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公开(公告)号：US20200186247A1
公开(公告)日：2020-06-11
申请号：US16699964
申请日：2019-12-02
Inventor： Hyun Seo KANG , Chan Il YEO , Young Soon HEO , Kye Eun KIM , Sung Chang KIM , Ji Hyoung RYU , Si Woong PARK , Keo Sik KIM , Gi Hyeon MIN , Hyoung Jun PARK , Dong Hoon SON , Mun Seob LEE
IPC: H04B10/112 , H04B10/40
Abstract: A wireless optical communication apparatus for performing bi-directional optical transmission in a free space includes a first optical system configured to transmit data through a downlink scheme and a second optical system configured to receive the data from the first optical system and transmit a control signal to the first optical system through an uplink scheme, wherein each of the first optical system and the second optical system transmits and receives the data and the control signal through a single port.
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2.发明申请公开(公告)号：US20210063656A1
公开(公告)日：2021-03-04
申请号：US17002391
申请日：2020-08-25
Inventor： Young Soon HEO , Sung Chang KIM , Hyun Seo KANG , Chan Il YEO , Ji Hyoung RYU , Si Woong PARK , Kye Eun KIM , Keo Sik KIM , Jeong Eun KIM , Gi Hyeon MIN , Hyoung Jun PARK , Dong Hoon SON , Mun Seob LEE
IPC: G02B6/42 , H04B10/112 , H04B10/66 , H04B10/58
Abstract: Provided are an apparatus and method for adjusting an optical axis. In the apparatus, an iris diaphragm and a quadrant photodiode (QPD) are used to align optical axes of an optical system of the apparatus so that optical transmission efficiency between an optical transmitter and an optical receiver can be increased. Since a hole of the iris diaphragm can be adjusted to be small, a beam larger than a light-receiving area of the QPD can be included in the light-receiving area, and optical axis alignment is facilitated accordingly. When the QPD and the iris diaphragm are applied to the apparatus, it is possible to simultaneously perform data transmission, tracking, and optical axis alignment. An optical fiber end surface and optical axes of lenses arranged in parallel are aligned in the apparatus so that alignment between two terminals can be easy and reception efficiency can be increased.
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公开(公告)号：US20180100978A1
公开(公告)日：2018-04-12
申请号：US15581852
申请日：2017-04-28
Inventor： Jeong Eun KIM , Hyun Seo KANG , Keo Sik KIM , Sung Chang KIM , Young Sun KIM , Ji Hyoung RYU , Hyoung Jun PARK , Dong Hoon SON , Chan Il YEO , Young Soon HEO
CPC classification number: G02B6/4226 , G02B6/32 , G02B6/4204 , G02B6/4225 , G02B6/4227 , G02B6/425 , G02B6/4263 , G02B6/4271 , G02B6/4284
Abstract: Provided are a multi-channel optical subassembly structure allowing an optical unit including a light source photodetector chip to be fixed through an alignment jig after active alignment is performed on an individual or single light source photodetector chip by using the alignment jig capable of electrical coupling and one electrode pad and the other electrode pad of a thermoelectric element, which are wire-bonded, capable of performing active alignment for each light source photodetector chip, that is, for each channel, capable of replacing the optical unit and the alignment jig when a problem occurs in some or all channels, capable of improving optical coupling efficiency for each channel, and capable of addressing a time-consuming and economically expensive work in which an optical subassembly is discarded when some channels fail, and a method of packaging the structure.
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Patent Agency Ranking
公开(公告)号：US20210208535A1
公开(公告)日：2021-07-08
申请号：US16825571
申请日：2020-03-20
Inventor： Gi Hyeon MIN , Keo Sik KIM , Hyun Seo KANG , Kye Eun KIM , Sung Chang KIM , Ji Hyoung RYU , Si Woong PARK , Hyoung Jun PARK , Dong Hoon SON , Chan Il YEO , Dong Soo LEE , Byung Tak LEE , Young Soon HEO
Abstract: Provided are a system and method for digital holographic imaging which are not affected by external vibrations. The system for digital holographic imaging includes a light source and optical system section configured to split generated beams and including a sample through which the beams pass, a lens, and a grating disposed behind the lens; an object signal acquisition section configured to receive the split beams and acquire an interference signal; and an image processor configured to acquire a three-dimensional (3D) image of an object by using the acquired interference signal.
