公开(公告)号：US06392781B1

公开(公告)日：2002-05-21

申请号：US09498610

申请日：2000-02-04

申请人： Je Ha Kim ,  Chan Yong Park ,  Kwang Eui Pyun

发明人： Je Ha Kim ,  Chan Yong Park ,  Kwang Eui Pyun

IPC分类号： G02F103

CPC分类号： B82Y20/00 ,  G02F1/01708

摘要： The present invention relates to an electrical field absorbing semiconductor optical modulator, more particularly, to a high speed semiconductor optical modulator and a fabricating method thereof. The present invention includes a high speed semiconductor optical modulator, the optical modulator formed by stacking an n-type light-wave guiding layer, a light absorbing layer, a p-type light-wave guiding layer, a p-type clad layer, and a p-type ohmic contact layer on a substrate successively, the optical modulator having a ridge structure wherein the optical modulator is an electric-field absorbing type, and wherein width W3 of the light absorbing layer is less than the width W1 of the p-type ohmic contact layer. Accordingly, the present invention enables to provide high speed optical modulation of tens of giga rate of which modulating characteristics are excellent by reducing contact resistance and capacitance, which are the major problems of ruining the characteristics of an optical modulator, simultaneously.

摘要翻译： 本发明涉及一种电场吸收半导体光调制器，更具体地涉及一种高速半导体光调制器及其制造方法。 本发明包括高速半导体光调制器，通过堆叠n型光波导层，光吸收层，p型光波导层，p型覆层和 基板上的p型欧姆接触层，其光调制器具有脊结构，其中光调制器是电场吸收型，并且其中光吸收层的宽度W3小于p型欧姆接触层的宽度W1， 型欧姆接触层。 因此，本发明能够通过降低接触电阻和电容来提供几十兆比特的高速光调制，其中调制特性同时是破坏光调制器特性的主要问题。

公开(公告)号：US20080285978A1

公开(公告)日：2008-11-20

申请号：US12053694

申请日：2008-03-24

申请人： Kwang Seong Choi ,  Yong Duck Chung ,  Jae Sik Sim ,  Jong Tae Moon ,  Hyun Kyu Yu ,  Je Ha Kim

发明人： Kwang Seong Choi ,  Yong Duck Chung ,  Jae Sik Sim ,  Jong Tae Moon ,  Hyun Kyu Yu ,  Je Ha Kim

IPC分类号： H04B10/00

CPC分类号： H04B10/25752 ,  H01L2224/45147 ,  H01L2224/48091 ,  H01L2924/00014

摘要： Provided is an optical hybrid module in which an optical device, a filter, an amplifier and an antenna are hybrid-integrated, which includes: a silicon optical bench disposed on a substrate and having an optical fiber and an optical device; an amplifier disposed on the substrate and connected to the optical device disposed on the silicon optical bench to amplify a signal transmitted from the optical device; and an antenna disposed on the substrate to be connected to the amplifier and transmitting a signal amplified by the amplifier. Thus, a foot-print module may be embodied by disposing an antenna and a filter on a single- or multi-layer substrate and providing a bias required for the optical device and the amplifier through a solder ball. Also, due to the antenna and filter disposed on the substrate, an expensive connector is not needed, and thus a production costs can be reduced.

摘要翻译： 提供了一种光混合模块，其中光学装置，滤波器，放大器和天线是混合集成的，其包括：设置在基板上并具有光纤和光学装置的硅光学台; 放大器，设置在所述基板上并连接到设置在所述硅光学台上的所述光学装置，以放大从所述光学装置发送的信号; 以及设置在所述基板上以连接到所述放大器并且发射由所述放大器放大的信号的天线。 因此，可以通过在单层或多层衬底上设置天线和滤波器并通过焊球提供光学器件和放大器所需的偏置来实现脚印模块。 此外，由于设置在基板上的天线和滤波器，不需要昂贵的连接器，因此可以降低生产成本。

公开(公告)号：US20110017289A1

公开(公告)日：2011-01-27

申请号：US12769756

申请日：2010-04-29

申请人： Rae-Man PARK ,  Chull Won Ju ,  Dae-Hyung Cho ,  Yong-Duck Chung ,  Sung-Bum Bae ,  Won Seok Han ,  Kyu-Seok Lee ,  Je Ha Kim

发明人： Rae-Man PARK ,  Chull Won Ju ,  Dae-Hyung Cho ,  Yong-Duck Chung ,  Sung-Bum Bae ,  Won Seok Han ,  Kyu-Seok Lee ,  Je Ha Kim

IPC分类号： H01L31/032 ,  H01L31/18

CPC分类号： H01L31/0749 ,  H01L31/0236 ,  H01L31/0322 ,  H01L31/1828 ,  Y02E10/541 ,  Y02E10/543

摘要： Provided are a CIGS solar cell and a method of fabricating the CIGS solar cell. In the method, a buffer layer exposing protrusions is formed. Then, a window electrode layer having an uneven surface conforming with the protrusions of the buffer layer is formed. Thus, an additional process for making the upper surface of a window electrode layer rough is unnecessary in order to decrease surface reflectance of incident sunlight and increase the solar cell efficiency, so that productivity can be improved.

