公开(公告)号：US08693459B2

公开(公告)日：2014-04-08

申请号：US12772350

申请日：2010-05-03

Applicant: Chun Ju Youn ,  Yong-Hwan Kwon ,  Jong-Hoi Kim ,  Joong-Seon Choe ,  Kwang-Seong Choi ,  Kyoungwoo Heo ,  Eun Soo Nam

Inventor： Chun Ju Youn ,  Yong-Hwan Kwon ,  Jong-Hoi Kim ,  Joong-Seon Choe ,  Kwang-Seong Choi ,  Kyoungwoo Heo ,  Eun Soo Nam

IPC: H04J3/06

CPC classification number: H04L25/0226 ,  H04B10/532 ,  H04B10/548 ,  H04J14/06 ,  H04L27/2613

Abstract: Provided is a polarization division multiplexed optical OFDM transmitter. The polarization division multiplexed optical OFDM transmitter includes a data demultiplexer, a training symbol generation unit and an optical up-converter and polarization division multiplexing unit. The data demultiplexer divides a transmission signal into a plurality of groups. The training symbol generation unit allocates a plurality of training symbols for each OFDM data which is included in the respective multiplexed groups, and allocates repetitive data in a time domain for the respective training symbols for data of 0 to periodically appear for the respective training symbols in a frequency domain. The optical up-converter and polarization division multiplexing unit performs optical frequency band conversion and polarization division multiplexing on an output of the training symbol generation unit to output a polarization division multiplexed optical OFDM signal corresponding to a plurality of polarization components.

Abstract translation: 提供了一种偏振分复用光OFDM传输器。 偏振分复用光OFDM传输器包括数据解复用器，训练符号生成单元和光上变频器和偏振分割复用单元。 数据解复用器将发送信号分成多个组。 训练符号生成单元为包含在各个多路复用组中的每个OFDM数据分配多个训练符号，并且在时域中分配针对各个训练符号的各个训练符号的重复数据，以针对各个训练符号周期性出现 频域。 光学上变频器和偏振分光复用单元在训练符号生成单元的输出上执行光频带转换和偏振分割复用，以输出对应于多个偏振分量的偏振复用光OFDM信号。

公开(公告)号：US08521040B2

公开(公告)日：2013-08-27

申请号：US12773573

申请日：2010-05-04

Applicant: Chun Ju Youn ,  Yong-Hwan Kwon ,  Eun Soo Nam ,  Jong-Hoi Kim ,  Joong-Seon Choe ,  Kwang-Seong Choi

Inventor： Chun Ju Youn ,  Yong-Hwan Kwon ,  Eun Soo Nam ,  Jong-Hoi Kim ,  Joong-Seon Choe ,  Kwang-Seong Choi

IPC: H04B10/06

CPC classification number: H04J14/00 ,  H04B10/6971 ,  H04L27/2096 ,  H04L27/2649 ,  H04L27/2697 ,  H04L2025/03375

Abstract: Provided is an optical OFDM receiver. The optical OFDM receiver receives an optical signal dependent on the nonlinearity of a transmitter. The optical OFDM receives includes an optical down converter, a nonlinearity compensator, and an OFDM demodulator. The optical down converter converts the optical signal into an electrical signal. The nonlinearity compensator filters the electrical signal, for compensating distortion which is added to the optical signal when the transmitter performs optical modulation. The OFDM demodulator demodulates the distortion-compensated electrical signal in an OFDM scheme.

Abstract translation: 提供了一种光学OFDM接收机。 光OFDM接收机根据发射机的非线性接收光信号。 光OFDM接收包括光下变频器，非线性补偿器和OFDM解调器。 光学下变频器将光信号转换成电信号。 非线性补偿器对电信号进行滤波，用于补偿当发射机进行光调制时加到光信号上的失真。 OFDM解调器以OFDM方案解调失真补偿电信号。

公开(公告)号：US20130114956A1

公开(公告)日：2013-05-09

申请号：US13610063

申请日：2012-09-11

Applicant: Jong-Hoi Kim

Inventor： Jong-Hoi Kim

IPC: H04B10/08

CPC classification number: H04B10/677 ,  H04B10/2572 ,  H04L27/223 ,  H04L27/2331

Abstract: Disclosed is a DPSK optical receiver capable of compensating for a polarization phase difference. The DPSK optical receiver according to an embodiment of the present disclosure includes: an optical splitter configured to split a received optical signal into a first optical signal and a second optical signal; an optical delay waveguide configured to delay the first optical signal; a birefringent waveguide configured to delay the second optical signal so as to compensate for a polarization phase difference at an output end; and an optical hybrid configured to generate an optical detection signal corresponding to a phase difference between the delayed first optical signal and the delayed second optical signal.

