公开(公告)号：KR1020140077734A

公开(公告)日：2014-06-24

申请号：KR1020120146841

申请日：2012-12-14

Applicant: 한국전자통신연구원

Inventor： 윤천주 ,  김종회 ,  최중선 ,  김덕준 ,  권용환 ,  남은수

IPC: H04B10/07

CPC classification number: H04B10/0731 ,  H04B10/613 ,  H04L27/223 ,  H04L27/364 ,  H04L2027/0083

Abstract: The present invention relates to an IQ imbalance measuring device and an IQ imbalance measuring method and, more specifically, to an IQ imbalance measuring device and an IQ imbalance measuring method for an optical receiver. The IQ imbalance measuring device according to the present invention comprises a light generating unit generating an optical signal and a reference signal and providing an optical receiver with the optical signal and the reference signal; a graph creating unit creating a Lissajous figure by using an I signal and a Q signal output from the optical receiver in response to the optical signal and the reference signal; and a calculating unit calculating IQ imbalance of the optical receiver with reference to the Lissajous figure. The IQ imbalance measuring device and the IQ imbalance measuring method according to the present invention can measure IQ imbalance for the optical receiver with few calculations on a low speed signal.

Abstract translation: 本发明涉及IQ不平衡测量装置和IQ不平衡测量方法，更具体地说，涉及一种用于光接收机的IQ不平衡测量装置和IQ不平衡测量方法。 根据本发明的IQ不平衡测量装置包括产生光信号和参考信号的光产生单元，并向光接收器提供光信号和参考信号; 图形生成单元，响应于光信号和参考信号，通过使用从光接收器输出的I信号和Q信号来创建李萨如图; 以及计算单元，参考利萨如图来计算光接收机的IQ不平衡。 根据本发明的IQ不平衡测量装置和IQ不平衡测量方法可以在低速信号上进行很少的计算来测量光接收机的IQ不平衡。

公开(公告)号：KR1020110068048A

公开(公告)日：2011-06-22

申请号：KR1020090124872

申请日：2009-12-15

Applicant: 한국전자통신연구원

Inventor： 최중선 ,  권용환 ,  윤천주 ,  김종회 ,  최광성 ,  남은수

IPC: G02B6/38

CPC classification number: G02B6/3825 ,  G02B6/3894

Abstract: PURPOSE: An adapter assembly and a method for compensating the length difference of optical fiber using the same are provided to compensate length differences by securing the transferring path of an optical signal. CONSTITUTION: A first adapter(10) is in connection with at least one optical communication unit. A second adapter(30) is in connection with at least one another optical communication unit. The second adapter is combined with the first adapter. An intermediate unit(21) is sandwiched between the first adapter and the second adapter. The intermediate unit secures the transferring path of an optical signal between the optical communication units.

Abstract translation: 目的：提供一种用于补偿使用其的光纤的长度差的适配器组件和方法，以通过确保光信号的传送路径来补偿长度差异。 构成：第一适配器（10）与至少一个光通信单元连接。 第二适配器（30）与至少另一个光通信单元连接。 第二个适配器与第一个适配器组合。 中间单元（21）夹在第一适配器和第二适配器之间。 中间单元在光通信单元之间固定光信号的传送路径。

公开(公告)号：KR1020110062905A

公开(公告)日：2011-06-10

申请号：KR1020090119773

申请日：2009-12-04

Applicant: 한국전자통신연구원

Inventor： 윤천주 ,  권용환 ,  남은수 ,  김종회 ,  최중선 ,  최광성

IPC: H04B10/60 ,  H04B10/58

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

Abstract: PURPOSE: An optical OFDM receiver and optical signal receiving method thereof are provided to solve a non-linear which is caused by an optical modulator and an optical channel. CONSTITUTION: An optical down converter(210) converts an optical signal into an electrical signal. A non-linear compensation unit(220) filters the electrical signal for compensating the influence of distortion added to the optical signal when optical modulating of a transmitter.

Abstract translation: 目的：提供一种光学OFDM接收机及其光信号接收方法，以解决由光调制器和光通道引起的非线性。 构成：光学下变频器（210）将光信号转换成电信号。 当对发射机进行光调制时，非线性补偿单元（220）对电信号进行滤波以补偿添加到光信号的失真的影响。

公开(公告)号：KR1020110030136A

公开(公告)日：2011-03-23

申请号：KR1020090088127

申请日：2009-09-17

Applicant: 한국전자통신연구원

Inventor： 김종회 ,  남은수 ,  권용환 ,  윤천주 ,  최중선 ,  최광성

IPC: H04B10/61 ,  H04B10/25

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

Abstract: PURPOSE: A polarizing divider, an optical hybrid, and an optical receiver including the same are provided to configure the same waveguide layer structure and to easily integrate a single board. CONSTITUTION: First to fourth phase shift wave guides(143_1~143_4) receive a first output optical signal. The first to fourth phase shift wave guides control the shift wave guides to the first output optical signal. A second optical splitter(142) distributes a second input optical signal and outputs a second optical signal. The first to fourth phase shift wave guides combine a first optical signal distributer and a second optical signal distributer.