摘要翻译： 提供CIGS太阳能电池和制造CIGS太阳能电池的方法。 在该方法中，形成暴露突起的缓冲层。 然后，形成具有与缓冲层的突起一致的不平坦表面的窗口电极层。 因此，为了降低入射的太阳光的表面反射率和提高太阳能电池的效率，不需要用于使窗口电极层的上表面粗糙化的附加工艺，从而可以提高生产率。

公开(公告)号：US20070171515A1

公开(公告)日：2007-07-26

申请号：US11451743

申请日：2006-06-13

申请人： Young Shik Kang ,  Je Ha Kim ,  Sung Bock Kim ,  Yong Duck Chung ,  Kwang Seong Choi

发明人： Young Shik Kang ,  Je Ha Kim ,  Sung Bock Kim ,  Yong Duck Chung ,  Kwang Seong Choi

IPC分类号： H01S3/00 ,  G02B6/10

CPC分类号： H01S5/026 ,  H01S5/0262 ,  H01S5/0265 ,  H01S5/1014 ,  H01S5/22 ,  H01S5/50

摘要： An electroabsorption (EA) duplexer in which an optical amplifier, a photodetector, and an optical modulator are monolithically integrated to obtain a high radio frequency (RF) gain in radio-over fiber (RoF) link optical transmission technology is provided. The EA duplexer includes a substrate, a separation area, an optical detection/modulation unit, and an optical amplification unit. The separation area includes a first epitaxial layer formed of at least one material layer on the substrate. The first epitaxial layer functions as a first optical waveguide. The optical detection/modulation unit includes a second epitaxial layer formed of at least one material layer on the first epitaxial layer to detect and modulate an optical signal. The second epitaxial layer functions as a second optical waveguide. The optical amplification unit includes the second optical waveguide and a third epitaxial layer formed of at least one material layer on the second epitaxial layer to amplify an optical signal. The third epitaxial layer functions as a third optical waveguide. The optical amplification unit is electrically separated from the optical detection/modulation unit by the separation area and is disposed on at least one side of the optical detection/modulation unit.

摘要翻译： 提供了其中光放大器，光电检测器和光调制器被单片集成以获得无线电光纤（RoF）链路光传输技术中的高射频（RF）增益的电吸收（EA）双工器。 EA双工器包括基板，分离区，光检测/调制单元和光放大单元。 分离区域包括由衬底上的至少一个材料层形成的第一外延层。 第一外延层用作第一光波导。 光检测/调制单元包括由第一外延层上的至少一个材料层形成的第二外延层，以检测和调制光信号。 第二外延层用作第二光波导。 光放大单元包括第二光波导和由第二外延层上的至少一个材料层形成的第三外延层，以放大光信号。 第三外延层用作第三光波导。 光放大单元通过分离区域与光检测/调制单元电分离，并设置在光检测/调制单元的至少一侧。

公开(公告)号：US08335200B2

公开(公告)日：2012-12-18

申请号：US12676749

申请日：2008-05-23

申请人： Yong Duck Chung ,  Kwang Seong Choi ,  Jae Sik Sim ,  Yong Hwan Kwon ,  Sung Bok Kim ,  Je Ha Kim

发明人： Yong Duck Chung ,  Kwang Seong Choi ,  Jae Sik Sim ,  Yong Hwan Kwon ,  Sung Bok Kim ,  Je Ha Kim

IPC分类号： H04H1/00

CPC分类号： H04B10/25759 ,  H04W88/10

摘要： Provided are a method and device for separating and converting multiband signals. The device includes a photoelectric converter for converting an externally received optical signal into an electrical signal, a first switch for separating the converted electrical signal into signals according to frequency bands, a first mobile communication band-pass amplifier for amplifying a mobile communication network signal of the signals separated by the first switch, a broadband up-converter for up-converting a baseband signal of the signals separated by the first switch into a broadband signal, a first broadband amplifier for amplifying the broadband signal output from the broadband up-converter, and a transmitter for wirelessly transmitting the signals amplified by the first mobile communication band-pass amplifier and the first broadband amplifier.

