Patents by Inventor Yosuke Akino
Yosuke Akino 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: 10353054Abstract: Disclosed is a laser light transceiver which is configured so as to include a polarization changing unit 2 for outputting a laser light beam outputted from a transmission light source 1 toward a direction corresponding to the polarization of the laser light beam while changing the polarization of the laser light beam with respect to time. As a result, the laser light transceiver can transmit a laser light beam, whose power is not decreased, in two eye directions without mechanically scanning with the laser light beam.Type: GrantFiled: August 12, 2014Date of Patent: July 16, 2019Assignee: Mitsubishi Electric CorporationInventors: Yasuhiro Hinokuma, Takeshi Sakimura, Yosuke Akino, Takayuki Yanagisawa, Hisamichi Tanaka
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Patent number: 9762022Abstract: The multi wavelength laser device includes a laser light source 10 that emits a plurality of laser lights 20 whose fundamental wavelengths differ from one another, a dispersing element 30 that changes the traveling direction of each of the plurality of laser lights according to the wavelength and the incidence direction, and that emits the laser lights in a state in which the laser lights are superposed on the same axis, and a wavelength conversion element 40 that has a plurality of polarization layers disposed therein and having different periods, and that performs wavelength conversion on the fundamental wave laser lights emitted from the dispersing element 30 and placed in the state in which the laser lights are superposed on the same axis, and emits a plurality of laser lights 50 acquired through the wavelength conversion in a state in which the laser lights are superposed on the same axis.Type: GrantFiled: December 5, 2013Date of Patent: September 12, 2017Assignee: Mitsubishi Electric CorporationInventors: Fumio Shoda, Takayuki Yanagisawa, Yosuke Akino
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Publication number: 20170242100Abstract: Disclosed is a laser light transceiver which is configured so as to include a polarization changing unit 2 for outputting a laser light beam outputted from a transmission light source 1 toward a direction corresponding to the polarization of the laser light beam while changing the polarization of the laser light beam with respect to time. As a result, the laser light transceiver can transmit a laser light beam, whose power is not decreased, in two eye directions without mechanically scanning with the laser light beam.Type: ApplicationFiled: August 12, 2014Publication date: August 24, 2017Applicant: Mitsubishi Electric CorporationInventors: Yasuhiro HINOKUMA, Takeshi SAKIMURA, Yosuke AKINO, Takayuki YANAGISAWA, Hisamichi TANAKA
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Patent number: 9690106Abstract: A ray of light 2 enters vertically to an incident surface 5a of a rod integrator 5, while another ray of light 4 enters obliquely to the incident surface 5a of the rod integrator 5. As a result, the outermost spread angle of the ray of light 4 after entering the rod integrator 5 coincides the outermost spread angle of the ray of light 2 after entering the rod integrator 5.Type: GrantFiled: July 2, 2014Date of Patent: June 27, 2017Assignee: Mitsubishi Electric CorporationInventors: Yosuke Akino, Takayuki Yanagisawa
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Publication number: 20170115494Abstract: A ray of light 2 enters vertically to an incident surface 5a of a rod integrator 5, while another ray of light 4 enters obliquely to the incident surface 5a of the rod integrator 5. As a result, the outermost spread angle of the ray of light 4 after entering the rod integrator 5 coincides the outermost spread angle of the ray of light 2 after entering the rod integrator 5.Type: ApplicationFiled: July 2, 2014Publication date: April 27, 2017Applicant: Mitsubishi Electric CorporationInventors: Yosuke AKINO, Takayuki YANAGISAWA
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Patent number: 9531152Abstract: A laser includes a wavelength selecting element 14 that selectively reflects laser beams with wavelengths ?=?0, ?1, ?2, . . . , ?n (n?1) of different laser oscillation modes from among fundamental oscillation wavelengths of laser beams passing through a wavelength conversion element 13, and the wavelength conversion element 13 that converts the laser beams with the wavelengths ?=?0, ?1, ?2, . . . , ?n (n?1) of different laser oscillation modes reflected by the wavelength selecting element 14 to harmonics. When using a material with a wide gain band as a laser medium 121 of a solid-state laser element 12, a waveguide laser is implemented capable of carrying out high-efficiency wavelength conversion at a plurality of wavelengths within the gain band.Type: GrantFiled: June 6, 2013Date of Patent: December 27, 2016Assignee: Mitsubishi Electric CorporationInventors: Fumio Shohda, Takayuki Yanagisawa, Kyosuke Kuramoto, Yosuke Akino, Kohei Sakai
