Abstract: A structure and a manufacturing method of an optical transmission module, in which output light of each of a first optical transmission unit and a second optical transmission unit is combined into one and transmitted through an optical fiber. In order to manufacture the optical transmission module, the first optical transmission unit and the second optical transmission unit are separately manufactured using a wafer-level packaging process and then are stacked. As a result, emission of generated heat is divided into a first heat sink installed in the first optical transmission unit and a second heat sink installed in the second optical transmission unit so that better heat dissipation efficiency is achieved than a conventional optical transmission module. In addition, a mounting area may also be reduced to ½ of the conventional module.

Abstract: An ultra-small multi-channel optical module according to one embodiment of the present invention includes a base board, a glass substrate, a heat sink, optical elements, parallel light lenses, a first rectangular reflector, a glass cover, a second rectangular reflector, horizontal reflectors, and a light collecting lens.

Abstract: A transmitting apparatus includes an optical modulator configured to modulate input light from a light source into a light signal including a carrier signal and a sideband signal based on a radio frequency (RF) signal, having polarization characteristics crossing each other, an optical power splitter configured to split the light signal into a plurality of light signals, a plurality of light phase shifters configured to respectively shift phases of the plurality of light signals, a plurality of polarization controllers configured to perform control so that a carrier signal and a sideband signal included in each of the phase-shifted plurality of light signals have the same polarization characteristic, and a plurality of photodetectors configured to convert the plurality of light signals, having polarization characteristics controlled by the plurality of polarization controllers, into a plurality of electrical signals and to transfer the electrical signals to a plurality of antenna elements.

Abstract: An ultra-small multi-channel optical module according to one embodiment of the present invention includes a base board, a glass substrate, a heat sink, optical elements, parallel light lenses, a first rectangular reflector, a glass cover, a second rectangular reflector, horizontal reflectors, and a light collecting lens.

Abstract: A transmitting apparatus includes an optical modulator configured to modulate input light from a light source into a light signal including a carrier signal and a sideband signal based on a radio frequency (RF) signal, having polarization characteristics crossing each other, an optical power splitter configured to split the light signal into a plurality of light signals, a plurality of light phase shifters configured to respectively shift phases of the plurality of light signals, a plurality of polarization controllers configured to perform control so that a carrier signal and a sideband signal included in each of the phase-shifted plurality of light signals have the same polarization characteristic, and a plurality of photodetectors configured to convert the plurality of light signals, having polarization characteristics controlled by the plurality of polarization controllers, into a plurality of electrical signals and to transfer the electrical signals to a plurality of antenna elements.

Abstract: A method of mixing video bitstreams and an apparatus performing the method are disclosed. The method includes generating a mixed scalable video coding (SVC) bitstream by mixing a plurality of SVC bitstreams for each layer based on a screen configuration of a user device, extracting a single SVC bitstream corresponding to a single layer from the mixed SVC bitstream based on a reception environment of the user device, and transmitting the single SVC bitstream to the user device.

Abstract: Disclosed herein are an astral lamp device having detachable and angle-controllable LED module blocks and a method of setting the same. The astral lamp device having detachable and angle-controllable LED module blocks, includes a plurality of LED module blocks having one end attached to and disposed on a central frame; and an angle control part configured to control an angle of the LED module block attached to the central frame.

Abstract: An apparatus for monitoring a laser welding bead irradiates a laser to a surface of a welding bead when welding with a laser welding machine, collects a signal reflected from the surface of the welding bead as an image signal, and then extracts at least one feature variable of a bead shape using the collected image signal. Then, the apparatus for monitoring the laser welding bead determines welding defects using the at least one feature variable, and controls an operation of the laser welding machine according to whether or not the welding defects are generated.

Abstract: Provided is a ferrule endface inspecting device for optical communication modules. The ferrule endface inspecting device includes an XY movement stage, a mount head moving in a two-axis direction including an X-axis direction and a Y-axis direction by the XY movement stage and rotating on an X-Y plane, a jig unit disposed under the mount head to fix optical communication modules with a built-in ferrule, and a control unit selecting a ferrule region located at an inspection start position from among a plurality of ferrule regions extracted from a whole image of the jig unit captured by a first camera and analyzing a ferrule endface image obtained through photographing by a second camera, which has rotated and moved to the inspection start position, to determine whether there is a defect of a ferrule endface. The first and second cameras are provided on a side of the mount head.

Abstract: Provided herein is an optical module including: an optical receptacle including a first lens and a second lens; a lens module including a lens unit facing the second lens of the optical receptacle; and an optical element configured to receive a beam emitted from the lens module or form a beam to be emitted to the lens module. A horizontal length and a vertical length of a cross-section of the first lens may differ from each other, and a horizontal length and a vertical length of a cross-section of the second lens may differ from each other.

