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Применить Всего найдено 20. Отображено 17.
14-06-2012 дата публикации

TERAHERTZ WAVE GENERATOR

Номер: US20120147907A1
Автор: Han Sang-Pil, KIM Namje, KO Hyunsung, LEE Chul-Wook, LEE DONG-HUN, LEEM Young Ahn, PARK Kyung Hyun
Принадлежит: Electronics and Telecommunications Research Institute

Disclosed is a terahertz wave generator which includes a dual mode semiconductor laser device configured to generate at least two laser lights having different wavelengths and to beat the generated laser lights; and a photo mixer formed on the same chip as the dual mode semiconductor laser device and to generate a continuous terahertz wave when excited by the beat laser light. 1. A terahertz wave generator comprising:a dual mode semiconductor laser device configured to generate at least two laser lights having different wavelengths and to beat the generated laser lights; anda photo mixer formed on the same chip as the dual mode semiconductor laser device and to generate a continuous terahertz wave when excited by the beat laser light.2. The terahertz wave generator of claim 1 , wherein the dual mode semiconductor laser device is formed by a ridge type.3. The terahertz wave generator of claim 2 , wherein the dual mode semiconductor laser device comprises:a first distributed feedback laser diode configured to generate a light having a first wavelength;a second distributed feedback laser diode configured to generate a light having a second wavelength; anda phase tuning region placed between the first distributed feedback laser diode and the second distributed feedback laser diode and configured to control a phase of one of the first and second wavelengths.4. The terahertz wave generator of claim 3 , wherein each of the first distributed feedback laser diode claim 3 , the second distributed feedback laser diode claim 3 , and the phase tuning region includes an active wave guide.5. The terahertz wave generator of claim 4 , further comprising:electrodes formed on upper portions of the active wave guides to control a reflexibility of the active wave guides.6. The terahertz wave generator of claim 3 , wherein the first distributed feedback laser diode includes a first diffraction grating having a first grating period claim 3 , and the second distributed feedback laser diode ...

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Номер записи: 1
21-06-2012 дата публикации

THz-WAVE GENERATION /DETECTION MODULES AND DEVICES INCLUDING THE SAME

Номер: US20120153161A1
Автор: Han Sang-Pil, KIM Namje, KO Hyunsung, LEE Chul-Wook, LEE DONG-HUN, LEEM Young Ahn, PARK Kyung Hyun
Принадлежит: Electronics and Telecommunications Research Institute

Provided are a THz-wave generation/detection module and a device including the same, which increase heating efficiency and are miniaturized. The module includes a photomixer chip, a lens, a PCB, and a package. The photomixer chip includes an active layer, an antenna, and a plurality of electrode pads. The lens is disposed on the photomixer chip. The PCB includes a plurality of solder balls connected to the electrode pads, under the photomixer chip. The package surrounds a bottom and side of the PCB, and dissipates heating of the active layer, which is transferred from the electrode pad of the photomixer chip to the PCB, to outside. 1. A THz-wave generation/detection module comprising:a photomixer chip comprising an active layer, an antenna, and a plurality of electrode pads;a lens disposed on the photomixer chip;a Printed Circuit Board (PCB) comprising a plurality of solder balls connected to the electrode pads, under the photomixer chip; anda package surrounding a bottom and side of the PCB, and dissipating heating of the active layer, which is transferred from the electrode pads of the photomixer chip to the PCB, to outside.2. The THz-wave generation/detection module of claim 1 , wherein the PCB further comprises:a substrate body having a first center hole at a center thereof, and having a first outer hole at an edge of the first center hole;a plurality of via electrodes vertically connected to the solder balls, in the substrate body; anda plurality of ground plates horizontally connected to the via electrodes.3. The THz-wave generation/detection module of claim 2 , wherein the ground plates are connected to a bottom and side of the substrate body in the package.4. The THz-wave generation/detection module of claim 3 , further comprising a conductive adhesive bonding and fixing the PCB and the package.5. The THz-wave generation/detection module of claim 4 , wherein the package comprises:a lower package surrounding a bottom and side of the PCB; andan upper package ...

