakajima, Keita Yamaguchi, Joji Yamaguchi, Yuzo Ishii, Koichi Hadama, Naru Nemoto, Etsu Hashimoto, Kazunori Seno, Kenya Suzuki, Yoshito Jin
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Publication number: 20150268421Abstract: A wavelength selection switch can decrease the amount of increase in size and cost of a node device by integrating and sharing the constituent components of a plurality of wavelength selection switches or optical components mounted in a node. The wavelength selection switch has: at least one input port that inputs light; at least one output port that receives light from the input port; at least one light-collecting element that alters the beam shape of the light entering from the input port; at least one scattering element that scatters the light entering from the input port into each wavelength; at least one wavefront control element that causes light of each wavelength scattered by the scattering element to be reflected to the output port for each wavelength.Type: ApplicationFiled: August 30, 2013Publication date: September 24, 2015Inventors: Yuichi Higuchi, Jo ji Yamaguchi, Koichi Hadama, Yuzo Ishii, Kenya Suzuki, Kazunori Seno, Takeshi Kawai
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Publication number: 20150237420Abstract: To provide an optical signal processing device that can collect light from an input waveguide to form a beam array having a small diameter. The optical signal processing device includes input waveguides 302a to 302c, an array waveguide 305 and a slab waveguide 304 that is connected to a first arc 304a having the single point C as a center and input waveguides 302a to 302c and that is connected to a second arc 404b having the single point C as a center and an array waveguide 305.Type: ApplicationFiled: September 27, 2013Publication date: August 20, 2015Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Kenya Suzuki, Kazunori Seno, Naoki Ooba, Tetsuo Takahashi, Toshio Watanabe, Takeshi Kawai, Mitsunori Fukutoku, Yuzo Ishii, Koichi Hadama, Yuichi Higuchi
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Publication number: 20150222967Abstract: An optical switch includes an input port, output ports, and a spatial light modulating section that receives an optical signal from the input port to deflect the optical signal to a selected one of the output ports. A phase distribution with the same radius of curvature as that of a wavefront of the optical signal and a phase distribution that allows the deflected optical signal to be coupled to the output port are set for the spatial light modulating section.Type: ApplicationFiled: August 30, 2013Publication date: August 6, 2015Inventors: Kenya Suzuki, Yuzo Ishii, Koichi Hadama, Kazunori Seno
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Patent number: 9036958Abstract: In an optical component, a part of a waveguide type optical device is fixed to a convex portion of a mount. The optical component includes an optical device support base, a pressure member and a pressure support base. The optical device support base is interposed between the mount and the presser member enough to be slidable in a direction parallel to surfaces of the mount and the presser member.Type: GrantFiled: March 9, 2011Date of Patent: May 19, 2015Assignees: NIPPON TELEGRAPH AND TELEPHONE CORPORATION, NTT ELECTRONICS CORPORATIONInventors: Motohaya Ishii, Naoki Ooba, Kazunori Seno, Yoshiyuki Doi, Ken Tsuzuki, Takao Fukumitsu, Atsushi Murasawa, Fumihiro Ebisawa, Hiroshi Terui, Tomoyo Shibazaki, Yuichi Kikuchi
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Publication number: 20140205291Abstract: The discloser provides a multi-input and multi-output optical switch capable of switching over all WDM wavelengths. An optical switch according to one embodiment includes: an optical demultiplexing element (3) that demultiplexes an optical signal from at least one input port into individual wavelengths; a first optical deflection element (5), which deflects an incident optical signal, that deflects the wavelength-separated optical signal incoming from the optical demultiplexing element to change a traveling direction for each wavelength to a switch axis direction perpendicular to a wavelength dispersion axis direction; a second optical deflection element (8) that deflects the optical signal incoming from the first optical deflection element to change the traveling direction to the switch axis direction for output to at least one of the output ports; and an optical multiplexing element (10) that multiplexes the optical signal with the different wavelengths incoming from the second optical deflection element.Type: ApplicationFiled: September 14, 2012Publication date: July 24, 2014Inventors: Kenya Suzuki, Kazunori Seno, Naoki Ooba, Toshio Watanabe, Tetsuo Takahashi