Patents by Inventor June-Hyeon Ahn

June-Hyeon Ahn 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: 20050147360
    Abstract: A vertical cavity surface emitting laser (VCSEL) module includes a substrate provided with an etched region formed on a lower surface thereof, a plurality of layers, for photoproduction, laminated on an upper surface of the substrate, and a VCSEL for emitting the light upwards and downwards, wherein the VCSEL module monitors the output of the VCSEL by detecting the light emitted downwards from the VCSEL.
    Type: Application
    Filed: August 19, 2004
    Publication date: July 7, 2005
    Inventors: Kyu-Sub Kwak, Young-Min Lee, June-Hyeon Ahn
  • Publication number: 20050006654
    Abstract: A semiconductor monolithic integrated optical transmitter including a plurality of active layers formed on a semiconductor substrate is disclosed, which comprises: a distributed feedback laser diode including a grating for reflecting light with a predetermined wavelength and a first active layer for oscillating received light from the grating; an electro-absorption modulator including a second active layer for receiving light from the first active layer, wherein the received light intensity is modulated through a change of absorbency in accordance with an applied voltage; an optical amplifier including a third active layer for amplifying received light from the second active layer; a first optical attenuator between the first active layer and the second active layer; and a second optical attenuator between the second active layer and the third active layer.
    Type: Application
    Filed: November 19, 2003
    Publication date: January 13, 2005
    Inventors: Byung-Kwon Kang, Shi-Yun Cho, In Kim, Do-Young Rhee, Tae-Il Kim, Dong-Hoon Jang, Seung-Won Lee, Duk-Ho Jeon, June-Hyeon Ahn, Young-Min Lee, Jong-Ryeol Kim
  • Publication number: 20040264871
    Abstract: A coupling structure for coupling an optical waveguide and an optical device is provided. The coupling structure enables to precisely align the optical waveguide and the optical device so that an optical-alignment error can be reduced within a range of a few &mgr;m. The coupling structure includes a first substrate, at least one optical waveguide formed on the first substrate to transmit an optical signal, optical alignment dummy waveguides symmetrically aligned on the first substrate about the optical waveguide, a second substrate bonded to the first substrate, at least one optical device mounted on a bottom surface of the second substrate and optically connected to the optical waveguide, and optical-alignment patterns formed at the bottom surface of the second substrate corresponding to the optical alignment dummy waveguides, wherein an optical alignment for the optical waveguide and the optical device is achieved by aligning the optical alignment dummy waveguides with the optical-alignment patterns.
    Type: Application
    Filed: October 10, 2003
    Publication date: December 30, 2004
    Inventors: Young-Min Lee, June-Hyeon Ahn, Kyu-Sub Kwak
  • Publication number: 20040161000
    Abstract: An optical communication module is disclosed. The optical communication module includes a thermistor, which may be plate shaped, having a positive temperature coefficient. The resistance of the thermistor increases according to an increase of the environmental temperature. The optical communication module also includes a semiconductor chip mounted on the upper surface of the thermistor, and a driving means for applying a predetermined voltage to the thermistor.
    Type: Application
    Filed: September 18, 2003
    Publication date: August 19, 2004
    Inventors: Byung-Kwon Kang, Seung-Won Lee, June-Hyeon Ahn, Shi-Yun Cho
  • Publication number: 20030138199
    Abstract: A filter device for transmitting an optical signal using multiple wavelengths is disclosed. The filter device includes a fixation unit fixed to a substrate, a rotation unit having a filter rotatably installed on the fixation unit, and a control means for obtaining a predetermined wavelength by controlling the rotation angle of the filter through gear combinations corresponding positions of the fixation unit and the rotation unit. The alignment and fixation of the filter are controlled simultaneously through the gearing combinations between the gear teeth on the guide rib of the rotation unit and the teeth of the spur gear fixed to the bolt.
    Type: Application
    Filed: January 6, 2003
    Publication date: July 24, 2003
    Inventor: June-Hyeon Ahn