Patents by Inventor Jong Hoi Kim

Jong Hoi Kim 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).

  • Publication number: 20130156394
    Abstract: The inventive concept relates to an optical communication module. The optical communication module may include a metal block: an electrical device formed on the metal block; an optical device adhesive block formed on the metal block; an optical device formed on the optical device adhesive block and connected to the electrical device through a bonding interconnection; and a flat type optical waveguide formed on one side of the optical device adhesive block and optically aligned with the optical device.
    Type: Application
    Filed: September 12, 2012
    Publication date: June 20, 2013
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Joong-Seon CHOE, Jong-Hoi Kim, Kwang-Seong Choi, Chun Ju Youn, Duk Jun Kim, Yong-Hwan Kwon, Eun Soo Nam
  • Publication number: 20130114956
    Abstract: Disclosed is a DPSK optical receiver capable of compensating for a polarization phase difference. The DPSK optical receiver according to an embodiment of the present disclosure includes: an optical splitter configured to split a received optical signal into a first optical signal and a second optical signal; an optical delay waveguide configured to delay the first optical signal; a birefringent waveguide configured to delay the second optical signal so as to compensate for a polarization phase difference at an output end; and an optical hybrid configured to generate an optical detection signal corresponding to a phase difference between the delayed first optical signal and the delayed second optical signal.
    Type: Application
    Filed: September 11, 2012
    Publication date: May 9, 2013
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventor: Jong-Hoi Kim
  • Publication number: 20120300180
    Abstract: An image projection apparatus is provided, which includes an illumination unit which generates illumination light, a first prism which receives the illumination light from the illumination unit and performs total reflection of the illumination light, a reflection mirror which receives the illumination light from the first prism and reflects the illumination light, an image forming unit which forms an image from the illumination light that is reflected from the reflection mirror, and a second prism which performs total reflection of the image that is formed by the image forming unit toward a screen.
    Type: Application
    Filed: May 22, 2012
    Publication date: November 29, 2012
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Wook-jae JEON, Jong-hoi KIM
  • Patent number: 8272789
    Abstract: Provided are an adapter assembly and method for compensating optical fibers for a length difference. The adapter assembly includes a first adapter, a second adapter, and a member. The first adapter is configured to be connected to at least one optical communication unit. The second adapter is configured to be connected to at least another optical communication unit and be coupled to the first adapter. The member is configured to be interposed between the first and second adapters for providing an optical signal transmission path between the optical communication units. Owing to the member, a length difference between optical fibers can be compensated for.
    Type: Grant
    Filed: May 26, 2010
    Date of Patent: September 25, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Joong-Seon Choe, Yong-Hwan Kwon, Chun Ju Youn, Jong-Hoi Kim, Kwang-Seong Choi, Eun Soo Nam
  • Publication number: 20120155887
    Abstract: Disclosed are a method and an apparatus for transmitting and receiving coherent optical OFDM.
    Type: Application
    Filed: November 22, 2011
    Publication date: June 21, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Chun Ju YOUN, Yong-Hwan Kwon, Duk Jun Kim, Jong-Hoi Kim, Joong-Seon Choe, Kwang-Seong Choi, Eun Soo Nam
  • Publication number: 20120155875
    Abstract: Disclosed is an optical receiver including: a polarization splitter splitting two polarization components perpendicular to each other from an optical signal to output a first polarization signal and a second polarization signal; a first optical delay splitter and a second optical delay splitter branching each polarization signal to output two branch signals, respectively; a first optical hybrid and a second optical hybrid each outputting four interference signals in which a phase shift increases by each 90° by using the two branch signals; and four photo detectors each outputting a differential signal between two interference signals in which the phase shift is 180° .
    Type: Application
    Filed: November 22, 2011
    Publication date: June 21, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventor: Jong-Hoi KIM
  • Publication number: 20120132792
    Abstract: An exemplary embodiment of the present disclosure provides an optical module including: an optical hybrid including a metal optical waveguide; a photo detector configured to receive light; and a platform including an optical hybrid supporting section for supporting the optical hybrid, a photo detector supporting section for supporting the photo detector, and an inclined surface configured to change a propagation direction of light emitted from the optical hybrid, and configured to combine the optical hybrid and the photo detector.
    Type: Application
    Filed: October 21, 2011
    Publication date: May 31, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Joong-Seon Choe, Jong-Hoi Kim, Chun Ju Youn, Duk Jun Kim, Kwang-Seong Choi, Yong-Hwan Kwon, Eun Soo Nam
  • Publication number: 20120114293
    Abstract: The present disclosure relates to a planar optical waveguide element, and more particularly, to an optical waveguide end structure for effective optical signal connection with a light source, a light receiving element, or a different type of optical waveguide element. According to an exemplary embodiment of the present disclosure, there is disclosed an optical waveguide structure, including: a planar optical waveguide including a lower clad, a waveguide core formed on the lower clad, and a clad layer formed on the waveguide core; and an optical lens formed on a surface of the clad layer. One end of the optical waveguide forms an inclined surface having a predetermined inclination angle.