摘要翻译： 提供了用于分离和转换多频带信号的方法和装置。 该装置包括用于将外部接收的光信号转换为电信号的光电转换器，用于根据频带将转换后的电信号分离为信号的第一开关，用于放大移动通信网络信号的第一移动通信带通放大器 由第一开关分离的信号，用于将由第一开关分离的信号的基带信号上变频为宽带信号的宽带上变频器，用于放大从宽带上变频器输出的宽带信号的第一宽带放大器， 以及用于无线地发送由第一移动通信带通放大器和第一宽带放大器放大的信号的发射机。

公开(公告)号：US20100319777A1

公开(公告)日：2010-12-23

申请号：US12604450

申请日：2009-10-23

申请人： Sung-Bum BAE ,  Yong-Duck Chung ,  Won Seok Han ,  Dae-Hyung Cho ,  Je Ha Kim

发明人： Sung-Bum BAE ,  Yong-Duck Chung ,  Won Seok Han ,  Dae-Hyung Cho ,  Je Ha Kim

IPC分类号： H01L31/0232 ,  H01L31/18

CPC分类号： H01L31/0322 ,  H01L31/0392 ,  H01L31/03923 ,  H01L31/03925 ,  H01L31/072 ,  Y02E10/52 ,  Y02E10/541 ,  Y02P70/521

摘要： A solar cell and method of fabricating the same are provided. The solar cell includes a metal electrode layer, an optical absorption layer, a buffer layer, and a transparent electrode layer. The metal electrode layer is disposed on a substrate. The optical absorption layer is disposed on the metal electrode layer. The buffer layer is disposed on the optical absorption layer and includes an indium gallium nitride (InxGa1-xN). The transparent electrode layer is disposed on the buffer layer.

摘要翻译： 提供了一种太阳能电池及其制造方法。 太阳能电池包括金属电极层，光吸收层，缓冲层和透明电极层。 金属电极层设置在基板上。 光吸收层设置在金属电极层上。 缓冲层设置在光吸收层上并包括氮化铟镓（In x Ga 1-x N）。 透明电极层设置在缓冲层上。

公开(公告)号：US07298933B2

公开(公告)日：2007-11-20

申请号：US11148906

申请日：2005-06-09

申请人： Kwang Seong Choi ,  Jong Hyun Lee ,  Yong Duck Chung ,  Young Shik Kang ,  Jong Tae Moon ,  Je Ha Kim

发明人： Kwang Seong Choi ,  Jong Hyun Lee ,  Yong Duck Chung ,  Young Shik Kang ,  Jong Tae Moon ,  Je Ha Kim

IPC分类号： G02F1/01 ,  G02F1/35

CPC分类号： G02F1/0356

摘要： Provided is an optical module including a microstrip line, a traveling wave type optical device positioned in the end of the microstrip line, and at least one balanced open stub connected to the microstrip line for the impedance matching at a specific frequency such as 40 GHz and 60 GHz. For the fine tuning, laser trimming can be applied to the stub. A transition region is formed between the optical device and the microstrip line. A termination resistor is formed to face the microstrip line with the optical device therebetween. A bandwidth can be controlled at a specific frequency by adjusting a number of the stubs or a value of the termination resistor.

摘要翻译： 提供了一种光学模块，其包括微带线，位于微带线的端部的行波型光学器件和连接到微带线的至少一个平衡的开路短路，用于在特定频率例如40GHz的阻抗匹配，以及 60 GHz。 对于微调，激光修剪可以应用于存根。 在光学器件和微带线之间形成过渡区域。 形成终端电阻器，以便在其间具有光学器件来面对微带线。 可以通过调整短路的数量或终端电阻的值来控制带宽在特定频率。

公开(公告)号：US06985273B2

公开(公告)日：2006-01-10

申请号：US10743463

申请日：2003-12-23

申请人： Young Shik Kang ,  Je Ha Kim ,  Ji Youn Lim ,  Sung Bock Kim

发明人： Young Shik Kang ,  Je Ha Kim ,  Ji Youn Lim ,  Sung Bock Kim

IPC分类号： G02F

CPC分类号： B82Y20/00 ,  G02F1/01708 ,  G02F2001/0175

摘要： Disclosed is an electro-absorption optical modulator using a semiconductor device. The optical modulator makes use of a change in light absorption caused by displacement of an absorption curve depending on a bias voltage applied to the device. Here, a level of the light absorption depending on the bias voltage is expressed as a transfer function of output light to the applied bias, and the transfer function has a non-linear profile due to a characteristic of a material. Unlike signal modulation of a digital optical communication system, an analog optical transmission system can be subjected to deterioration in performance, because the non-linear characteristic of the transfer function for the optical modulator generates signal distortion when an electrical signal is converted into an optical signal. The typical optical modulator has an absorption layer constituted of quantum wells having the same width. However, the inventive optical modulator has the absorption layer formed by the combination of quantum wells having a width different form each other, thus having excellent linearity.