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Publication number: 20160276799Abstract: The multi wavelength laser device includes a laser light source 10 that emits a plurality of laser lights 20 whose fundamental wavelengths differ from one another, a dispersing element 30 that changes the traveling direction of each of the plurality of laser lights according to the wavelength and the incidence direction, and that emits the laser lights in a state in which the laser lights are superposed on the same axis, and a wavelength conversion element 40 that has a plurality of polarization layers disposed therein and having different periods, and that performs wavelength conversion on the fundamental wave laser lights emitted from the dispersing element 30 and placed in the state in which the laser lights are superposed on the same axis, and emits a plurality of laser lights 50 acquired through the wavelength conversion in a state in which the laser lights are superposed on the same axis.Type: ApplicationFiled: December 5, 2013Publication date: September 22, 2016Inventors: Fumio SHODA, Takayuki YANAGISAWA, Yosuke AKINO
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Patent number: 9337609Abstract: Provided is a passively Q-switched element or the like, which enables mode selection without increasing the number of components in a resonator in a Q-switched pulse laser or the like that oscillates in a great number of high-order modes and which is also applicable to a waveguide type laser in which a mode cannot be controlled spatially. By combining a saturable absorber (2) with a transparent material (3) which is transparent to a laser oscillation wavelength or the like, a passively Q-switched element having a mode selection function and a passively Q-switched laser device in which a passively Q-switched element has a mode selection function, and a planar waveguide type passively Q-switched element and passively Q-switched laser device are provided.Type: GrantFiled: April 25, 2013Date of Patent: May 10, 2016Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yosuke Akino, Yoshihito Hirano, Takayuki Yanagisawa, Hidenori Fukahori
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Patent number: 9312655Abstract: A waveguide is constructed by sandwiching a transparent member (4) and a laser medium (5) between a first clad 3-1 and a second clad 3-2. Pumping light (8) is made to be incident from a direction perpendicular to a direction of the optical axes of first to fourth laser oscillation light beams 9-1 to 9-4, and to alternately propagate through the transparent member (4) and the laser medium (5) in a zigzag manner so as to pump only resonator mode regions in the laser medium (5).Type: GrantFiled: December 3, 2012Date of Patent: April 12, 2016Assignee: MITSUBISHI ELECTRIC CORPORATIONInventors: Yosuke Akino, Takayuki Yanagisawa
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Publication number: 20160087396Abstract: A laser includes a wavelength selecting element 14 that selectively reflects laser beams with wavelengths ?=?0, ?1, ?2, . . . , ?n (n?1) of different laser oscillation modes from among fundamental oscillation wavelengths of laser beams passing through a wavelength conversion element 13, and the wavelength conversion element 13 that converts the laser beams with the wavelengths ?=?0, ?1, ?2, . . . , ?n (n?1) of different laser oscillation modes reflected by the wavelength selecting element 14 to harmonics. When using a material with a wide gain band as a laser medium 121 of a solid-state laser element 12, a waveguide laser is implemented capable of carrying out high-efficiency wavelength conversion at a plurality of wavelengths within the gain band.Type: ApplicationFiled: June 6, 2013Publication date: March 24, 2016Applicant: Mitsubishi Electric CorporationInventors: Fumio SHOHDA, Takayuki YANAGISAWA, Kyosuke KURAMOTO, Yosuke AKINO, Kohei SAKAI
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Publication number: 20150229096Abstract: A waveguide is constructed by sandwiching a transparent member (4) and a laser medium (5) between a first clad 3-1 and a second clad 3-2. Pumping light (8) is made to be incident from a direction perpendicular to a direction of the optical axes of first to fourth laser oscillation light beams 9-1 to 9-4, and to alternately propagate through the transparent member (4) and the laser medium (5) in a zigzag manner so as to pump only resonator mode regions in the laser medium (5).Type: ApplicationFiled: December 3, 2012Publication date: August 13, 2015Applicant: Mitsubishi Electric CorporationInventors: Yosuke Akino, Takayuki Yanagisawa
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Publication number: 20150117476Abstract: Provided is a passively Q-switched element or the like, which enables mode selection without increasing the number of components in a resonator in a Q-switched pulse laser or the like that oscillates in a great number of high-order modes and which is also applicable to a waveguide type laser in which a mode cannot be controlled spatially. By combining a saturable absorber (2) with a transparent material (3) which is transparent to a laser oscillation wavelength or the like, a passively Q-switched element having a mode selection function and a passively Q-switched laser device in which a passively Q-switched element has a mode selection function, and a planar waveguide type passively Q-switched element and passively Q-switched laser device are provided.Type: ApplicationFiled: April 25, 2013Publication date: April 30, 2015Inventors: Yosuke Akino, Yoshihito Hirano, Takayuki Yanagisawa, Hidenori Fukahori
