公开(公告)号：US08477939B2

公开(公告)日：2013-07-02

申请号：US12446810

申请日：2007-11-28

Applicant: Chun Ju Youn ,  Tae Gon Noh

Inventor： Chun Ju Youn ,  Tae Gon Noh

IPC: H04L9/00

CPC classification number: H04B10/70 ,  H04L9/0858

Abstract: Provided are an apparatus for receiving a quantum cryptographic key and an apparatus for transmitting and receiving a quantum cryptographic key at high speed without polarization drift of an optical pulse signal and phase drift of an interferometer. The apparatus for receiving a quantum key includes: a polarization-insensitive optical phase modulator parts for receiving an optical pulse signal, and modulating and outputting a phase of the optical pulse signal without being affected by the polarization state of the optical pulse signal; an asymmetric Mach-Zehnder interferometer for causing interference in and outputting the optical pulse signal received from the polarization-insensitive optical phase modulator parts; and a photon detectors for detecting the optical pulse signal received from the asymmetric Mach-Zehnder interferometer. According to the apparatuses, it is possible to perform quantum cryptography communication at high speed without being affected by polarization drift of an optical pulse signal and phase drift of an interferometer.

Abstract translation: 提供了一种用于接收量子密钥的装置，以及用于高速率发送和接收量子密钥的装置，没有光脉冲信号的偏振漂移和干涉仪的相位漂移。 用于接收量子密钥的装置包括：用于接收光脉冲信号的偏振不敏感光相位调制器部分，并且不受光脉冲信号的偏振状态的影响而调制和输出光脉冲信号的相位; 用于对从偏振不敏感光相位调制器部分接收的光脉冲信号进行干扰并输出的非对称马赫 - 曾德干涉仪; 以及用于检测从不对称Mach-Zehnder干涉仪接收的光脉冲信号的光子检测器。 根据该装置，可以不受光脉冲信号的偏振漂移和干涉仪的相位漂移的影响而高速进行量子密码通信。

公开(公告)号：US07933520B2

公开(公告)日：2011-04-26

申请号：US11293296

申请日：2005-12-05

Applicant: Chun-ju Youn ,  Hyun-chin Kim ,  Yeong-bae Yeo ,  Young-kwang Seo ,  Keun-joo Park

Inventor： Chun-ju Youn ,  Hyun-chin Kim ,  Yeong-bae Yeo ,  Young-kwang Seo ,  Keun-joo Park

IPC: H04B10/04 ,  H04J14/02

CPC classification number: H04B10/506 ,  H04J14/02

Abstract: A high-speed wavelength selectable optical source and a method thereof are disclosed. The wavelength selectable optical source includes at least one optical source having a multimode oscillation spectrum, a demultiplexer and an optical switch for extracting light having a certain selected wavelength. A certain wavelength can be selected among the multimode wavelengths using the demultiplexer and the optical switch, and thus the wavelength can discontinuously be tuned at high speed. Also, by making the light having the selected wavelength incident to the multimode optical source, the power of the output light can uniformly be maintained and maximized through injection locking.

Abstract translation: 公开了一种高速波长可选择光源及其方法。 波长可选择光源包括至少一个具有多模式振荡光谱的光源，解复用器和用于提取具有特定选定波长的光的光开关。 可以使用解复用器和光开关在多模波长中选择一定的波长，因此波长可以不连续地高速调谐。 此外，通过使具有选定波长的光入射到多模光源，输出光的功率可以通过注入锁定均匀地保持和最大化。

公开(公告)号：US07769293B2

公开(公告)日：2010-08-03

申请号：US11265164

申请日：2005-11-03

Applicant: Keun-joo Park ,  Hyun-chin Kim ,  Young-kwang Seo ,  Chun-ju Youn ,  June-koo Rhee

Inventor： Keun-joo Park ,  Hyun-chin Kim ,  Young-kwang Seo ,  Chun-ju Youn ,  June-koo Rhee