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Номер записи: 2
27-06-2013 дата публикации

Terahertz wave generator and method of generating terahertz wave

Номер: US20130161541A1
Автор: Han-Cheol Ryu, Hyunsung Ko, Jeong Woo Park, Kyung Hyun Park, Namje Kim, Sang-Pil Han
Принадлежит: Electronics and Telecommunications Research Institute ETRI

Disclosed is a terahertz wave generator which includes a first light source outputting a first light having a first frequency; a second light source outputting a second light having a second frequency different from the first frequency; a second harmonic generation unit performing second harmonic conversion on the first and second lights to generate a third light and a fourth light; and a photomixer converting a mixing light of the third and fourth lights into a terahertz wave alternating signal and outputting a terahertz wave.

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Номер записи: 3
14-11-2013 дата публикации

PHOTO DETECTOR AND OPTICAL DEVICE

Номер: US20130299701A1
Автор: Han Sang-Pil, KIM Namje, KO Hyunsung, LEE DONG-HUN, Park Jeong Woo, PARK Kyung Hyun, Ryu Han-Cheol
Принадлежит: Electronics and Telecommunications Research Institute

An optical device may include first and second lasers generating first and second laser beams; and a photo detector detecting the first and second laser beams. The optical detector comprises a substrate, a first impurity layer on the substrate, an absorption layer on the first impurity layer and a second impurity layer on the absorption layer. The absorption layer generates a terahertz by a beating of the first and second laser beams and has a thickness of less than m. 1. An optical device comprising:a laser generating first and second laser beams; anda photo detector detecting the first and second laser beams,wherein the optical detector comprises a substrate, a first impurity layer on the substrate, an absorption layer on the first impurity layer and a second impurity layer on the absorption layer, andwherein the absorption layer generates a terahertz by a beating of the first and second laser beams and has a thickness of less than 0.2 μm.2. The optical device of claim 1 , wherein the absorption layer has a thickness of 0.005 μm or more.3. The optical device of claim 2 , wherein the first impurity layer claim 2 , the absorption layer and the second impurity layer are a ridge waveguide extending in a specific direction.4. The optical device of claim 3 , wherein the photo detector further comprises a first electrode formed on the first impurity layer of both sides of the absorption layer and a second electrode formed on the second impurity.5. The optical device of claim 3 , further comprising an optical waveguide between the laser and the photo detector.6. The optical device of claim 5 , wherein the optical waveguide comprises a lensed optical fiber.7. The optical device of claim 6 , wherein the ridge waveguide has a beam width of more than 0.5 times that of the lensed optical fiber and absorbs the first and second laser beams.8. The optical device of claim 1 , wherein the absorption layer comprises intrinsic indium gallium arsenic.9. The optical device of claim 1 , ...

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Номер записи: 4
06-03-2014 дата публикации

Apparatus and method for contactless thickness measurement

Номер: US20140061475A1
Автор: Han-Cheol Ryu, Hyunsung Ko, Jeong Woo Park, Kyung Hyun Park, Namje Kim, Sang-Pil Han
Принадлежит: Electronics and Telecommunications Research Institute ETRI

A contactless thickness measuring apparatus is provided which includes an terahertz transmitter configured to receive the first optical path signal from the coupler and to generate a terahertz continuous wave using the first optical signal and an applied bias; an optical delay line configured to delay the second optical path signal output from the coupler; and an terahertz receiver configured to receive the terahertz continuous wave penetrating a sample and to detect an optical current using the terahertz continuous wave and the second optical path signal delayed. A thickness of the sample is a value corresponding to the optical current which phase value becomes a constant regardless of a plurality of measurement frequencies.

