Patents by Inventor Yoshihisa Sakai
Yoshihisa Sakai 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).
-
Patent number: 8333517Abstract: A semiconductor submodule includes a substrate (10) as a first substrate having at least one hole, and at least one optical semiconductor device (16) disposed such that light travels through the hole, a substrate (11) as a second substrate having a semiconductor device (26) for driving the optical semiconductor device (16) and amplifying signals and an electrical connector (28) for inputting and outputting electrical signals from and to the outside, and a flexible cable (12) electrically connecting an end of the substrate (10) and an end of the substrate (11) and allowing the first substrate to be folded opposite to the surface on which the optical semiconductor device is mounted.Type: GrantFiled: February 4, 2008Date of Patent: December 18, 2012Assignee: Nippon Telegraph and Telephone CorporationInventors: Hiromasa Tanobe, Yoshihisa Sakai, Masaru Kobayashi, Ryo Nagase
-
Patent number: 8244133Abstract: A simple optical waveband multiplexer/demultiplexer operable to separate a wavelength-division multiplexed light beam WDM consisting of a plurality of wavebands WB each including a plurality of optical channels, into a predetermined plurality of wavebands WB, and output the separated plurality of wavebands WB from a plurality of output ports, wherein the wavelength-division multiplexed light beam WDM is transmitted through two array waveguides each capable of performing a demultiplexing function with a resolution corresponding to wavelengths of the optical channels, and a characteristic of sequentially shifting the output ports by one position with shifting of input ports by one position, whereby the wavelength-division multiplexed light beam WDM is separated into a plurality of wavebands WB each including the mutually different optical channels selected from the optical channels included in the wavelength-division multiplexed light beam WDM, and the separated wavebands WB are outputted from the plurality ofType: GrantFiled: April 18, 2007Date of Patent: August 14, 2012Assignees: National University Corporation, Nippon Telegraph and Telephone CorporationInventors: Ken-ichi Sato, Hiroshi Hasegawa, Shoji Kakehashi, Osamu Moriwaki, Shin Kamei, Kenya Suzuki, Yoshihisa Sakai, Kouichi Takiguchi
-
Patent number: 8157454Abstract: A receptacle (20) detachably accommodating a connector plug (34) connected to optical fibers (32) is rotatably supported by a shaft (14) provided in an installation table (10). The receptacle (20) is biased by a leaf spring (16) for biasing opposite ends of the shaft (14) in one direction. A locking/unlocking mechanism for selectively locking or unlocking the receptacle (20) connected with the connector plug (34) relative to the installation table (10) and a locking mechanism fixing portion (12) includes a locking nib (30Ra) of a lock releasing button (30R), a locking nib (30La) of a lock releasing button (30L), locking nib receiving portions (12na, 12nb) and a coil spring (31).Type: GrantFiled: February 1, 2008Date of Patent: April 17, 2012Assignees: Yamaichi Electronics Co., Ltd., Nippon Telegraph and Telephone CorporationInventors: Toshiyasu Ito, Hiromasa Tanobe, Yoshihisa Sakai, Masaru Kobayashi, Ryo Nagase
-
Publication number: 20100074581Abstract: A semiconductor submodule includes a substrate (10) as a first substrate having at least one hole, and at least one optical semiconductor device (16) disposed such that light travels through the hole, a substrate (11) as a second substrate having a semiconductor device (26) for driving the optical semiconductor device (16) and amplifying signals and an electrical connector (28) for inputting and outputting electrical signals from and to the outside, and a flexible cable (12) electrically connecting an end of the substrate (10) and an end of the substrate (11) and allowing the first substrate to be folded opposite to the surface on which the optical semiconductor device is mounted.Type: ApplicationFiled: February 4, 2008Publication date: March 25, 2010Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Hiromasa Tanobe, Yoshihisa Sakai, Masaru Kobayashi, Ryo Nagase
-
Publication number: 20100014813Abstract: A receptacle (20) detachably accommodating a connector plug (34) connected to optical fibers (32) is rotatably supported by a shaft (14) provided in an installation table (10). The receptacle (20) is biased by a leaf spring (16) for biasing opposite ends of the shaft (14) in one direction. A locking/unlocking mechanism for selectively locking or unlocking the receptacle (20) connected with the connector plug (34) relative to the installation table (10) and a locking mechanism fixing portion (12) includes a locking nib (30Ra) of a lock releasing button (30R), a locking nib (30La) of a lock releasing button (30L), locking nib receiving portions (12na, 12nb) and a coil spring (31).Type: ApplicationFiled: February 1, 2008Publication date: January 21, 2010Applicant: YAMAICHI ELECTRONICS CO., LTD.Inventors: Toshiyasu Ito, Hiromasa Tanobe, Yoshihisa Sakai, Masaru Kobayashi, Ryo Nagase