IPC: H04J14/00 ,  H04B10/20

CPC classification number: H04Q11/0005 ,  H04Q11/0066 ,  H04Q2011/0039 ,  H04Q2011/0069

Abstract: An apparatus and method for effectively transmitting a packet data and a control data of path information about the packet data in an optical packet data switching network. The method includes grouping a plurality of wavelengths into at least two wavelength bandwidths, each wavelength bandwidth being composed of neighboring wavelengths, and transmitting the optical packet data and the control data with wavelengths of different wavelength bandwidths respectively. Since the wavelength to transmit the optical packet data and the wavelength to transmit the control data has a difference from each other, a node receiving optical data easily divides the packet data and the control data.

Abstract translation: 一种用于在光分组数据交换网络中有效发送分组数据和关于分组数据的路径信息的控制数据的装置和方法。 该方法包括将多个波长分组成至少两个波长带宽，每个波长带宽由相邻波长组成，并且分别以不同波长带宽的波长传输光分组数据和控制数据。 由于发送光分组数据的波长和发送控制数据的波长彼此不同，所以接收光数据的节点容易地划分分组数据和控制数据。

公开(公告)号：US20060239682A1

公开(公告)日：2006-10-26

申请号：US11357172

申请日：2006-02-21

Applicant: Keun-joo Park ,  Hyun-chin Kim ,  Young-kwang Seo ,  Yeong-bae Yeo ,  June-koo Rhee ,  Chun-ju Youn

Inventor： Keun-joo Park ,  Hyun-chin Kim ,  Young-kwang Seo ,  Yeong-bae Yeo ,  June-koo Rhee ,  Chun-ju Youn

IPC: H04J14/00

CPC classification number: H04N9/8227 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0247 ,  H04J14/025 ,  H04J14/0282 ,  H04N5/85 ,  H04N7/17309 ,  H04N7/22 ,  H04N9/8063 ,  H04N21/23608 ,  H04N21/2383

Abstract: A time and wavelength division multiplexed passive optical network where a central office has a downstream transmitter and an upstream receiver. The downstream transmitter multiplexes and transmits downstream optical signals in a time region. The upstream receiver de-multiplexes, in a wavelength region, an upstream optical signal. An optical network unit has a downstream receiver and an upstream transmitter, where the downstream receiver de-multiplexes, in the time region, the downstream optical signals from the central office. The upstream transmitter multiplexes the upstream optical signal in the wavelength region and transmits the signal to the central office. A remote node, having an optical distributor and a wavelength division multiplexer, is connected between the central office and the optical network unit. The optical distributor distributes the downstream optical signals from the central office. The wavelength division multiplexer multiplexes, in the wavelength region, the upstream optical signal from each optical network unit.

Abstract translation: 时间和波分复用无源光网络，其中中心局具有下行发射机和上游接收机。 下行发射机在时域中复用和发送下行光信号。 上行接收器在波长区域中对上游光信号进行解复用。 光网络单元具有下行接收器和上游发射器，其中下行接收器在时域中对来自中心局的下行光信号进行解复用。 上行发射机复用波长区域中的上行光信号，并将信号发送到中心局。 具有光分配器和波分多路复用器的远程节点连接在中心局和光网络单元之间。 光学分配器分配来自中心局的下行光信号。 波分复用器在波长区域中复用来自每个光网络单元的上行光信号。

公开(公告)号：US20060093357A1

公开(公告)日：2006-05-04

申请号：US11264165

申请日：2005-11-02

Applicant: Keun-joo Park ,  Hyun-chin Kim ,  June-koo Rhee ,  Young-kwang Seo ,  Chun-ju Youn

Inventor： Keun-joo Park ,  Hyun-chin Kim ,  June-koo Rhee ,  Young-kwang Seo ,  Chun-ju Youn

IPC: H04B10/08

CPC classification number: H04B10/564 ,  H04B10/077 ,  H04B10/07955

Abstract: Apparatuses and methods are provided which suppress a surge component occurring at an optical amplifier on an optical path through which an optical burst signal is transmitted. An optical amplifier may experience a surge due to the power variation of the optical burst signal that is fed to the optical amplifier. To suppress such a surge component, a power corresponding to a number of wavelengths of an optical burst signal to be input is calculated. The optical amplifier is instructed to generate an optical signal with a power corresponding to a difference between a set value and the calculated power. The generated optical signal and the optical burst signal to be input are coupled and output according to the instruction. Thus, the optical amplifier can receive the optical signal with the constant power and the surge component at the optical amplifier can be suppressed.

