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公开(公告)号：US11500150B2
公开(公告)日：2022-11-15
申请号：US17173681
申请日：2021-02-11
Inventor： Joong-Seon Choe , Duk Jun Kim , Jong-Hoi Kim , Jonghyurk Park , Won Seok Han
Abstract: Provided is a waveguide photodetector including a semiconductor substrate, a first optical waveguide and a second optical waveguide, which are sequentially laminated on the semiconductor substrate, in which each of the first optical waveguide and the second optical waveguide includes a first portion and a second portion, and the first portion extends from the second portion in a first direction parallel to a top surface of the semiconductor substrate, a refractive index matching layer disposed on the second portion of the second optical waveguide, a clad layer disposed on the refractive index matching layer, and an absorber disposed between the refractive index matching layer and the clad layer. Here, the second optical waveguide has a first conductive-type, the clad layer has a second conductive-type opposite to the first conductive-type, and the refractive index matching layer includes a first semiconductor layer that is an intrinsic semiconductor layer.
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公开(公告)号：US20240168307A1
公开(公告)日：2024-05-23
申请号：US18516066
申请日：2023-11-21
Inventor： Kap Joong KIM , Chun Ju Youn , Young-Ho Ko , Minchul Kim , Seong Su Park , Kyongchun Lim , Byung-seok Choi , Joong-Seon Choe , Won Seok Han
IPC: G02B27/28
CPC classification number: G02B27/283 , G02B27/286
Abstract: Disclosed is a polarized light generating device based on an optical waveguide, which includes first to fourth input optical waveguides, respectively, for receiving input light from an outside, first to fifth optical splitters configured to receive at least one light and output the received at least one light as at least one light, and an optical converter configured to receive at least one light from the fifth optical splitter and convert the received light to generate polarized light. The polarized light generating device receives the input light through one of the first to fourth input optical waveguides, and generates a first polarized light, a second polarized light, a third polarized light, and a fourth polarized light. The first to fourth polarized lights belong to elements of two arbitrary two-dimensional mutually unbiased basis sets.
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公开(公告)号：US11594656B2
公开(公告)日：2023-02-28
申请号：US17075966
申请日：2020-10-21
Inventor： Young-Ho Ko , Kap-Joong Kim , Byung-seok Choi , Won Seok Han
Abstract: Disclosed are a quantum light source and an optical communication apparatus including the same. The quantum light source device includes a vertical reflection layer disposed on a substrate, a lower electrode layer disposed on the vertical reflection layer, a horizontal reflection layer disposed on the lower electrode layer, a quantum light source disposed in the horizontal reflection layer, and an upper electrode layer disposed on the horizontal reflection layer.
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公开(公告)号：US10291327B1
公开(公告)日：2019-05-14
申请号：US15855825
申请日：2017-12-27
Inventor： O-Kyun Kwon , Namje Kim , Miran Park , Shinmo An , Won Seok Han
IPC: H04B10/07 , H04B10/40 , H04B10/50 , H04B10/54 , H04B10/60 , H04B10/077 , H04B10/2575
Abstract: An optical signal generating apparatus according to an embodiment of the inventive concept includes a first optical intensity modulator for modulating a first optical signal to generate a 2N-level (where N is a positive integer) second optical signal in the form of a binary signal, a first optical amplifier for amplifying the second optical signal to generate a third optical signal, and a second optical intensity modulator for modulating the third optical signal to generate a 2N+1-level fourth optical signal in the form of a binary signal. The optical signal generating apparatus according to an embodiment of the inventive concept may generate a low-cost, high-quality optical signal by using an optical device to generate a multi-level optical signal. Additionally, the optical signal generating apparatus according to an embodiment of the inventive concept may generate a multi-level optical signal by sequentially performing optical modulation and optical amplification operations.
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公开(公告)号：US20230073881A1
公开(公告)日：2023-03-09
申请号：US17852173
申请日：2022-06-28
Inventor： Hyun Soo KIM , Duk Jun Kim , Dong-Young Kim , Ho Sung Kim , Youngsoon Baek , Jang Uk Shin , Young-Tak Han , Won Seok Han
Abstract: Disclosed are a Mach-Zehnder interferometric optical modulator and a method for manufacturing the same. The modulator includes first and second lower clad layers, a core layer, an upper clad layer, a waveguide, and electrodes. The waveguide may include an input waveguide, a waveguide divider, branch waveguides, and a waveguide combiner. Each of the branch waveguides includes first and second connection regions connected to the waveguide combiner and the waveguide divider, respectively, and a phase shift region having a cross-section of a reverse mesa structure that has an upper width that is the same as widths of the first and second connection regions and a lower width that is smaller than the widths of the first and second connection regions.