Abstract translation: 公开了能够补偿极化相位差的DPSK光接收机。 根据本公开实施例的DPSK光接收机包括：分配器，被配置为将接收到的光信号分割为第一光信号和第二光信号; 光延迟波导，被配置为延迟所述第一光信号; 双折射波导，被配置为延迟所述第二光信号，以补偿输出端的极化相位差; 以及光混合器，被配置为产生对应于延迟的第一光信号和延迟的第二光信号之间的相位差的光检测信号。

公开(公告)号：US20120300180A1

公开(公告)日：2012-11-29

申请号：US13477677

申请日：2012-05-22

Applicant: Wook-jae JEON ,  Jong-hoi KIM

Inventor： Wook-jae JEON ,  Jong-hoi KIM

IPC: G03B21/28

CPC classification number: G02B27/1033 ,  G02B27/149 ,  G03B21/2033 ,  G03B21/2066 ,  G03B33/12

Abstract: An image projection apparatus is provided, which includes an illumination unit which generates illumination light, a first prism which receives the illumination light from the illumination unit and performs total reflection of the illumination light, a reflection mirror which receives the illumination light from the first prism and reflects the illumination light, an image forming unit which forms an image from the illumination light that is reflected from the reflection mirror, and a second prism which performs total reflection of the image that is formed by the image forming unit toward a screen.

Abstract translation: 提供一种图像投影装置，其包括产生照明光的照明单元，接收来自照明单元的照明光并执行照明光的全反射的第一棱镜，接收来自第一棱镜的照明光的反射镜 并且反射照明光，从反射镜反射的照明光形成图像的图像形成单元，以及执行由图像形成单元形成的图像对屏幕的全反射的第二棱镜。

公开(公告)号：US20120155887A1

公开(公告)日：2012-06-21

申请号：US13301814

申请日：2011-11-22

Applicant: Chun Ju YOUN ,  Yong-Hwan Kwon ,  Duk Jun Kim ,  Jong-Hoi Kim ,  Joong-Seon Choe ,  Kwang-Seong Choi ,  Eun Soo Nam

Inventor： Chun Ju YOUN ,  Yong-Hwan Kwon ,  Duk Jun Kim ,  Jong-Hoi Kim ,  Joong-Seon Choe ,  Kwang-Seong Choi ,  Eun Soo Nam

IPC: H04B10/06 ,  H04B10/04

CPC classification number: H04B10/548 ,  H04B10/0775 ,  H04B10/588 ,  H04B10/613 ,  H04B10/6165 ,  H04L27/2096 ,  H04L27/2613 ,  H04L27/2657 ,  H04L27/2675 ,  H04L27/2692 ,  H04L27/2697

Abstract: Disclosed are a method and an apparatus for transmitting and receiving coherent optical OFDM. The apparatus includes: a transmitted OFDM digital signal processing unit outputting an in-phase (I) component digital signal and a quadrature phase (Q) component digital signal; a digital-analog converter converting the in-phase (I)-component digital signal and the quadrature-phase (Q)-component digital signal into an in-phase (I)-component analog signal and a quadrature-phase (Q)-component analog signal, respectively; an adder adding an additional pilot tone signal to each of the in-phase (I)-component analog signal and the quadrature-phase (Q)-component analog signal outputted from the digital-analog converter; and an optical I/Q modulator up-converting the in-phase (I)-component analog signal added with the additional pilot tone signal and the quadrature-phase (Q)-component analog signal added with the additional pilot tone signal to an optical domain to output a coherent optical OFDM signal including the additional pilot tone signal.

