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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
发明人： Joong-Seon Choe , Duk Jun Kim , Jong-Hoi Kim , Jonghyurk Park , Won Seok Han
摘要： 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：US11005570B2
公开(公告)日：2021-05-11
申请号：US16846948
申请日：2020-04-13
发明人： Seo Young Lee , Young-Tak Han , Jong-Hoi Kim
摘要： Provided are a coherent optical receiver and a fabrication method thereof, the coherent optical receiver including a substrate, signal and local input waveguides extending in a first direction parallel to a top surface of the substrate and configured to receive an optical signal, a first optical circuit element including a first optical waveguide connected to the signal input waveguide and a trench provided in one side of the first optical waveguide in parallel to the first direction, a second optical circuit element including a second optical waveguide connected to the first optical waveguide, a slit crossing the second optical waveguide, and a wavelength plate inserted to the slit, and third optical circuit elements connected to the second optical circuit element, wherein the first to third optical circuit elements are monolithically integrated in the substrate.
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公开(公告)号：US10935741B2
公开(公告)日：2021-03-02
申请号：US16572089
申请日：2019-09-16
发明人： Young-Tak Han , Seok-Tae Kim , Jong-Hoi Kim , Sang-Ho Park , Yongsoon Baek , Jang-Uk Shin , Seo-Young Lee
摘要： Provided is an optical module including an optical waveguide device through which multiple channel lightwaves are input and output, an optical transmission/reception unit disposed on one side of the optical waveguide device, an electronic IC disposed on one side of the optical transmission/reception unit and configured to drive the optical transmission/reception unit, a flexible printed circuit board (PCB) disposed on the optical transmission/reception unit and the electronic IC, a first solder ball between the optical transmission/reception unit and the flexible PCB and a second solder ball between the electronic IC and the flexible PCB.
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公开(公告)号：US08929731B2
公开(公告)日：2015-01-06
申请号：US13687741
申请日：2012-11-28
发明人： Chun Ju Youn , Joong-Seon Choe , Jong-Hoi Kim , Duk Jun Kim , Yong-Hwan Kwon , Eun Soo Nam
IPC分类号： H04B10/08 , H04B17/00 , H04B10/06 , H04B10/61 , H04B10/079
CPC分类号： H04B10/614 , H04B10/0799
摘要： An apparatus for measuring performance of a coherent optical receiver includes a beam splitter splitting light into first and second paths, a first optical modulator modulating the first path light, a variable optical attenuator controlling an optical power of the first optical modulator, a first polarization controller transmitting a signal controlling polarization of an output of the variable optical attenuator to the coherent optical receiver, a second optical modulator modulating the second path light, a variable optical delay line delaying time of an output of the second optical modulator, a second polarization controller transmitting a signal controlling polarization of an output of the variable optical delay line to the coherent optical receiver, a network analyzer measuring performance of the coherent optical receiver and controlling the optical modulators, and a controller transmitting a control signal to the optical modulators.
摘要翻译： 一种用于测量相干光接收机性能的装置，包括将光分成第一和第二路径的光束分配器，调制第一路径光的第一光调制器，控制第一光调制器的光功率的可变光衰减器，第一偏振控制器 将所述可变光衰减器的输出的偏振信号控制到所述相干光接收器，调制所述第二路径光的第二光调制器，所述第二光调制器的输出的可变光延迟线延迟时间，第二偏振控制器发送 控制可变光延迟线到相干光接收机的输出的偏振的信号，测量相干光接收机的性能并控制光调制器的网络分析仪，以及向光调制器发送控制信号的控制器。
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公开(公告)号：US10649139B2
公开(公告)日：2020-05-12
申请号：US16215416
申请日：2018-12-10
发明人： Duk Jun Kim , Young-Ho Ko , Dong-Young Kim , Jong-Hoi Kim , Yongsoon Baek , Jung-Ho Song , Dong Hyo Lee , Byung-Seok Choi , Won Seok Han
摘要： An optical waveguide structure includes a substrate and a core structure disposed on the substrate. The substrate includes a first waveguide region, a second waveguide region, and a transition region between the first waveguide region and the second waveguide region. The core structure includes first core segments arranged in a first direction and a second direction crossing the first direction on the transition region. The core structure includes second core segments arranged in the first direction and the second direction on the second waveguide region. The first direction and the second direction are parallel to a top surface of the substrate.
