Patents by Inventor Hiromi Kurashima

Hiromi Kurashima 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).

  • OPTICAL TRANSCEIVER INSTALLING MT FERRULE TO MATE WITH MPO CONNECTOR
    Publication number: 20150293315
    Abstract: A pluggable optical transceiver with the CFP type and the MT ferrule is disclosed. The optical transceiver provides in a rear of the optical receptacle a mechanism to push frontward the MT ferrule set in the optical receptacle and to shield the inside of the optical transceiver. Inner fibers connecting the MT ferrule with another MT ferrule assembled with optical devices pass the mechanism, which may be a metal plate with the elastic function and/or a coil spring combined with a holder to hold the MT ferrule.
    Type: Application
    Filed: April 10, 2014
    Publication date: October 15, 2015
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventors: Kazushige OKI, Takashi MATSUI, Kuniyuki ISHII, Hideaki KAMISUGI, Hiromi KURASHIMA, Jignesh SHAH, Lin ZHANG
  • Optical transceiver installing MT ferrule to mate with MPO connector
    Patent number: 9146365
    Abstract: A pluggable optical transceiver with the CFP type and the MT ferrule is disclosed. The optical transceiver provides in a rear of the optical receptacle a mechanism to push frontward the MT ferrule set in the optical receptacle and to shield the inside of the optical transceiver. Inner fibers connecting the MT ferrule with another MT ferrule assembled with optical devices pass the mechanism, which may be a metal plate with the elastic function and/or a coil spring combined with a holder to hold the MT ferrule.
    Type: Grant
    Filed: April 10, 2014
    Date of Patent: September 29, 2015
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kazushige Oki, Takashi Matsui, Kuniyuki Ishii, Hideaki Kamisugi, Hiromi Kurashima, Jignesh Shah, Lin Zhang
  • PLUGGABLE OPTICAL TRANSCEIVER WITH SHIELD FINGER RIGIDLY FIXED TO HOUSING
    Publication number: 20150256260
    Abstract: An optical transceiver to be plugged into a cage of the host system is disclosed. The optical transceiver provides a shield finger that surrounds the optical transceiver and to be in contact with the cage. The shield finger provides a hook including a cut and a tab formed by the cut. The tab is hooked with the top housing of the optical transceiver so as not to interfere the insertion of the optical transceiver into the cage.
    Type: Application
    Filed: March 4, 2015
    Publication date: September 10, 2015
    Inventor: Hiromi KURASHIMA
  • OPTICAL TRANSCEIVER WITH PLUG IN ONE OF PAIRED OPTICAL PORTS
    Publication number: 20150249503
    Abstract: An optical transceiver having a bi-directional optical subassembly (BOSA) and a twin optical port is disclosed. The BOSA is installed with respect to one of the twin port, and a plug is plugged within the other of the twin port. The plug, which is made of resin material, is rigidly set in the other of the twin port and reliably prohibited from slipping out from the port.
    Type: Application
    Filed: March 3, 2015
    Publication date: September 3, 2015
    Inventors: Hidemi Sone, Hiromi Kurashima
  • OPTICAL COUPLING APPARATUS AND OPTICAL TRANSCEIVER INSTALLING THE SAME
    Publication number: 20150185423
    Abstract: A simplified optical coupling system having two optical connectors is disclosed. The optical coupling system includes a male connector with a ferrule, a female connector with another ferrule, and a sleeve to receive the ferrules in respective ends thereof. One of connectors provides a latch and a coil spring. The latch engages with a flange of the other connector, and the coil spring put between the flange of the connector having the latch and a base of the latch to secure the engagement of the latch with the flange.
    Type: Application
    Filed: December 22, 2014
    Publication date: July 2, 2015
    Inventors: Takashi MATSUI, Hiromi KURASHIMA, Masahiro SHIBATA
  • Optical transceiver implementing with flexible printed circuit connecting optical subassembly to circuit board
    Patent number: 9063310
    Abstract: An optical transceiver is disclosed, where the optical transceiver includes an optical subassembly (OSA) with a bottom plate for dissipating heat and connected to an electronic circuit with a flexible printed circuit (FPC). The FPC is soldered with the side electrodes of the OSA as forming a solder fillet in the plane electrode, or the FPC is soldered with the plane electrodes of the OSA as forming the solder fillet in the side electrodes, and leaving a limited room for receiving the curved FPC in peripheries of the OSA.
    Type: Grant
    Filed: April 11, 2012
    Date of Patent: June 23, 2015
    Assignees: Sumitomo Electric Industries, Ltd., Sumitomo Electric Device Innovations, Inc.