Abstract: There is provided an optical module. The optical module includes a light source, a wave guide to which beam output from the light source is input, a lens system configured to optically combining the light source and the wave guide, a first lens mount positioned between the light source and the lens system in an optical axis of the light source, a first adhesive configured to fix the lens system to the first lens mount, a second lens mount positioned between the wave guide and the lens system in the optical axis of the light source, and a second adhesive configured to fix the lens system to the second lens mount. Therefore, it is possible to precisely align light, to manufacture the optical module with small expenses, and to simplify processes and equipment.

Abstract: An optical wavelength and optical power measurement device is provided. The optical wavelength and optical power measurement device includes: an input unit in which an optical connector that emits communication light of an infrared ray wavelength region is connected; a filter unit that separates the communication light of an infrared ray wavelength region and light of a visible ray wavelength region; a sensing unit that communicates with a path of the communication light of an infrared ray wavelength region of the filter unit and in which a signal of the communication light of an infrared ray wavelength region is input; and an inspection unit that communicates with a path of the light of the visible ray wavelength region of the filter unit and that inspects a surface of the optical connector.

Abstract: Provided herein is a multi-channel optical module including a plurality of laser diodes emitting light with different wavelengths, a thermoelectric cooling device including the plurality of laser diodes, a TO-can including the thermoelectric cooling device, and a holder combined with the TO-can and including a plurality of optical lenses focusing the light with different wavelengths and a multiplexer gathering focused light into a single optical fiber, wherein the holder has a shape in which the TO-can is cut along an axis of a path of the light with different wavelengths for active alignment of the plurality of optical lenses.

Abstract: There is provided an optical module. The optical module includes a light source, a wave guide to which beam output from the light source is input, a lens system configured to optically combining the light source and the wave guide, a first lens mount positioned between the light source and the lens system in an optical axis of the light source, a first adhesive configured to fix the lens system to the first lens mount, a second lens mount positioned between the wave guide and the lens system in the optical axis of the light source, and a second adhesive configured to fix the lens system to the second lens mount. Therefore, it is possible to precisely align light, to manufacture the optical module with small expenses, and to simplify processes and equipment.

Abstract: Provided herein is a multi-channel optical module including a plurality of laser diodes emitting light with different wavelengths, a thermoelectric cooling device including the plurality of laser diodes, a TO-can including the thermoelectric cooling device, and a holder combined with the TO-can and including a plurality of optical lenses focusing the light with different wavelengths and a multiplexer gathering focused light into a single optical fiber, wherein the holder has a shape in which the TO-can is cut along an axis of a path of the light with different wavelengths for active alignment of the plurality of optical lenses.

Abstract: Disclosed are a bidirectional optical transceiver module and a method of aligning the same. The bidirectional optical transceiver module includes: a package having on one side a cavity; a platform mounted on the package; a transmitter which generates output light; a holder which includes the horizontal portion having the through-hole and disposed on the package to cover the cavity, and the vertical portion which has the inclined surface on one side and the connection hole connected to the through-hole; a receiver which generates an electric signal that corresponds to input light incident into the cavity; and a WDM filter that delivers the output light and the input light.

Abstract: Provided is an apparatus that measures a thickness of a coating by selecting a wavelength of a laser based on a color of the coating using a contactless method using a photoacoustic effect and an interferometer, the apparatus including a pulsed laser source to irradiate a pulsed laser beam toward the coating, a continuous wave (CW) laser source to irradiate a CW laser beam toward the coating, a detector to detect an optical interference signal corresponding to the CW laser beam, and a signal processor to process the optical interference signal to calculate a thickness of the coating.

Abstract: Provided herein is an optical module including: an optical receptacle including a first lens and a second lens; a lens module including a lens unit facing the second lens of the optical receptacle; and an optical element configured to receive a beam emitted from the lens module or form a beam to be emitted to the lens module. A horizontal length and a vertical length of a cross-section of the first lens may differ from each other, and a horizontal length and a vertical length of a cross-section of the second lens may differ from each other.

Abstract: An optical wavelength and optical power measurement device is provided. The optical wavelength and optical power measurement device includes: an input unit in which an optical connector that emits communication light of an infrared ray wavelength region is connected; a filter unit that separates the communication light of an infrared ray wavelength region and light of a visible ray wavelength region; a sensing unit that communicates with a path of the communication light of an infrared ray wavelength region of the filter unit and in which a signal of the communication light of an infrared ray wavelength region is input; and an inspection unit that communicates with a path of the light of the visible ray wavelength region of the filter unit and that inspects a surface of the optical connector.

Abstract: Provided is a livestock house management system for managing a rearing environment of livestock. The livestock house management system includes an environment monitoring sensor unit installed in each of divided zones within a livestock house and configured to measure an environment variable indicating a state of a rearing environment of each of the zones, analyze the measured environment variable, and independently generate a command corresponding to an abnormal situation of each of the zones when the abnormal situation of each of the zones is checked, and a livestock house facility control unit installed in each of the zones and configured to receive the command from the environment monitoring sensor unit installed in a corresponding zone according to a wired or wireless communication scheme, and drive a livestock house facility according to the received command to independently control a rearing environment of each of the zones.