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公开(公告)号：US09166680B2
公开(公告)日：2015-10-20
申请号：US14027445
申请日：2013-09-16
发明人： Chun Ju Youn , Jong-Hoi Kim , Joong-Seon Choe , Duk Jun Kim , Yong-Hwan Kwon , Eun Soo Nam
IPC分类号： H04B10/073 , H04B10/61 , H04L27/22 , H04L27/36 , H04L27/00
CPC分类号： H04B10/0731 , H04B10/613 , H04L27/223 , H04L27/364 , H04L2027/0083
摘要： Provided is an apparatus and method for measuring IQ imbalance, and in particular, is an apparatus and method for measuring IQ imbalance for an optical receiver. The apparatus for measuring IQ imbalance for an optical receiver includes a light generating unit generating optical and reference signals to provide the optical and reference signals to an optical receiver, a graph creating unit creating a Lissajous figure by using an in-phase (I) signal and a quadrature-phase (Q) signal output from the optical receiver in response to the optical and reference signals, and a calculating unit calculating IQ imbalance for the optical receiver with reference to the Lissajous figure.
摘要翻译： 提供了一种用于测量IQ不平衡的装置和方法，特别是用于测量光接收机的IQ不平衡的装置和方法。 用于测量光接收机的IQ不平衡的装置包括产生光学和参考信号以向光学接收器提供光学参考信号的光产生单元，通过使用同相（I）信号产生李萨如图的图形创建单元 以及响应于光学参考信号从光学接收器输出的正交相位（Q）信号，以及计算单元，参考利萨如图来计算光学接收机的IQ不平衡。
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公开(公告)号：US11101897B1
公开(公告)日：2021-08-24
申请号：US17185484
申请日：2021-02-25
发明人： Jong-Hoi Kim
摘要： Disclosed is an optical receiver. The optical receiver includes an optical splitter that splits an external light signal to output a first light signal and a second light signal, a first amplifier that amplifies the first light signal in a linear gain section to output an amplified first light signal, a second amplifier that amplifies the second light signal in a saturation gain section to output an amplified second light signal, a polarization division hybrid that outputs an in-phase hybrid light signal and a quadrature-phase hybrid light signal, based on a reference light signal and the amplified second light signal, and an optoelectronic conversion unit that outputs an electrical signal, based on the amplified first light signal, the in-phase hybrid light signal, and the quadrature-phase hybrid light signal.
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8.发明授权公开(公告)号：US09031421B2
公开(公告)日：2015-05-12
申请号：US13934589
申请日：2013-07-03
发明人： Joong-Seon Choe , Chun Ju Youn , Jong-Hoi Kim , Duk Jun Kim , Yong-Hwan Kwon , Kwang-Seong Choi , Eun Soo Nam
IPC分类号： H04B10/06 , H04B10/077
CPC分类号： H04B10/0779
摘要： Provided is a method of measuring signal transmission time difference of a measuring device. The measuring device according to embodiments, by measuring a skew on two optical paths through signal delays of sufficient sizes for skew measurement on the optical paths, even a skew having a minute size can be measured within a measurable range.
摘要翻译： 提供了测量装置的信号传输时间差的测量方法。 根据实施例的测量装置可以在可测量的范围内测量通过在光路上经过足够尺寸的信号延迟的信号延迟测量两个光路上的偏斜测量，甚至具有微小尺寸的偏斜。
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公开(公告)号：US09077453B2
公开(公告)日：2015-07-07
申请号：US13839013
申请日：2013-03-15
发明人： Jong-Hoi Kim
CPC分类号： H04B10/61 , G02B6/12004 , G02B6/12007 , G02B6/125 , G02B6/2813
摘要： Provide an optical receiver module. The optical receiver module includes: an optical fiber array including a first optical fiber that delivers an optical signal and a second optical fiber that delivers a reference optical signal; a plate optical integrated circuit including first and second multi mode interference (MMI) optical isolators respectively receiving the optical signal and the reference optical signal through a plurality of first optical waveguides; and an optical detector array receiving two optical signals from each of the first and second MMI optical isolators through a plurality of second optical waveguides, wherein the optical detector array includes a plurality of third optical waveguides aligned to be connected to the other end of each of the plurality of second optical waveguides in one-to-one correspondence.
摘要翻译： 提供光接收模块。 光接收模块包括：光纤阵列，包括传送光信号的第一光纤和传送参考光信号的第二光纤; 包括通过多个第一光波导分别接收光信号和参考光信号的第一和第二多模干涉（MMI）光隔离器的平板光集成电路; 以及光学检测器阵列，其通过多个第二光波导从所述第一和第二MMI光隔离器中的每一个接收两个光信号，其中所述光检测器阵列包括多个第三光波导，所述第三光波导被对准以连接到每个的另一端 所述多个第二光波导以一对一的对应关系。
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