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Patent number: 8743916Abstract: A plane waveguide type laser includes: a plate-shaped laser medium; a semiconductor laser which causes excitation light to enter an end surface of the laser medium; first and second claddings which are bonded to lower and upper surfaces of the laser medium, respectively, to form a waveguide in a vertical direction; a comb heat sink bonded to a lower surface of the first cladding; and a thermal lens producing portion bonded to an upper surface of the second cladding. In this structure, laser oscillation in the vertical direction is performed in a waveguide mode of the laser medium, and the thermal lens producing portion forms a periodic lens effect in the laser medium to perform laser oscillation in a lateral direction in a plurality of resonant modes.Type: GrantFiled: February 5, 2009Date of Patent: June 3, 2014Assignee: Mitsubishi Electric CorporationInventors: Shuhei Yamamoto, Yosuke Akino, Takayuki Yanagisawa, Yoshihito Hirano
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Patent number: 8705165Abstract: An optical wavelength conversion element includes: a wavelength conversion waveguide that has a periodic polarization reversal structure having alternately and cyclically formed domains of which polarization directions are inverted, that guides light as a fundamental wave corresponding to the periodic polarization reversal structure, and performs a wavelength conversion of the guided fundamental wave; a first clad that is made of a dielectric having a refractive index lower than that of the wavelength conversion waveguide and is provided in contact with the domains; a second clad that is made of a dielectric having a refractive index lower than that of the wavelength conversion waveguide and is provided in contact with the domains such that the second clad is opposed to the first clad film; a first conducting unit that electrically connects the domains in parallel via the first clad; and a second conducting unit that electrically connects the domains in parallel via the second clad.Type: GrantFiled: September 17, 2009Date of Patent: April 22, 2014Assignee: Mitsubishi Electric CorporationInventors: Yosuke Akino, Yoshihito Hirano, Takayuki Yanagisawa, Shuhei Yamamoto, Tsutomu Nagatsuka, Toshiyuki Ando
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Publication number: 20110255562Abstract: A plane waveguide type laser according to the present invention includes: a plate-shaped laser medium (5); a semiconductor laser (1) which causes excitation light to enter an end surface (5a) of the laser medium (5); first and second claddings (4a and 4b) which are bonded to lower and upper surfaces of the laser medium (5), respectively, to form a waveguide in a vertical direction; a comb heat sink (2) bonded to a lower surface of the first cladding (4a); and thermal lens producing means (20) bonded to an upper surface of the second cladding (4b). In this structure, laser oscillation in the vertical direction is performed in a waveguide mode of the laser medium (5), and the thermal lens producing means (20) forms a periodic lens effect in the laser medium (5) to perform laser oscillation in a lateral direction in a plurality of resonant modes.Type: ApplicationFiled: February 5, 2009Publication date: October 20, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Shuhei Yamamoto, Yosuke Akino, Takayuki Yanagisawa, Yoshihito Hirano
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Publication number: 20110194171Abstract: An optical wavelength conversion element includes: a wavelength conversion waveguide that has a periodic polarization reversal structure having alternately and cyclically formed domains of which polarization directions are inverted, that guides light as a fundamental wave corresponding to the periodic polarization reversal structure, and performs a wavelength conversion of the guided fundamental wave; a first clad that is made of a dielectric having a refractive index lower than that of the wavelength conversion waveguide and is provided in contact with the domains; a second clad that is made of a dielectric having a refractive index lower than that of the wavelength conversion waveguide and is provided in contact with the domains such that the second clad is opposed to the first clad film; a first conducting unit that electrically connects the domains in parallel via the first clad; and a second conducting unit that electrically connects the domains in parallel via the second clad.Type: ApplicationFiled: September 17, 2009Publication date: August 11, 2011Applicant: MITSUBISHI ELECTRIC CORPORATIONInventors: Yosuke Akino, Yoshihito Hirano, Takayuki Yanagisawa, Shuhei Yamamoto, Tsutomu Nagatsuka, Toshiyuki Ando