    Type: Application
    Filed: September 30, 2011
    Publication date: May 10, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Joong-Seon Choe, Duk Jun Kim, Chun Ju Youn, Jong-Hoi Kim, Kwang-Seong Choi, Yong-Hwan Kwon, Eun Soo Nam
  • Publication number: 20110304826
    Abstract: An illuminating unit and a display apparatus including the illuminating unit are provided. The illuminating unit generates and emits light to a display element of the display apparatus, and includes a light source; a uniformizing unit which uniformizes light from the light source and includes a plurality of uniformizing lenses arranged on an optical path; a condensing unit which condenses light from the uniformizing unit to emit the light to the display element and includes a plurality of condensing lenses sequentially arranged on the optical path, and the uniformizing unit and the condensing unit are arranged based on a width of one of a plurality of cell lenses forming the uniformizing lens and a width of an image displayed in the display element.
    Type: Application
    Filed: June 3, 2011
    Publication date: December 15, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kee-uk JEON, Sung-tae KIM, Jeong-ho NHO, Won-yong LEE, Kyoung-choul JANG, Seok-chan HONG, Jong-hoi KIM
  • Publication number: 20110142398
    Abstract: Provided are an adapter assembly and method for compensating optical fibers for a length difference. The adapter assembly includes a first adapter, a second adapter, and a member. The first adapter is configured to be connected to at least one optical communication unit. The second adapter is configured to be connected to at least another optical communication unit and be coupled to the first adapter. The member is configured to be interposed between the first and second adapters for providing an optical signal transmission path between the optical communication units. Owing to the member, a length difference between optical fibers can be compensated for.
    Type: Application
    Filed: May 26, 2010
    Publication date: June 16, 2011
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Joong-Seon Choe, Yong-Hwan Kwon, Chun Ju Youn, Jong-Hoi Kim, Kwang-Seong Choi, Eun Soo Nam
  • Publication number: 20110135319
    Abstract: Provided is an optical OFDM receiver. The optical OFDM receiver receives an optical signal dependent on the nonlinearity of a transmitter. The optical OFDM receives includes an optical down converter, a nonlinearity compensator, and an OFDM demodulator. The optical down converter converts the optical signal into an electrical signal. The nonlinearity compensator filters the electrical signal, for compensating distortion which is added to the optical signal when the transmitter performs optical modulation. The OFDM demodulator demodulates the distortion-compensated electrical signal in an OFDM scheme.
    Type: Application
    Filed: May 4, 2010
    Publication date: June 9, 2011
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Chun Ju YOUN, Yong-Hwan Kwon, Eun Soo Nam, Jong-Hoi Kim, Joong-Seon Choe, Kwang-Seong Choi
  • Publication number: 20110096855
    Abstract: Provided is a polarization division multiplexed optical OFDM transmitter. The polarization division multiplexed optical OFDM transmitter includes a data demultiplexer, a training symbol generation unit and an optical up-converter and polarization division multiplexing unit. The data demultiplexer divides a transmission signal into a plurality of groups. The training symbol generation unit allocates a plurality of training symbols for each OFDM data which is included in the respective multiplexed groups, and allocates repetitive data in a time domain for the respective training symbols for data of 0 to periodically appear for the respective training symbols in a frequency domain. The optical up-converter and polarization division multiplexing unit performs optical frequency band conversion and polarization division multiplexing on an output of the training symbol generation unit to output a polarization division multiplexed optical OFDM signal corresponding to a plurality of polarization components.
    Type: Application
    Filed: May 3, 2010
    Publication date: April 28, 2011
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Chun Ju YOUN, Yong-Hwan Kwon, Jong-Hoi Kim, Joong-Seon Choe, Kwang-Seong Choi, Kyoungwoo Heo, Eun Soo Nam
  • Publication number: 20110064422
    Abstract: Provided is an optical receiver used for an optical communication system, more particularly, a polarization split-phase shift demodulation coherent optical receiver. An optical hybrid includes a first optical splitter, a phase shift waveguide, a second optical splitter, and an optical coupler. The first optical splitter splits a first input optical signal to output first output optical signals. The phase shift waveguide receives the first output optical signals and controls and outputs the first output optical signals such that the first output optical signals have different phases. The second optical splitter splits a second input optical signal to output a plurality of second output optical signals. The optical coupler couples the first output optical signals one-to-one with the second output optical signals, respectively.
    Type: Application
    Filed: April 22, 2010
    Publication date: March 17, 2011
    Applicant: ELECTRONICS AND ELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Jong-Hoi Kim, Eun Soo Nam, Yong-Hwan Kwon, Chun Ju Youn, Joong-Seon Choe, Kwang-Seong Choi
  • Publication number: 20110002583
    Abstract: Provided is an optical device. The optical device includes a multiplexer/demultiplexer, a multimode interference (MMI) coupler, a first waveguide, and second waveguides. The multiplexer/demultiplexer splits optical signals having a plurality of channels and received through a first port according to their wavelength to provide the split optical signals to second ports, or providing input optical signals having wavelengths difference from each other and received through the second ports to the first port. The multimode interference (MMI) coupler is connected to the first port. The first waveguide is connected to the MMI coupler. The second waveguides are connected to the second ports. The MMI coupler has a width decreasing toward the multiplexer/demultiplexer.