    Inventors: Kuniyuki Ishii, Hiromi Kurashima, Michio Suzuki, Nobuyuki Shimizu, Yasushi Fujimura, Noriyuki Hirakata, Toshio Takagi, Toshiaki Kihara
  • Optical transceiver having enhanced EMI tolerance
    Patent number: 9039301
    Abstract: An optical transceiver that attenuates the EMI radiation leaked therefrom is disclosed. The optical transceiver includes a top cover and the bottom base to form a cavity into which a TOSA, a ROSA, and a circuit are set. At least one of the top cover and the bottom base provides a combed structure in a rear portion of the optical transceiver, where the combed structure has a plurality of T-shaped fins to attenuate the EMI radiation.
    Type: Grant
    Filed: January 23, 2013
    Date of Patent: May 26, 2015
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Daisuke Kawase, Kuniyuki Ishii, Hiroyasu Oomori, Hiromi Kurashima
  • Optical transceiver having enhanced EMI tolerance
    Patent number: 9042722
    Abstract: An optical transceiver that reduces the EMI radiation leaked therefrom is disclosed. The optical transceiver includes a top cover and the bottom base to form a cavity into which a TOSA, a ROSA, and a circuit are set. The top cover provides a combed structure in a rear portion thereof, where the combed structure has a plurality of fins with a distance preferably less that quarter wavelength ?/4 of the noise wavelength to be reduced. The combed structure operates as a short stub for the electromagnetic wave traveling longitudinally in the cavity.
    Type: Grant
    Filed: December 16, 2011
    Date of Patent: May 26, 2015
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Hiroyasu Oomori, Daisuke Kawase, Hiromi Kurashima
  • Optical transceiver with finger tightly fastened to housing
    Patent number: 9039300
    Abstract: An optical transceiver easily set within the cage of the host system. The optical transceiver of an embodiment provides a finger surrounding the housing of the optical transceiver. The finger has an rear edge, whose tip is bent downward so as to be received in the first groove of the housing, extending diagonally to the brim of the cage; and a reinforced portion with a U-shaped cross section tightly set within the second groove of the housing.
    Type: Grant
    Filed: July 25, 2012
    Date of Patent: May 26, 2015
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Kondo, Naoto Saito, Hiroshi Kawamura, Hiromi Kurashima
  • OPTICAL TRANSCEIVER ADAPTED TO ANGLED POLISH CONNECTOR AND A METHOD TO ASSEMBLE THE SAME
    Publication number: 20150125120
    Abstract: An optical transceiver adapted to an optical connector having an angled physical contact (APC) is disclosed. The optical transceiver installs an optical sub-assembly to receive an external connector. The optical sub-assembly provides an index surface that indexes the inclined direction of the end of the stub abutting against the end surface of the external connector of the type of the APC. The housing provides a saddle with a flat surface on which the index surface of the optical sub-assembly is set.
    Type: Application
    Filed: November 5, 2014
    Publication date: May 7, 2015
    Inventor: Hiromi Kurashima
  • FULL-DUPLEX OPTICAL TRANSCEIVER APPLICABLE TO DIGITAL COHERENT SYSTEM
    Publication number: 20150104177
    Abstract: An optical transceiver applicable to the coherent communication is disclosed. The optical transceiver includes a laser module, a transmitter module to output a transmitting signal by modulating a phase of an laser beam output from the laser module, and a receiver module to receive a receiving signal modulated in the phase thereof and extract data by multiplying the receiving signal with an laser beam output from the laser module.
    Type: Application
    Filed: October 15, 2014
    Publication date: April 16, 2015
    Inventors: Takatoshi Kato, Kazuhiro Yamaji, Hiromi Kurashima
  • OPTICAL TRANSCEIVER HAVING INNER FIBERS FOR COUPLING OPTICAL RECEPTACLE WITH TRANSMITTER AND RECEIVER MODULES
    Publication number: 20150078760
    Abstract: An optical transceiver that implements an inner fiber to optically connect an optical receptacle with an optical module is disclosed. The optical module in a ceiling thereof forms a gap against a printed circuit board (PCB) electrically connected with the optical module by a flexible printed circuit (FPC) board. The inner fiber is extended in a gap formed between the PCB and the FPC, or between the FPC and the ceiling of the optical module.
    Type: Application
    Filed: September 12, 2014
    Publication date: March 19, 2015
    Inventor: Hiromi Kurashima
  • Optical transceiver
    Patent number: 8967884
    Abstract: An optical transceiver with two circuit boards is disclosed. The optical transceiver includes two OSAs, two circuit boards, and a holder put between two circuit boards. The circuit boards are assembled with the holder made of resin by the snap-in, and this intermediate product is set within the housing of the transceiver. The cover of the transceiver is also assembled by the snap-in without using screws and so on.