Abstract translation: 公开了用于发送和接收相干光OFDM的方法和装置。 该装置包括：发送的OFDM数字信号处理单元，输出同相（I）分量数字信号和正交相位（Q）分量数字信号; 将同相（I）分量数字信号和正交相位（Q））数字信号转换为同相（I）分量模拟信号和正交相位（Q）分量数字信号的数模转换器， 分量模拟信号; 对从数模转换器输出的同相（I）分量模拟信号和正交相（Q））模拟信号中的每一个加上附加导频音信号的加法器; 以及光学I / Q调制器，将添加有附加导频音信号的同相（I）分量模拟信号和加上附加导频音信号的正交相位（Q））模拟信号上变频到光 域以输出包括附加导频音信号的相干光OFDM信号。

公开(公告)号：US20110142398A1

公开(公告)日：2011-06-16

申请号：US12788237

申请日：2010-05-26

Applicant: Joong-Seon Choe ,  Yong-Hwan Kwon ,  Chun Ju Youn ,  Jong-Hoi Kim ,  Kwang-Seong Choi ,  Eun Soo Nam

Inventor： Joong-Seon Choe ,  Yong-Hwan Kwon ,  Chun Ju Youn ,  Jong-Hoi Kim ,  Kwang-Seong Choi ,  Eun Soo Nam

IPC: G02B6/38

CPC classification number: G02B6/3825 ,  G02B6/3894

Abstract: Provided are an adapter assembly and method for compensating optical fibers for a length difference. The adapter assembly includes a first adapter, a second adapter, and a member. The first adapter is configured to be connected to at least one optical communication unit. The second adapter is configured to be connected to at least another optical communication unit and be coupled to the first adapter. The member is configured to be interposed between the first and second adapters for providing an optical signal transmission path between the optical communication units. Owing to the member, a length difference between optical fibers can be compensated for.

Abstract translation: 提供一种用于补偿光纤长度差的适配器组件和方法。 适配器组件包括第一适配器，第二适配器和构件。 第一适配器被配置为连接到至少一个光通信单元。 第二适配器被配置为连接到至少另一个光通信单元并且被耦合到第一适配器。 构件被配置为插入在第一和第二适配器之间，以在光通信单元之间提供光信号传输路径。 由于该构件，可以补偿光纤之间的长度差。

公开(公告)号：US20110064422A1

公开(公告)日：2011-03-17

申请号：US12765360

申请日：2010-04-22

Applicant: Jong-Hoi Kim ,  Eun Soo Nam ,  Yong-Hwan Kwon ,  Chun Ju Youn ,  Joong-Seon Choe ,  Kwang-Seong Choi

Inventor： Jong-Hoi Kim ,  Eun Soo Nam ,  Yong-Hwan Kwon ,  Chun Ju Youn ,  Joong-Seon Choe ,  Kwang-Seong Choi

IPC: H04B10/06 ,  G02B6/42

CPC classification number: H04B10/614 ,  G02B6/12004 ,  H04B10/60

Abstract: Provided is an optical receiver used for an optical communication system, more particularly, a polarization split-phase shift demodulation coherent optical receiver. An optical hybrid includes a first optical splitter, a phase shift waveguide, a second optical splitter, and an optical coupler. The first optical splitter splits a first input optical signal to output first output optical signals. The phase shift waveguide receives the first output optical signals and controls and outputs the first output optical signals such that the first output optical signals have different phases. The second optical splitter splits a second input optical signal to output a plurality of second output optical signals. The optical coupler couples the first output optical signals one-to-one with the second output optical signals, respectively.

Abstract translation: 提供了一种用于光通信系统的光接收机，更具体地说，是一种偏振分相相移解调相干光接收机。 光学混合器包括第一分光器，相移波导，第二分光器和光耦合器。 第一光分路器分离第一输入光信号以输出第一输出光信号。 相移波导接收第一输出光信号并控制并输出第一输出光信号，使得第一输出光信号具有不同的相位。 第二光分路器分割第二输入光信号以输出多个第二输出光信号。 光耦合器将第一输出光信号与第二输出光信号分别耦合一对一。

公开(公告)号：US20110002583A1

公开(公告)日：2011-01-06

申请号：US12764786

申请日：2010-04-21

Applicant: Oh-Kee Kwon ,  Chul-Wook Lee ,  Dong-Hun Lee ,  Jong-Hoi Kim ,  Eundeok Sim ,  Yongsoon Baek

Inventor： Oh-Kee Kwon ,  Chul-Wook Lee ,  Dong-Hun Lee ,  Jong-Hoi Kim ,  Eundeok Sim ,  Yongsoon Baek