    Type: Application
    Filed: April 21, 2010
    Publication date: January 6, 2011
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Oh-Kee Kwon, Chul-Wook Lee, Dong-Hun Lee, Jong-Hoi Kim, Eundeok Sim, Yongsoon Baek
  • Patent number: 7828448
    Abstract: An illumination unit and an image projection apparatus employing the same. The illumination unit includes: a first reflective surface reflecting light incident thereon; a light-emitting device generating and emitting illuminating light; and a second reflective surface reflecting light emitted from the light-emitting device to a light source surface that includes the light-emitting device.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: November 9, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jong-hoi Kim, Won-yong Lee, Young-chol Lee, Kye-hoon Lee
  • Patent number: 7782909
    Abstract: Provided is a frequency-tunable terahertz light source device. The frequency-tunable terahertz light source device satisfies a Littrow diffraction condition at a wavelength and simultaneously satisfies a Littman-Metcalf diffraction condition at another wavelength using a double diffraction grating having two grating periods. Thus, oscillations simultaneously occur at the two different wavelengths, such that a terahertz wave can be stably generated by beating of the two oscillation wavelengths. In addition, the frequency-tunable terahertz light source device can readily change a frequency up to several terahertz and can be fabricated in a small size.
    Type: Grant
    Filed: August 15, 2008
    Date of Patent: August 24, 2010
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kwang Ryong Oh, Jong Hoi Kim, Dong Churl Kim, Oh Kee Kwon, Ki Soo Kim, Ki Hong Yoon
  • Publication number: 20100158524
    Abstract: Provided is an upstream source light generator of a passive optical network (PON) system. The upstream source light generator includes an amplification part configured to amplify injection light, and a reflection part configured to receive the amplified injection light and generate reflection light by reflecting the amplified injection light with different optical delays according to wavelengths of the amplified injection light.
    Type: Application
    Filed: August 18, 2009
    Publication date: June 24, 2010
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Oh-Kee KWON, Yongsoon Baek, Chul-Wook Lee, Jong-Hoi Kim, Eundeok Sim, Dong-Hun Lee
  • Publication number: 20100142889
    Abstract: An optical interleaver of a wavelength division multiplexing (WDM) system includes an optical coupler, first and second waveguides, a high reflection mirror, and first and second phase shifters. The coupler divides an input optical signal. The first waveguide branches off from the coupler in a first direction. The second waveguide branches off from the coupler in a second direction for providing an optical path different from that provided by the first waveguide. The high reflection mirror is disposed at an end of the first waveguide for reflecting a first optical signal incident onto the first waveguide. The first phase shifter is disposed at an end of the second waveguide for multiple-reflecting a second optical signal incident onto the second waveguide. The second phase shifter is disposed at the first or second waveguide for adjusting an optical path difference between the first and second waveguides by varying its refractive index.
    Type: Application
    Filed: August 19, 2009
    Publication date: June 10, 2010
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Oh-Kee KWON, Yongsoon BAEK, Chul-Wook LEE, Dong-Hun LEE, Jong-Hoi KIM, Eundeok SIM
  • Patent number: 7561603
    Abstract: Provided is an integrated semiconductor light source using locking characteristic by an external light injection, including: an active region controlling an optical gain and an optical output by current injection; and a passive region having a structure integrated with the active region and moving a cavity mode by current injection or voltage application to lock injection light.
    Type: Grant
    Filed: July 7, 2005
    Date of Patent: July 14, 2009
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Oh Kee Kwon, Kwang Ryong Oh, Kang Ho Kim, Jong Hoi Kim, Hyun Soo Kim
  • Publication number: 20090154923
    Abstract: Provided is a wavelength selective switch (WSS), and more particularly, a wavelength selective switch for electrically switching a wavelength without physical displacement. The wavelength selective switch includes an optical demultiplexer for dividing an input optical signal into signals having wavelengths corresponding to respective channels, selecting either the optical signal of each channel obtained by dividing the input optical signal or an optical signal input via an add port, and outputting the selected optical signal; and an optical multiplexer including an optical deflecting unit for individually deflecting the optical signals of the respective channels received from the optical demultiplexer according to supplied current or applied voltage, wherein the optical signal of each channel deflected by the optical deflecting unit is output to a specific output port.
    Type: Application
    Filed: September 11, 2008
    Publication date: June 18, 2009
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Oh Kee KWON, Yong Soon Baek, Jang Uk Shin, Young Tak Han, Dong Hun Lee, Chul Wook Lee, Eun Deok Sim, Jong Hoi Kim, Sang Pil Han, Sang Ho Park