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Номер записи: 5
19-06-2014 дата публикации

TERAHERTZ WAVE GENERATING MODULE AND TERAHERTZ WAVE DETECTING DEVICE INCLUDING THE SAME

Номер: US20140166881A1
Автор: Han Sang-Pil, KIM Namje, KO Hyunsung, MOON Kiwon, Park Jeong Woo, PARK Kyung Hyun, Ryu Han-Cheol
Принадлежит: Electronics and Telecommunications Research Institute

A terahertz wave generating module includes a bidirectional light source which provides a first dual-mode beam in a first direction and a second dual-mode beam in a second direction; a forward lens unit which focuses the first dual-mode beam; a photomixer unit which converts the first dual-mode beam focused by the forward lens unit into a terahertz wave; a backward lens unit which focuses the second dual-mode beam; and a light output unit which uses the second dual-mode beam focused by the backward lens unit as a light signal, wherein the bidirectional light source, the forward lens unit, the photomixer unit, the backward lens unit, and the light output unit are integrated in a housing. 1. A terahertz wave generating module , comprising:a bidirectional light source which provides a first dual-mode beam in a first direction and a second dual-mode beam in a second direction;a forward lens unit which focuses the first dual-mode beam;a photomixer unit which converts the first dual-mode beam focused by the forward lens unit into a terahertz wave;a backward lens unit which focuses the second dual-mode beam; anda light output unit which uses the second dual-mode beam focused by the backward lens unit as a light signal,wherein the bidirectional light source, the forward lens unit, the photomixer unit, the backward lens unit, and the light output unit are integrated in a housing.2. The terahertz wave generating module of claim 1 , wherein a wavelength of the second dual-mode beam is equal to that of the first dual-mode beam.3. The terahertz wave generating module of claim 1 , further comprising:an optical isolator located between the bidirectional light source and the forward lens unit and adjusting a propagation direction of the first dual-mode beam in one direction only.4. The terahertz wave generating module of claim 3 , wherein the bidirectional light source claim 3 , the optical isolator claim 3 , and the backward lens unit are placed on a support for adjusting a height ...

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Номер записи: 6
26-06-2014 дата публикации

BEATING SIGNAL MONITORING MODULE, TERAHERTZ WAVE GENERATION DEVICE AND OPTICAL SIGNAL MONITORING DEVICE INCLUDING THE BEATING SIGNAL MONITORING MODULE

Номер: US20140175306A1
Автор: Han Sang-Pil, KIM Namje, KO Hyunsung, Park Jeong Woo, PARK Kyung Hyun, Ryu Han-Cheol
Принадлежит: Electronics and Telecommunications Research Institute

The inventive concept relates to a beating signal monitoring module and a terahertz wave generation device and an optical signal monitoring device that including the beating signal monitoring module. The beating signal monitoring module includes a nonlinear unit generating an optical signal including a FWM light in response to a beating signal generated from a first light and a second light; a filter unit separating the FWM light from the optical signal and outputting the separated FWM light; and a monitoring unit monitoring the beating signal using the separated FWM light. The beating signal monitoring module and a terahertz wave generation device and an optical signal monitoring device that including the beating signal monitoring module can effectively monitor a beating signal being generated by two lasers using a Four Wave Mixing signal. 1. A beating signal monitoring module comprising:a nonlinear unit generating an optical signal including a FWM light in response to a beating signal generated from a first light and a second light;a filter unit separating the FWM light from the optical signal and outputting the separated FWM light; anda monitoring unit monitoring the beating signal using the separated FWM light.2. The beating signal monitoring module of claim 1 , wherein the monitoring unit monitors a frequency difference between the first and second lights using the FWM light.3. The beating signal monitoring module of claim 1 , wherein the monitoring unit further monitors the degree of discrepancy of polarization of the first and second lights using the FWM light.4. The beating signal monitoring module of claim 1 , wherein the monitoring unit further monitors the degree of noises included in the beating signal using the FWM light.5. The beating signal monitoring module of claim 1 , wherein the monitoring unit further monitors the state of the first and second lights using the FWM light.6. The beating signal monitoring module of claim 1 , wherein the monitoring ...