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公开(公告)号：US20180088378A1
公开(公告)日：2018-03-29
申请号：US15499392
申请日：2017-04-27
Inventor： Hyoung Jun PARK , Hyun Seo KANG , Keo Sik KIM , Sung Chang KIM , Young Sun KIM , Jeong Eun KIM , Hee Seung KIM , Ji Hyoung RYU , Dong Hoon SON , Chan Il YEO , Young Soon HEO
IPC: G02F1/1347 , G02F1/13363 , G02F1/135 , G02F1/1335 , G01J4/00
CPC classification number: G02F1/13473 , G02F1/0136 , G02F2001/0142 , G02F2201/58
Abstract: Disclosed is a polarimetric-analysis-type dual liquid crystal (LC) wavelength filter module capable of miniaturization or optical integration in the form of a package. The polarimetric-analysis-type dual liquid crystal (LC) wavelength filter module includes a beam displacer disposed on a propagation path of light of an unpolarized light source for emitting unpolarized light and configured to generate two orthogonal polarization components corresponding to two polarization axes from the light of the unpolarized light source such that the polarization components are separated at a predetermined angle, a half-wavelength retarder disposed apart at a rear end of the beam displacer along the light propagation path, and a dual LC wavelength-tunable filter having two LC wavelength-tunable filters that overlap with a gap therebetween to detect light intensities of first polarized light of a Transverse Electric (TE) mode that is directly delivered from the beam displacer and second polarized light of the TE mode that is transmitted through or via the half-wavelength retarder and then converted.
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公开(公告)号：US20200310029A1
公开(公告)日：2020-10-01
申请号：US16741151
申请日：2020-01-13
Inventor： Hyun Jin KIM , Hyoung Jun PARK , Sung Chang KIM , Kye Eun KIM , Ji Hyoung RYU , Gi Hyeon MIN , Si Woong PARK , Dong Hoon SON , Chan Il YEO
Abstract: A multi-channel receiver optical sub assembly module for a fiber Bragg grating sensor according to an embodiment of the present invention includes a housing, a connection socket, an optical bench, a thermoelectric cooler, an arrayed waveguide grating chip, a photodiode array disposed on the optical bench and including a plurality of photodiode chips connected to the optical channels of the arrayed waveguide grating chip, and a printed circuit board which is connected to the other side of the housing while passing through the other side of the housing, of which a portion of a body is disposed on the optical bench, and which is connected to the photodiode array.
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公开(公告)号：US20180128978A1
公开(公告)日：2018-05-10
申请号：US15804653
申请日：2017-11-06
Inventor： Hyun Seo KANG , Eun Kyoung JEON , Jaisang KOH , Keo-Sik KIM , Sung Chang KIM , Jeong Eun KIM , Ji Hyoung RYU , Hyoungjun PARK , Dong Hoon SON , Chan Il YEO , Dongsoo LEE , Seihyoung LEE , Young Soon HEO
CPC classification number: G02B6/12009 , G02B27/00 , H04J14/0202 , H04J14/0215 , H04J14/022 , H04J14/0256
Abstract: Disclosed is a multi-wavelength transmission apparatus including a wavelength divider to divide an optical signal by wavelength and output wavelength-divided optical signals to different positions, the optical signal being received from an optical circulator, a first cylindrical lens to diverge the wavelength-divided optical signals along an X axis and a Y axis and allow the wavelength-divided optical signals to be promoted in a Z-direction, a second cylindrical lens to diverge optical signals output from the first cylindrical lens along the X axis and the Y axis and allow the output optical signals to be promoted in the Z-direction, and a reflector to reflect optical signals output from the second cylindrical lens toward the second cylindrical lens, the first cylindrical lens being identical in shape to the second cylindrical lens and rotated by 90° in an Y-axial direction based on the second cylindrical lens.
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公开(公告)号：US20180081131A1
公开(公告)日：2018-03-22
申请号：US15709247
申请日：2017-09-19
Inventor： Young Soon HEO , Hyun Seo KANG , Keo Sik KIM , Sung Chang KIM , Young Sun KIM , Jeong Eun KIM , Hee Seung KIM , Ji Hyoung RYU , Hyoung Jun PARK , Dong Hoon SON , Chan Il YEO
IPC: G02B6/42
CPC classification number: G02B6/423 , G02B6/4244 , G02B6/4249 , G02B6/425 , G02B6/428
Abstract: Provided is a multi-channel optical subassembly. The multi-channel optical subassembly includes a first sub-mount including first and second areas having different thicknesses, a photoelectric device provided in the first area, a circuit board provided in the second area, a second sub-mount inserted into and fastened to the first guide hole and coupled to the first sub-mount, an optical fiber array fixed to the second sub-mount to provide a path through which light emitted from the photoelectric device is received or transferred, and a micro-lens array mounted on the second sub-mount. The first guide hole is provided in one of the first and second areas. The micro-lens array includes a lens collecting the light between the photoelectric device and the optical fiber array.
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