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Patent Agency Ranking
公开(公告)号：US08987037B2
公开(公告)日：2015-03-24
申请号：US13841772
申请日：2013-03-15
Inventor： Yong-Duck Chung , Dae-Hyung Cho , Won Seok Han
CPC classification number: H01L31/186 , C23C14/5853 , C23C14/5866 , H01L21/02485 , H01L21/02491 , H01L21/02502 , H01L21/02554 , H01L21/02557 , H01L21/02614 , H01L31/0749 , H01L31/1828 , H01L31/1864 , Y02E10/50 , Y02E10/541 , Y02E10/543 , Y02P70/521
Abstract: A method of manufacturing a solar cell includes forming a buffer layer between an optical absorption layer and a window electrode layer. Forming the buffer layer includes depositing a metal material on the optical absorption layer, supplying a non-metal material on the optical absorption layer, supplying a gas material including oxygen atoms on the optical absorption layer, and reacting the metal material with the non-metal material. The gas material reacts with the metal material and the non-metal material to form a metal sulfur oxide on the optical absorption layer.
Abstract translation: 太阳能电池的制造方法包括在光吸收层和窗电极层之间形成缓冲层。 形成缓冲层包括在光吸收层上沉积金属材料，在光吸收层上提供非金属材料，在光吸收层上提供包含氧原子的气体材料，并使金属材料与非金属材料反应 材料。 气体材料与金属材料和非金属材料反应，以在光吸收层上形成金属硫氧化物。
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公开(公告)号：US12072600B2
公开(公告)日：2024-08-27
申请号：US17852173
申请日：2022-06-28
Inventor： Hyun Soo Kim , Duk Jun Kim , Dong-Young Kim , Ho Sung Kim , Yongsoon Baek , Jang Uk Shin , Young-Tak Han , Won Seok Han
Abstract: Disclosed are a Mach-Zehnder interferometric optical modulator and a method for manufacturing the same. The modulator includes first and second lower clad layers, a core layer, an upper clad layer, a waveguide, and electrodes. The waveguide may include an input waveguide, a waveguide divider, branch waveguides, and a waveguide combiner. Each of the branch waveguides includes first and second connection regions connected to the waveguide combiner and the waveguide divider, respectively, and a phase shift region having a cross-section of a reverse mesa structure that has an upper width that is the same as widths of the first and second connection regions and a lower width that is smaller than the widths of the first and second connection regions.
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公开(公告)号：US11018475B2
公开(公告)日：2021-05-25
申请号：US16561420
申请日：2019-09-05
Inventor： Namje Kim , O-Kyun Kwon , Miran Park , Tae-Soo Kim , Shinmo An , Won Seok Han
Abstract: Provided is a quarter-wavelength shifted distributed feedback laser diode. The laser diode includes a substrate having a laser diode section and a phase adjustment section, a waveguide layer on the substrate, a clad layer on the waveguide layer, a grating disposed in the clad layer in the laser diode section, an anti-reflection coating disposed on one side walls, of the substrate, the waveguide layer, and the clad layer, adjacent to the laser diode section, and a high reflection coating disposed on the other side walls, of the substrate, the waveguide layer, and the clad layer, adjacent to the phase adjustment section.
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公开(公告)号：US10985530B2
公开(公告)日：2021-04-20
申请号：US16539665
申请日：2019-08-13
Inventor： O-Kyun Kwon , Namje Kim , Miran Park , Tae-Soo Kim , Shinmo An , Won Seok Han
Abstract: Provided is a tunable semiconductor laser including an active gain region in which an optical signal is generated according to a modulation signal, a mode control region in which a resonant mode is controlled according to a mode control signal, and a signal chirp of the optical signal is compensated according to a first compensation signal determined based on the modulation signal, and a distributed Bragg reflector (DBR) region in which an oscillation wavelength of the optical signal is determined based on a wavelength selection signal for the optical signal, a second compensation signal for compensating for a thermal chirp of the optical signal on a basis of the modulation signal, and a heater signal provided to a heater electrode.
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公开(公告)号：US10658538B2
公开(公告)日：2020-05-19
申请号：US15956107
申请日：2018-04-18
Inventor： Jae-Sik Sim , Kisoo Kim , Won Seok Han
IPC: H01L31/107 , H01L31/02 , H01L31/18 , H01L31/0216 , H01L31/0304 , H01L31/0224 , H01L31/0352
Abstract: Provided is an optical detection device including a first ohmic contact layer of a first conductivity type, a second ohmic contact layer of a second conductivity type, and first and second mesa structures stacked between the first and second ohmic contact layers. The first mesa structure includes an electric field buffer layer; and a diffusion layer formed in the electric field buffer layer. The second mesa structure includes a light absorbing layer and a grading layer on the light absorbing layer.
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