-
Publication number: 20090220234Abstract: A simple optical waveband multiplexer/demultiplexer operable to separate a wavelength-division multiplexed light beam WDM consisting of a plurality of wavebands WB each including a plurality of optical channels, into a predetermined plurality of wavebands WB, and output the separated plurality of wavebands WB from a plurality of output ports, wherein the wavelength-division multiplexed light beam WDM is transmitted through two array waveguides each capable of performing a demultiplexing function with a resolution corresponding to wavelengths of the optical channels, and a characteristic of sequentially shifting the output ports by one position with shifting of input ports by one position, whereby the wavelength-division multiplexed light beam WDM is separated into a plurality of wavebands WB each including the mutually different optical channels selected from the optical channels included in the wavelength-division multiplexed light beam WDM, and the separated wavebands WB are outputted from the plurality ofType: ApplicationFiled: April 18, 2007Publication date: September 3, 2009Applicants: NATIONAL UNIVERSITY CORPORATION NAGOYA UNIVERSITY, NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Ken-ichi Sato, Hiroshi Hasegawa, Shoji Kakehashi, Osamu Moriwaki, Shin Kamel, Kenya Suzuki, Yoshihisa Sakai, Kouichi Takiguchi
-
Publication number: 20090041415Abstract: A double core optical fiber is provided, in which single mode signal light and multimode signal light can be transmitted and a multimode transmission of the signal light guided through the core can be reduced even when the optical fiber is bent. The double core optical fiber of the present invention includes a core (111) arranged on a central axis of the optical fiber and having a refractive index (112), a first cladding (121) arranged on the outer circumference of the core (111) and having a refractive index (122) smaller than the refractive index (112), and a second cladding arranged on the outer circumference of the first cladding (121) and having a refractive index (132) smaller than the refractive index (122).Type: ApplicationFiled: March 23, 2007Publication date: February 12, 2009Applicant: Nippon Telegraph and Telephone CorporationInventors: Hiromasa Tanobe, Yoshihisa Sakai
-
Publication number: 20070015238Abstract: Vectors that encode Adeno-Associated Virus (AAV) Rep and Cap proteins of different serotypes and Adenovirus transcription products that provide helper functions were used to produce pseudotyped recombinant AAV (rAAV) virions. Purification methods generated pseudotyped rAAV virion stocks that were 99% pure with titers of 1×1012?1×1013 vector genomes/ml.Type: ApplicationFiled: June 5, 2003Publication date: January 18, 2007Inventors: Richard Snyder, Sergie Zolotukhin, Yoshihisa Sakai, Barry Byrne, Mark Potter, Irine Zolotukhin, Scott Loiler, Vince Chiodo, Nicholas Muzyczka, William Hauswirth, Terence Flotte, Corinna Burger, Edgardo Rodriguez
-
Patent number: 7120358Abstract: An optical communication equipment comprises shared optical sources 88a–88d to be shared by communication nodes 100a–100d, the wavelengths of optical signals 76a–76d are converted into desired wavelengths ?a–?d according to the addressed information of the corresponding optical label signals 77a–77d by using the shared optical sources 88a–88d, and routed to the addressed communication nodes without being converted into electrical signals by using the wavelength routing function of the cyclic-wavelength arrayed-waveguide grating (AWG) 120. The load of each communication node can be reduced by incorporating the multi-wavelength optical sources, which can be shared among individual communication nodes, into the router 80.Type: GrantFiled: January 13, 2004Date of Patent: October 10, 2006Assignee: Nippon Telegraph and Telephone CorporationInventors: Akira Okada, Kazutoshi Kato, Kazuto Noguchi, Yoshihisa Sakai, Takashi Sakamoto, Morito Matsuoka, Sen-ichi Suzuki
-
Patent number: 7113701Abstract: An optical communication equipment comprises shared optical sources 88a–88d to be shared by communication nodes 100a–100d, the wavelengths of optical signals 76a–76d are converted into desired wavelengths ?a–?d according to the addressed information of the corresponding optical label signals 77a–77d by using the shared optical sources 88a–88d, and routed to the addressed communication nodes without being converted into electrical signals by using the wavelength routing function of the cyclic-wavelength arrayed-waveguide grating (AWG) 120. The load of each communication node can be reduced by incorporating the multi-wavelength optical sources, which can be shared among individual communication nodes, into the router 80.Type: GrantFiled: January 13, 2004Date of Patent: September 26, 2006Assignee: Nippon Telegraph and Telephone CorporationInventors: Akira Okada, Kazutoshi Kato, Kazuto Noguchi, Yoshihisa Sakai, Takashi Sakamoto, Morito Matsuoka, Sen-ichi Suzuki