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Номер записи: 7
03-07-2014 дата публикации

APPARATUS FOR GENERATING/DETECTING TERAHERTZ WAVE USING GRAPHENE AND MANUFACTURING METHOD OF THE SAME

Номер: US20140183441A1
Автор: Han Sang-Pil, KIM Namje, KO Hyunsung, MOON Kiwon, Park Jeong Woo, PARK Kyung Hyun, Ryu Han-Cheol
Принадлежит: Electronics and Telecommunications Research Institute

Provided is a terahertz wave generating/detecting apparatus and a method for manufacturing the same. The terahertz wave generating/detecting apparatus includes; a substrate having an active region and a transmitting region; a lower metal layer extending in a first direction on the active region and the transmitting region of the substrate; a graphene layer disposed on the lower metal layer on the active region; and upper metal layers extending in the first direction on the graphene layer of the active region and the substrate in the transmission region, wherein a terahertz wave is generated or amplified by a surface plasmon polariton that is induced on a boundary surface between the graphene layer and the lower metal layer by beated laser light applied to the graphene layer and the metal layer. 1. A terahertz wave generating/detecting apparatus comprising:a substrate having an active region and a transmitting region;a lower metal layer extending in a first direction on the active region and the transmitting region of the substrate;a graphene layer disposed on the lower metal layer of the active region; andupper metal layers extending in the first direction on the graphene layer of the active region and the substrate of the transmission region,wherein a terahertz wave is generated or amplified by a surface plasmon polariton that is induced on a boundary surface between the graphene layer and the lower metal layer by beated laser light applied to the graphene layer and the lower metal layer.2. The terahertz wave generating/detecting apparatus of claim 1 , wherein the upper metal layers are spaced apart from each other in a second direction crossing the first direction.3. The terahertz wave generating/detecting apparatus of claim 2 , further comprising a dielectric layer disposed on the graphene layer between the upper metal layers.4. The terahertz wave generating/detecting apparatus of claim 3 , wherein the dielectric layer comprises a polymer.5. The terahertz wave ...

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Номер записи: 8
30-05-2019 дата публикации

Optical signal generating apparatus and operating method thereof

Номер: US20190165863A1
Автор: Miran PARK, Namje Kim, O-Kyun Kwon, Shinmo AN, Won Seok Han
Принадлежит: Electronics and Telecommunications Research Institute ETRI

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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Номер записи: 9
02-07-2020 дата публикации

High-output power quarter-wavelength shifted distributed feedback laser diode

Номер: US20200212652A1
Автор: Miran PARK, Namje Kim, O-Kyun Kwon, Shinmo AN, Tae-soo Kim, Won Seok Han
Принадлежит: Electronics and Telecommunications Research Institute ETRI

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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Номер записи: 10
02-07-2020 дата публикации

Tunable semiconductor laser and operation method thereof

Номер: US20200212653A1
Автор: Miran PARK, Namje Kim, O-Kyun Kwon, Shinmo AN, Tae-soo Kim, Won Seok Han
Принадлежит: Electronics and Telecommunications Research Institute ETRI

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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Номер записи: 11
13-04-2015 дата публикации

テラヘルツ連続波発生素子

Номер: JP2015070268A
Автор: Jeong Woo Park, Keigen Boku, Ki Won Moon, Namje Kim, Sang-Pil Han, 基 愿 文, 基 愿 文, 景 鉉 朴, 景 鉉 朴, 正 愚 朴, 正 愚 朴, 男 濟 金, 男 濟 金, 相 弼 韓, 相 弼 韓
Принадлежит: Electronics and Telecommunications Research Institute ETRI

【課題】光素子集積技術を利用して単一素子の形態で形成することができるテラヘルツ連続波発生素子を提供する。 【解決手段】複数のレーザー光を生成する複数のレーザー光源１００と、複数のレーザー光の相互作用を調節するためにレーザー光源１００の間に形成される吸収領域２００と、を含むが、吸収領域２００がフォトダイオードが形成された形態で具現され、フォトダイオードにはテラヘルツアンテナが集積される。 【選択図】図２

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Номер записи: 12
08-07-2014 дата публикации

Photo detector and optical device

Номер: US8772725B2
Автор: Dong-Hun Lee, Han-Cheol Ryu, Hyunsung Ko, Jeong Woo Park, Kyung Hyun Park, Namje Kim, Sang-Pil Han
Принадлежит: Electronics and Telecommunications Research Institute ETRI

An optical device may include first and second lasers generating first and second laser beams; and a photo detector detecting the first and second laser beams. The optical detector comprises a substrate, a first impurity layer on the substrate, an absorption layer on the first impurity layer and a second impurity layer on the absorption layer. The absorption layer generates a terahertz by a beating of the first and second laser beams and has a thickness of less than 0.2 μm.