Abstract translation: 目的：提供一种偏振分光器，光学混合器和包括该偏振分光器的光学接收器，以配置相同的波导层结构并容易地集成单个板。 构成：第一至第四移相波导（143_1〜143_4）接收第一输出光信号。 第一至第四移相波导将移位波导控制到第一输出光信号。 第二光分路器（142）分配第二输入光信号并输出​​第二光信号。 第一至第四移相波导组合第一光信号分配器和第二光信号分配器。

公开(公告)号：KR1020080052234A

公开(公告)日：2008-06-11

申请号：KR1020070057090

申请日：2007-06-12

Applicant: 한국전자통신연구원

Inventor： 윤천주 ,  노태곤

IPC: H04B10/70 ,  H04B10/85 ,  H04B10/60 ,  G02B6/00

CPC classification number: H04B10/70 ,  H04L9/0858

Abstract: A polarization-insensitive one way quantum key receiver and a transceiver system are provided to perform quantum cryptography communication at high speed without being affected by polarization and phase drift in quantum key distribution systems and to build a system economically in addition by performing passive compensation rather than active compensation. A polarization-insensitive one way quantum key receiver comprises a polarization-insensitive optical phase modulator part(310), an asymmetric Mach Zehnder interferometer(320), and photon detectors(330). The polarization-insensitive optical phase modulator part is for modulating the phase of an input optical pulse signal regardless of a polarization state of the optical pulse signal. The asymmetric Mach Zehnder interferometer causes interference in an optical signal photons received from the polarization-insensitive optical phase modulator part and outputs to the photon detectors. The photon detectors detect input photons and generate an electrical signal. Here, depending on whether an optical signal outputted from the asymmetric Mach Zehnder interferometer causes constructive interference or destructive interference, a photon is detected at one of the two photon detectors.

Abstract translation: 提供极化不敏感的单向量子密钥接收机和收发器系统以高速执行量子密码通信，而不受量子密钥分发系统中的极化和相位漂移的影响，并通过执行被动补偿而不经济地构建系统， 积极补偿。 极化不敏感单向量子密钥接收机包括偏振不敏感光相位调制器部分（310），不对称马赫曾德干涉仪（320）和光子检测器（330）。 偏振不敏感光相位调制器部分用于调制输入光脉冲信号的相位，而与光脉冲信号的偏振状态无关。 非对称的马赫策德干涉仪对从偏振不敏感光相位调制器部分接收的光信号光子产生干涉，并输出到光子检测器。 光子检测器检测输入光子并产生电信号。 这里，根据从非对称马赫策德尔干涉仪输出的光信号是否引起相当大的干涉或相消干涉，在两个光子检测器之一处检测到光子。

公开(公告)号：KR1020070061016A

公开(公告)日：2007-06-13

申请号：KR1020060030954

申请日：2006-04-05

Applicant: 한국전자통신연구원

Inventor： 윤천주 ,  노태곤 ,  홍종철 ,  김헌오 ,  정태형

IPC: H04B10/85 ,  G06F15/00 ,  H04B10/40

CPC classification number: H04L9/0858

Abstract: An apparatus and a method for automatically transmitting/receiving compensation quantum cryptography at a high speed are provided to solve a problem of an existing system in which a transmission rate is limited due to Rayleigh scattering of an optical fiber by including a wavelength conversion unit in a quantum signal transmitter and an optical filter for removing an optical signal caused by the Rayleigh scattering in a quantum signal receiver. A wavelength conversion unit converts an optical pulse signal having the first wavelength into an optical pulse signal having the second wavelength(S410). An optical attenuator reduces strength of the wavelength-converted optical pulse signal such that the optical pulse signal has strength of a single photon(S420). Reduced phase of the optical pulse signal is shifted in an optical phase modulator(S430). A Faraday mirror rotates polarization of the phase-shifted optical pulse signal by 90 degrees to reflect it(S440). A polarization divider of a quantum cryptography receiver(Bob) receives the reflected optical pulse signal and divides it into vertical polarization components(S450). The optical phase modulator shifts the phase of a signal having the first polarization component among the polarization-divided optical pulse signal(S460). There occurs interference between the optical pulse signal phase-shifted by an optical coupler and a signal having the second polarization component among the polarization-divided optical pulse signal(S470). An optical filter allows the second wavelength optical pulse signal among the interference signals to pass therethrough(S480). A photon detector detects an output signal of the optical filter(S490).

Abstract translation: 提供了一种高速自动发送/接收补偿量子密码术的装置和方法，以解决由于光纤的瑞利散射而使透射率受到限制的现有系统的问题，包括波长转换单元 量子信号发射机和用于去除由量子信号接收机中的瑞利散射引起的光信号的滤光器。 波长转换单元将具有第一波长的光脉冲信号转换为具有第二波长的光脉冲信号（S410）。 光衰减器降低波长转换的光脉冲信号的强度，使得光脉冲信号具有单个光子的强度（S420）。 在光学相位调制器中移动光脉冲信号的相位减小（S430）。 法拉第镜将相移光脉冲信号的极化旋转90度以反映（S440）。 量子加密接收器（Bob）的偏振分束器接收反射的光脉冲信号并将其分成垂直偏振分量（S450）。 光相位调制器在偏振光分割的光脉冲信号中移位具有第一偏振分量的信号的相位（S460）。 通过光耦合器相移的光脉冲信号与偏振光分割光脉冲信号中具有第二偏振分量的信号之间存在干涉（S470）。 滤光器允许干涉信号中的第二波长光脉冲信号通过（S480）。 光子检测器检测滤光器的输出信号（S490）。