-
Patent number: 7094604Abstract: Vectors that encode Adeno-Associated Virus (AAV) Rep and Cap proteins of different serotypes and Adenovirus transcription products that provide helper functions were used to produce pseudotyped recombinant AAV (rAAV) virions. Purification methods generated pseudotyped rAAV virion stocks that were 99% pure with titers of 1×1012–1×1013 vector genomes/ml.Type: GrantFiled: March 11, 2004Date of Patent: August 22, 2006Assignee: University of Florida Research Foundation, Inc.Inventors: Richard O. Snyder, Sergei Zolotukhin, Yoshihisa Sakai, Barry J. Byrne, Mark R. Potter, Irine Zolotukhin, Scott Loiler, Vince A. Chiodo, Nicholas Muzyczka, William W. Hauswirth, Terence R. Flotte, Corinna Burger, Edgardo Rodriguez, Kevin R. Nash, Thomas J. Fraites
-
Patent number: 6961169Abstract: A light-controlled light modulator can achieve high-speed, low-loss wavelength conversion. Continuous light with a wavelength ?j is launched into an MMI coupler via a port, and is split into two parts by the MMI coupler, which are led to a loop-type interferometer. In the loop-type interferometer, the two parts travel separately around the loop as clockwise traveling light and counterclockwise traveling light, are combined by the MMI coupler again via a filter-equipped phase modulator, thereby being emitted to the port. In this state, signal light ?i(s) with a wavelength ?i is launched into the filter-equipped phase modulator via a port. Even when the wavelength ?i of the signal light ?i(s) is equal to the wavelength ?j of the wavelength converted output light, the wavelength conversion can be achieved with preventing noise from being mixed into the output light emitted from a port.Type: GrantFiled: April 13, 2004Date of Patent: November 1, 2005Assignee: Nippon Telegraph and Telephone CorporationInventors: Yasuo Shibata, Yasuhiro Suzuki, Yoshihisa Sakai, Yasumasa Suzaki, Akira Okada, Kazuto Noguchi, Rieko Sato
-
Patent number: 6842560Abstract: A part of a wavelength division multiplexed optical signal output from a multiplexing area is extracted as a check signal, and then the extracted signal is guided to a multiplexing area. A reentered check signal is detected at a facet located opposite a facet from which the check signal has been reentered, and the state of the detected check signal is determined. Furthermore at need, on the basis of the result of the determination, a control signal is output that controls operations of a plurality of optical signals input to the multiplexing area.Type: GrantFiled: February 26, 2002Date of Patent: January 11, 2005Assignees: NTT Electronics Corporation, Nippon Telegraph and Telephone CorporationInventors: Yoshiki Yamauchi, Kouichi Fujisaki, Akimasa Kaneko, Takashi Asaoka, Yoshihisa Sakai
-
Publication number: 20040209245Abstract: Vectors that encode Adeno-Associated Virus (AAV) Rep and Cap proteins of different serotypes and Adenovirus transcription products that provide helper functions were used to produce pseudotyped recombinant AAV (rAAV) virions. Purification methods generated pseudotyped rAAV virion stocks that were 99% pure with titers of 1×1012-1×1013 vector genomes/ml.Type: ApplicationFiled: March 11, 2004Publication date: October 21, 2004Inventors: Richard O. Snyder, Sergei Zolotukhin, Yoshihisa Sakai, Barry J. Byrne, Mark R. Potter, Irine Zolotukhin, Scott Loiler, Vince A. Chiodo, Nicholas Muzyczka, William W. Hauswirth, Terence R. Flotte, Corinna Burger, Edgardo Rodriguez, Kevin R. Nash, Thomas J. Fraites
-
Publication number: 20040190809Abstract: A light-controlled light modulator can achieve high-speed, low-loss wavelength conversion. Continuous light with a wavelength &lgr;j is launched into an MMI coupler via a port, and is split into two parts by the MMI coupler, which are led to a loop-type interferometer. In the loop-type interferometer, the two parts travel separately around the loop as clockwise traveling light and counterclockwise traveling light, are combined by the MMI coupler again via a filter-equipped phase modulator, thereby being emitted to the port. In this state, signal light &lgr;i(s) with a wavelength &lgr;i is launched into the filter-equipped phase modulator via a port. Even when the wavelength &lgr;i of the signal light &lgr;i(s) is equal to the wavelength &lgr;j of the wavelength converted output light, the wavelength conversion can be achieved with preventing noise from being mixed into the output light emitted from a port.Type: ApplicationFiled: April 13, 2004Publication date: September 30, 2004Applicant: Nippon Telegraph and Telephone CorporationInventors: Yasuo Shibata, Yasuhiro Suzuki, Yoshihisa Sakai, Yasumasa Suzaki, Akira Okada, Kazuto Noguchi, Rieko Sato
-