IPC: G02B6/28 ,  G02B6/34

CPC classification number: G02B6/12014 ,  G02B6/12009 ,  G02B6/29308 ,  G02B6/2931

Abstract: Provided is an optical device. The optical device includes a multiplexer/demultiplexer, a multimode interference (MMI) coupler, a first waveguide, and second waveguides. The multiplexer/demultiplexer splits optical signals having a plurality of channels and received through a first port according to their wavelength to provide the split optical signals to second ports, or providing input optical signals having wavelengths difference from each other and received through the second ports to the first port. The multimode interference (MMI) coupler is connected to the first port. The first waveguide is connected to the MMI coupler. The second waveguides are connected to the second ports. The MMI coupler has a width decreasing toward the multiplexer/demultiplexer.

Abstract translation: 提供了一种光学装置。 光学装置包括多路复用器/解复用器，多模干涉（MMI）耦合器，第一波导和第二波导。 多路复用器/解复用器根据其波长分离具有多个信道并通过第一端口接收的光信号，以将分离的光信号提供给第二端口，或提供具有彼此不同的波长并通过第二端口接收的输入光信号 第一个港口。 多模干扰（MMI）耦合器连接到第一个端口。 第一个波导连接到MMI耦合器。 第二波导连接到第二端口。 MMI耦合器的宽度朝向多路复用器/解复用器递减。

公开(公告)号：US07782909B2

公开(公告)日：2010-08-24

申请号：US12192527

申请日：2008-08-15

Applicant: Kwang Ryong Oh ,  Jong Hoi Kim ,  Dong Churl Kim ,  Oh Kee Kwon ,  Ki Soo Kim ,  Ki Hong Yoon

Inventor： Kwang Ryong Oh ,  Jong Hoi Kim ,  Dong Churl Kim ,  Oh Kee Kwon ,  Ki Soo Kim ,  Ki Hong Yoon

IPC: H01S3/30

CPC classification number: G02F1/3534 ,  G02F2203/13 ,  H01S1/02 ,  H01S5/141 ,  H01S5/4062 ,  H01S5/4087

Abstract: Provided is a frequency-tunable terahertz light source device. The frequency-tunable terahertz light source device satisfies a Littrow diffraction condition at a wavelength and simultaneously satisfies a Littman-Metcalf diffraction condition at another wavelength using a double diffraction grating having two grating periods. Thus, oscillations simultaneously occur at the two different wavelengths, such that a terahertz wave can be stably generated by beating of the two oscillation wavelengths. In addition, the frequency-tunable terahertz light source device can readily change a frequency up to several terahertz and can be fabricated in a small size.

Abstract translation: 提供了一种频率可调的太赫兹光源装置。 频率可调谐的太赫兹光源装置在波长处满足Littrow衍射条件，并且使用具有两个光栅周期的双衍射光栅同时满足另一个波长的Littman-Metcalf衍射条件。 因此，振荡同时发生在两个不同的波长处，使得可以通过拍摄两个振荡波长来稳定地产生太赫兹波。 此外，频率可调谐的太赫兹光源装置可以容易地将频率改变到几个太赫兹，并且可以以小尺寸制造。

公开(公告)号：US07561603B2

公开(公告)日：2009-07-14

申请号：US11176743

申请日：2005-07-07

Applicant: Oh Kee Kwon ,  Kwang Ryong Oh ,  Kang Ho Kim ,  Jong Hoi Kim ,  Hyun Soo Kim

Inventor： Oh Kee Kwon ,  Kwang Ryong Oh ,  Kang Ho Kim ,  Jong Hoi Kim ,  Hyun Soo Kim

IPC: H01S3/10 ,  H01S3/098

CPC classification number: H01S5/06255 ,  H01S5/026 ,  H01S5/065 ,  H01S5/0654 ,  H01S5/0656 ,  H01S5/1021 ,  H01S5/1025 ,  H01S5/1039

Abstract: Provided is an integrated semiconductor light source using locking characteristic by an external light injection, including: an active region controlling an optical gain and an optical output by current injection; and a passive region having a structure integrated with the active region and moving a cavity mode by current injection or voltage application to lock injection light.

Abstract translation: 提供了一种使用通过外部光注入的锁定特性的集成半导体光源，包括：通过电流注入控制光学增益和光学输出的有源区域; 以及具有与有源区域集成的结构的无源区域，并且通过电流注入或电压施加来移动腔模以锁定注入光。