Abstract translation: 提供的装置和方法，其抑制在发送光猝发信号的光路上的光放大器处发生的浪涌分量。 由于馈送到光放大器的光猝发信号的功率变化，光放大器可能经历浪涌。 为了抑制这种浪涌分量，计算与要输入的光猝发信号的波长数相对应的功率。 指示光放大器产生具有与设定值和计算功率之间的差对应的功率的光信号。 所生成的光信号和要输入的光突发信号根据该指令进行耦合和输出。 因此，光放大器可以以恒定功率接收光信号，并且可以抑制光放大器处的浪涌元件。

公开(公告)号：US20060093355A1

公开(公告)日：2006-05-04

申请号：US11265164

申请日：2005-11-03

Applicant: Keun-joo Park ,  Hyun-chin Kim ,  Young-kwang Seo ,  Chun-ju Youn ,  June-koo Rhee

Inventor： Keun-joo Park ,  Hyun-chin Kim ,  Young-kwang Seo ,  Chun-ju Youn ,  June-koo Rhee

IPC: H04B10/08

CPC classification number: H04Q11/0005 ,  H04Q11/0066 ,  H04Q2011/0039 ,  H04Q2011/0069

Abstract: An apparatus and method for effectively transmitting a packet data and a control data of path information about the packet data in an optical packet data switching network. The method includes grouping a plurality of wavelengths into at least two wavelength bandwidths, each wavelength bandwidth being composed of neighboring wavelengths, and transmitting the optical packet data and the control data with wavelengths of different wavelength bandwidths respectively. Since the wavelength to transmit the optical packet data and the wavelength to transmit the control data has a difference from each other, a node receiving optical data easily divides the packet data and the control data.

Abstract translation: 一种用于在光分组数据交换网络中有效发送分组数据和关于分组数据的路径信息的控制数据的装置和方法。 该方法包括将多个波长分组成至少两个波长带宽，每个波长带宽由相邻波长组成，并且分别以不同波长带宽的波长传输光分组数据和控制数据。 由于发送光分组数据的波长和发送控制数据的波长彼此不同，所以接收光数据的节点容易地划分分组数据和控制数据。

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：US08265279B2

公开(公告)日：2012-09-11

申请号：US12499050

申请日：2009-07-07

Applicant: Chun-Ju Youn ,  Tae-Gon Noh

Inventor： Chun-Ju Youn ,  Tae-Gon Noh

IPC: H04K1/00

CPC classification number: H04L9/0858 ,  H04B10/70

Abstract: Provided is a polarization coding quantum cryptography system. The quantum cryptography includes a light source, a quantum channel, an optical path selector, and a path-dependent polarization selector. The light source generates a signal light. The quantum channel is used as a path to transmit the signal light to a receiver unit. The optical path selector is disposed between the light source and the quantum channel to transmit the signal light to one of a plurality of propagation paths. The path-dependent polarization selector is disposed between the optical path selector and the quantum channel. Herein, the path-dependent polarization selector is configured to determine the polarization direction of the signal light according to the propagation path of the signal light.

Abstract translation: 提供了一种偏振编码量子密码系统。 量子密码术包括光源，量子通道，光路选择器和路径依赖偏振选择器。 光源产生信号灯。 量子通道用作将信号光传输到接收器单元的路径。 光路选择器设置在光源和量子通道之间，以将信号光传输到多个传播路径之一。 路径相关偏振选择器设置在光路选择器和量子通道之间。 这里，路径相关偏振选择器被配置为根据信号光的传播路径来确定信号光的偏振方向。

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。