Patent number: 6782210Abstract: An optical communication equipment comprises shared optical sources 88a-88d to be shared by communication nodes 100a-100d, the wavelengths of optical signals 76a-76d are converted into desired wavelengths &lgr;a-&lgr;d according to the addressed information of the corresponding optical label signals 77a-77d by using the shared optical sources 88a-88d and routed to the addressed communication nodes without being converted into electrical signals by using the wavelength routing function of the cyclic-wavelength arrayed-waveguide grating (AWG) 120. The load of each communication node can be reduced by incorporating the multi-wavelength optical sources, which can be shared among individual communication nodes, into the router 80.Type: GrantFiled: August 23, 2000Date of Patent: August 24, 2004Assignee: Nippon Telegraph and Telephone CorporationInventors: Akira Okada, Kazutoshi Kato, Kazuto Noguchi, Yoshihisa Sakai, Takashi Sakamoto, Morito Matsuoka, Sen-ichi Suzuki
-
Publication number: 20040146300Abstract: An optical communication equipment comprises shared optical sources 88a-88d to be shared by communication nodes 100a-100d, the wavelengths of optical signals 76a-76d are converted into desired wavelengths &lgr;a-&lgr;d according to the addressed information of the corresponding optical label signals 77a-77d by using the shared optical sources 88a-88d, and routed to the addressed communication nodes without being converted into electrical signals by using the wavelength routing function of the cyclic-wavelength arrayed-waveguide grating (AWG) 120. The load of each communication node can be reduced by incorporating the multi-wavelength optical sources, which can be shared among individual communication nodes, into the router 80.Type: ApplicationFiled: January 13, 2004Publication date: July 29, 2004Applicant: Nippon Telegraph and Telephone CorporationInventors: Akira Okada, Kazutoshi Kato, Kazuto Noguchi, Yoshihisa Sakai, Takashi Sakamoto, Morito Matsuoka, Sen-ichi Suzuki
-
Publication number: 20040141743Abstract: An optical communication equipment comprises shared optical sources 88a-88d to be shared by communication nodes 100a-100d, the wavelengths of optical signals 76a-76d are converted into desired wavelengths &lgr;a-&lgr;d according to the addressed information of the corresponding optical label signals 77a-77d by using the shared optical sources 88a-88d, and routed to the addressed communication nodes without being converted into electrical signals by using the wavelength routing function of the cyclic-wavelength arrayed-waveguide grating (AWG) 120. The load of each communication node can be reduced by incorporating the multi-wavelength optical sources, which can be shared among individual communication nodes, into the router 80.Type: ApplicationFiled: January 13, 2004Publication date: July 22, 2004Applicant: Nippon Telegraph and Telephone CorporationInventors: Akira Okada, Kazutoshi Kato, Kazuto Noguchi, Yoshihisa Sakai, Takashi Sakamoto, Morito Matsuoka, Sen-ichi Suzuki
-
Patent number: 6753996Abstract: A light-controlled light modulator can achieve high-speed, low-loss wavelength conversion. Continuous light with a wavelength &lgr;j is launched into an MMI coupler via a port, and is split into two parts by the MMI coupler, which are led to a loop-type interferometer. In the loop-type interferometer, the two parts travel separately around the loop as clockwise traveling light and counterclockwise traveling light, are combined by the MMI coupler again via a filter-equipped phase modulator, thereby being emitted to the port. In this state, signal light &lgr;i(s) with a wavelength &lgr;i is launched into the filter-equipped phase modulator via a port. Even when the wavelength &lgr;i of the signal light &lgr;i(s) is equal to the wavelength &lgr;j of the wavelength converted output light, the wavelength conversion can be achieved with preventing noise from being mixed into the output light emitted from a port.Type: GrantFiled: September 17, 2001Date of Patent: June 22, 2004Assignee: Nippon Telegraph & Telephone CorporationInventors: Yasuo Shibata, Yasuhiro Suzuki, Yoshihisa Sakai, Yasumasa Suzaki, Akira Okada, Kazuto Noguchi, Rieko Sato
-
Publication number: 20020126341Abstract: A part of a wavelength division multiplexed optical signal output from a multiplexing area is extracted as a check signal, and then the extracted signal is guided to a multiplexing area. A reentered check signal is detected at a facet located opposite a facet from which the check signal has been reentered, and the state of the detected check signal is determined. Furthermore at need, on the basis of the result of the determination, a control signal is output that controls operations of a plurality of optical signals input to the multiplexing area.Type: ApplicationFiled: February 26, 2002Publication date: September 12, 2002Applicant: NTT ELECTRONICS CORPORATION and NIPPON TELEGRAPH AND TELEPHONE CORPORATIONInventors: Yoshiki Yamauchi, Kouichi Fujisaki, Akimasa Kaneko, Takashi Asaoka, Yoshihisa Sakai