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Номер записи: 13
08-09-2015 дата публикации

Apparatus for generating/detecting terahertz wave using graphene and manufacturing method of the same

Номер: US9130082B2
Автор: Han-Cheol Ryu, Hyunsung Ko, Jeong Woo Park, Kiwon MOON, Kyung Hyun Park, Namje Kim, Sang-Pil Han
Принадлежит: Electronics and Telecommunications Research Institute ETRI

Provided is a terahertz wave generating/detecting apparatus and a method for manufacturing the same. The terahertz wave generating/detecting apparatus includes; a substrate having an active region and a transmitting region; a lower metal layer extending in a first direction on the active region and the transmitting region of the substrate; a graphene layer disposed on the lower metal layer on the active region; and upper metal layers extending in the first direction on the graphene layer of the active region and the substrate in the transmission region, wherein a terahertz wave is generated or amplified by a surface plasmon polariton that is induced on a boundary surface between the graphene layer and the lower metal layer by beated laser light applied to the graphene layer and the metal layer.

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Номер записи: 14
20-07-2023 дата публикации

Optical integrated device and manufacturing method of the same

Номер: US20230227960A1
Автор: Ho Sung Kim, Miran PARK, Namje Kim, O-Kyun Kwon, Seungchul Lee, Won Seok Han
Принадлежит: Electronics and Telecommunications Research Institute ETRI

Provided is a method of manufacturing an optical integrated device. The method includes forming a lower clad layer on a substrate, forming a plurality of mask patterns arranged in one direction on the lower clad layer, forming a core layer on a portion of the lower clad layer by a selective area growth method using the mask patterns as deposition masks, and forming an upper clad layer on the core layers, wherein the mask patterns have different widths or include mask layers of different materials.

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Номер записи: 15
19-09-2024 дата публикации

Electro-absorption modulated lasers with identical-active layer

Номер: US20240313503A1
Автор: Ho Sung Kim, Miran PARK, Namje Kim, O-Kyun Kwon, Seungchul Lee
Принадлежит: Electronics and Telecommunications Research Institute ETRI

Provided is an electro-absorption modulated lasers with identical-active layer. The lasers include a substrate having a passive waveguide region, an LD region on one side of the passive waveguide region, and an EAM region on the other side of the passive waveguide region, an active layer provided on the substrate and extending from the LD region to the EAM region, a grating layer provided on the active layer, a clad layer provided on the grating layer, and electrodes provided in the LD region and the EAM region of the clad layer.

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Номер записи: 16
09-08-2016 дата публикации

Beating signal monitoring module, terahertz wave generation device and optical signal monitoring device including the beating signal monitoring module

Номер: US09410851B2
Автор: Han-Cheol Ryu, Hyunsung Ko, Jeong Woo Park, Kyung Hyun Park, Namje Kim, Sang-Pil Han
Принадлежит: Electronics and Telecommunications Research Institute ETRI

The inventive concept relates to a beating signal monitoring module and a terahertz wave generation device and an optical signal monitoring device that including the beating signal monitoring module. The beating signal monitoring module includes a nonlinear unit generating an optical signal including a FWM light in response to a beating signal generated from a first light and a second light; a filter unit separating the FWM light from the optical signal and outputting the separated FWM light; and a monitoring unit monitoring the beating signal using the separated FWM light. The beating signal monitoring module and a terahertz wave generation device and an optical signal monitoring device that including the beating signal monitoring module can effectively monitor a beating signal being generated by two lasers using a Four Wave Mixing signal.

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Номер записи: 17