    Type: Grant
    Filed: December 2, 2011
    Date of Patent: March 3, 2015
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Kondou, Hiromi Kurashima, Hiroyasu Oomori
  • Optical transceiver having optical receptacle arranged diagonally to longitudinal axis
    Patent number: 8821039
    Abstract: An optical transceiver capable of narrowing an extra space for an external optical fiber is disclosed. The optical transceiver of an embodiment provides an optical receptacle with a port, to which the external optical fiber is to be inserted, headed for a direction in diagonal to the longitudinal axis of the optical transceiver. In another embodiment, the optical transceiver provides an optical receptacle capable of turning the port thereof.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: September 2, 2014
    Assignees: Sumitomo Electric Industries, Ltd., Sumitomo Electric Device Innovations, Inc.
    Inventors: Takashi Matsui, Hiromi Kurashima, Kazushige Oki, Naoyuki Fukushima, Kenichiro Uchida
  • Pluggable optical transceiver having inner optical connection and optical connector installed therein
    Patent number: 8821038
    Abstract: A pluggable optical transceiver is disclosed. The transceiver comprises a plurality of OSAs, an optical member and a plurality of inner fibers to couple the optical member with OSAs. The inner fibers each provides an inner connector to couple with one of OSAs. The housing, which installs the OSAs, the optical member and the inner fiber, is made of metal and has a grooves into which the inner fibers is set so as to arrange them orderly.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: September 2, 2014
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kazushige Oki, Hirokazu Komachi, Hiromi Kurashima
  • PLUGGABLE OPTICAL TRANSCEIVER HAVING PULL-PULL-TAB
    Publication number: 20140219616
    Abstract: A pluggable optical transceiver is disclosed. The optical transceiver provides a pull-tab assembled with a body of the transceiver. The pull-tab comprises a pair of arms and a handle. The arms in an end portion thereof each provides a leg set in a guide formed in the body. Sliding the pull-tab to disengage the optical transceiver from the cage, the leg is slid within the guide to push the end portion of the arm outwardly. The handle provides in an end thereof a bar including a slope. The optical fiber pulled out from the optical connector set in the optical receptacle of the transceiver rides on the slope even when the transceiver is set in the cage by the upside-down arrangement.
    Type: Application
    Filed: February 4, 2014
    Publication date: August 7, 2014
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Kuniyuki Ishii, Hiromi Kurashima
  • Optical module assembled on circuit board via holder
    Patent number: 8727639
    Abstract: An optical transceiver having an optical subassembly electrically connected to a circuit board with an RF connector is disclosed. The optical transceiver further provides a holder for support the RF connector. The circuit board is held by a leg and an arm each being provided in the holder, and putting the circuit board therebetween.
    Type: Grant
    Filed: July 12, 2012
    Date of Patent: May 20, 2014
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Takashi Matsui, Hiromi Kurashima
  • Optical transceiver having effective heat conducting path from TOSA to metal housing
    Patent number: 8672562
    Abstract: An optical transceiver having a effective heat conducting path from the TOSA to the metal housing is disclosed. The TOSA has a bottom member, on which a heat generating device such as TEC is mounted, extending to a direction perpendicular to the longitudinal axis of the metal housing. The optical transceiver further includes a block movably in contact with the bottom member of the TOSA and the inner surface of the metal housing to establish the effective heat conducting path from the TOSA to the metal housing.
    Type: Grant
    Filed: August 17, 2011
    Date of Patent: March 18, 2014
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kuniyuki Ishii, Hiromi Kurashima
  • OPTICAL TRANSCEIVER WITH OPTICAL RECEIVER ELECTRICALLY ISOLATED FROM HOUSING AND OPTICAL TRANSMITTER WITH ENHANCED HEAT DISSIPATION TO HOUSING
    Publication number: 20140010551
    Abstract: An optical transceiver that copes with both the enhanced heat dissipation from heat generating components and the electrical isolation of components processing faint signals from other components generating EMI noises is disclosed. The optical transceiver provides, in addition to a bottom of a frame, a bottom cover made by material with higher thermal conductivity. The former components are directly mounted on the bottom cover through openings in the frame, while, other component to be electrically isolated from the chassis are mounted by putting an insulating support between them and the bottom cover.
    Type: Application
    Filed: July 3, 2013
    Publication date: January 9, 2014
    Inventor: Hiromi KURASHIMA
  • Pluggable optical transceiver having electrically shielded receptacle, and optical connector installed therein
    Patent number: 8579521
    Abstract: A pluggable optical transceiver is disclosed. The optical transceiver includes a resin made optical receptacle to receive an external connector, a housing that provides an area for setting the optical receptacle, and an electrically conductive sheet put between the rear of the optical receptacle and the wall forming the area. The rear wall of the optical receptacle provides a step for receiving a flange of a sleeve assembly set in the optical receptacle.
    Type: Grant
    Filed: May 27, 2011
    Date of Patent: November 12, 2013
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Kazushige Oki, Kuniyuki Ishii, Hiromi Kurashima