摘要翻译： 公开了使用半导体器件的电吸收光调制器。 光调制器利用由施加到器件的偏置电压引起的吸收曲线位移引起的光吸收变化。 这里，根据偏置电压的光吸收水平被表示为输出光到施加偏压的传递函数，并且传递函数由于材料的特性而具有非线性轮廓。 与数字光通信系统的信号调制不同，模拟光传输系统由于光调制器的传递函数的非线性特性在将电信号转换成光信号时会产生信号失真 。 典型的光调制器具有由具有相同宽度的量子阱构成的吸收层。 然而，本发明的光调制器具有通过量子阱的组合形成的吸收层，该量子阱具有彼此不同的宽度，因此具有优异的线性。

公开(公告)号：US20100246451A1

公开(公告)日：2010-09-30

申请号：US12676749

申请日：2008-05-23

申请人： Yong Duck Chung ,  Kwang Seong Choi ,  Jae Sik Sim ,  Yong Hwan Kwon ,  Sung Bok Kim ,  Je Ha Kim

发明人： Yong Duck Chung ,  Kwang Seong Choi ,  Jae Sik Sim ,  Yong Hwan Kwon ,  Sung Bok Kim ,  Je Ha Kim

IPC分类号： H04W92/02 ,  H04L5/14

CPC分类号： H04B10/25759 ,  H04W88/10

摘要： Provided are a method and device for separating and converting multiband signals. The device includes a photoelectric converter for converting an externally received optical signal into an electrical signal, a first switch for separating the converted electrical signal into signals according to frequency bands, a first mobile communication band-pass amplifier for amplifying a mobile communication network signal of the signals separated by the first switch, a broadband up-converter for up-converting a baseband signal of the signals separated by the first switch into a broadband signal, a first broadband amplifier for amplifying the broadband signal output from the broadband up-converter, and a transmitter for wirelessly transmitting the signals amplified by the first mobile communication band-pass amplifier and the first broadband amplifier.

摘要翻译： 提供了用于分离和转换多频带信号的方法和装置。 该装置包括用于将外部接收的光信号转换为电信号的光电转换器，用于根据频带将转换后的电信号分离为信号的第一开关，用于放大移动通信网络信号的第一移动通信带通放大器 由第一开关分离的信号，用于将由第一开关分离的信号的基带信号上变频为宽带信号的宽带上变频器，用于放大从宽带上变频器输出的宽带信号的第一宽带放大器， 以及用于无线地发送由第一移动通信带通放大器和第一宽带放大器放大的信号的发射机。

公开(公告)号：US07553092B2

公开(公告)日：2009-06-30

申请号：US11450743

申请日：2006-06-08

申请人： Kwang Seong Choi ,  Yong Duck Chung ,  Young Shik Kang ,  Dong Suk Jun ,  Je Ha Kim ,  Jong Tae Moon

发明人： Kwang Seong Choi ,  Yong Duck Chung ,  Young Shik Kang ,  Dong Suk Jun ,  Je Ha Kim ,  Jong Tae Moon

IPC分类号： G02B6/36

CPC分类号： G02F1/0121 ,  G02B6/4201 ,  G02B6/4279 ,  H01L2224/48091 ,  H01L2924/3011 ,  H01L2924/00014 ,  H01L2924/00

摘要： Provided is an optical module used in a communication system employing a radio over fiber (ROF) technology delivering a radio frequency (RF) signal through an optical fiber. The optical module includes: an optical device; a signal line for transporting a radio frequency (RF) signal input from an external circuit to the optical device; and a resistor separately disposed from the signal line and having one end connected with the optical device, wherein the input impedance seen from the signal line is matched by the resistor. A bias voltage supplied to operate the optical device is applied through an inductor connected to the signal line between the optical device and a filter. Here, the filter formed by a pattern of the signal line prevents the bias voltage from being supplied to the external circuit. In order to amplify the RF signal input from the external circuit, an amplifier may be connected between the external circuit and the filter.

摘要翻译： 提供了一种用于通过光纤传送射频（RF）信号的无线电光纤（ROF）技术的通信系统中的光学模块。 光学模块包括：光学装置; 用于将从外部电路输入的射频（RF）信号传送到光学装置的信号线; 以及与信号线分开设置并且具有与光学装置连接的一端的电阻，其中从信号线看到的输入阻抗由电阻器匹配。 提供用于操作光学器件的偏置电压通过连接到光学器件和滤光器之间的信号线的电感器施加。 这里，由信号线的图案形成的滤波器防止偏置电压被提供给外部电路。 为了放大从外部电路输入的RF信号，可以在外部电路和滤波器之间连接放大器。