公开(公告)号：KR1020070025885A

公开(公告)日：2007-03-08

申请号：KR1020050098651

申请日：2005-10-19

Applicant: 한국과학기술원

Inventor： 이창희 ,  박근열 ,  문실구

IPC: H04B10/2581 ,  H04B10/2507 ,  H04J14/02 ,  H04L12/28

CPC classification number: H04J14/0226 ,  H04B10/506 ,  H04B10/572 ,  H04J14/02 ,  H04J14/0246 ,  H04J14/025 ,  H04J14/0282

Abstract: A WDM(Wavelength-Division Multiplexed) PON(Passive Optical Network) for reducing degradation of a noise characteristic of a wavelength-locked Fabry-Perot LD(Laser Diode) is provided to maximally use reduction effect of output noise of a wavelength-seeded reflective semiconductor optical amplifier, thus high-speed transmission at more than 1Gb/s is available. A central office(100) comprises the followings. A BLS(Broadband Light Source)(130b) forms broadband light. The first WDM filter filters the formed light, and has a wider bandwidth than that of the injected light. The light filtered from the first WDM filter is injected into plural optical transceivers(110a-110n). A remote node(200) comprises the second WDM filter filters which filters the broadband light formed in the BLS(130b) to inject the filtered light into plural ONTs(Optical Network Terminations)(300), and which has a wider bandwidth than that of the injected light.

Abstract translation: 提供了用于减少波长锁定法布里 - 珀罗LD（激光二极管）的噪声特性降低的WDM（波分复用）​​PON（无源光网络），以最大限度地利用波长种子反射的输出噪声的降低效果 半导体光放大器，因此高速传输超过1Gb / s。 中央办公室（100）包括以下内容。 BLS（宽带光源）（130b）形成宽带光。 第一个WDM滤波器对形成的光进行滤波，并且具有比注入光更宽的带宽。 从第一WDM滤波器滤波的光被注入到多个光收发器（110a-110n）中。 远程节点（200）包括第二WDM滤波器滤波器，其对形成在BLS（130b）中的宽带光进行滤波，以将经滤波的光注入到多个ONT（光网络终端）（300）中，并且具有比 注射光。

公开(公告)号：KR100683833B1

公开(公告)日：2007-02-16

申请号：KR1020050131999

申请日：2005-12-28

Applicant: 한국과학기술원

Inventor： 이창희 ,  이상묵 ,  문실구

IPC: H04B10/2581 ,  H04L12/28

Abstract: A multi-star WDM(Wavelength Division Multiplexing) PON(Passive Optical Network) using a wavelength allocation method is provided to easily maintain and manage a system by using the same type of an optical transmitter/receiver having a filter that splits only a base band, in every subscriber unit. A central station includes a WDM and an optical transmitter/receiver. The first RN(Remote Node) is connected with the central station by an optical fiber, splits downlink signal wavelength bands into several lower wavelength bands and combines uplink signal wavelength bands split into several lower wavelength bands, and includes a BSWDM(Band Splitting WDM) in which a guard band between basic bands used as an uplink signal wavelength band and a downlink signal wavelength band follows a certain equation. A plurality of the second RNs are connected with the first RN through several optical fibers and includes a WDM. ONTs(Optical Network Terminations) are connected with the second RNs through individual optical fibers and include an optical transmitter/receiver.

Abstract translation: 提供使用波长分配方法的多星级WDM（波分复用）​​PON（无源光网络），以通过使用具有仅分割基带的滤波器的相同类型的光发送器/接收器来容易地维护和管理系统 ，在每个用户单元中。 中心站包括WDM和光发射机/接收机。 第一个RN（远程节点）通过光纤与中心站连接，将下行链路信号波长带分成几个较低波长带，并组合分成几个较低波长带的上行链路信号波长带，并且包括BSWDM（波段分离WDM） 其中用作上行链路信号波段和下行链路信号波段的基带之间的保护带遵循一定的等式。 多个第二RN通过多根光纤与第一RN连接，并且包括WDM。 ONT（光网络终端）通过单根光纤与第二个RN连接，并包括光发射机/接收机。

公开(公告)号：KR1020100040206A

公开(公告)日：2010-04-19

申请号：KR1020080099329

申请日：2008-10-09

Applicant: 한국과학기술원

Inventor： 이창희 ,  이종훈 ,  최기만 ,  문실구 ,  문정형 ,  이훈근 ,  김준영 ,  오상민

IPC: H04B10/071 ,  H04B10/2581

CPC classification number: H04B10/0771 ,  G01M11/3136 ,  H04B10/071

Abstract: PURPOSE: A fault localization method in a passive optical network, a fault localization apparatus, and a passive optical network with the same are provided to use monitoring technology of OTDR and to monitor errors of an optical path which is branched regardless of the kind of the passive optical network. CONSTITUTION: A Powering Unit is provided in a central base station and provides power and control information to a remote node to selective compose optical path of the remote node. An optical time domain reflectometer(OTDR Unit) is provided in the central base station and provides a monitoring signal for monitoring the optical path. A path setting unit is provided in the remote node and sets the optical path so that the monitoring signal is selectively combined with multiple distribution optical fibers. A Control Unit uses the power and control information in order to set the optical path of the remote node to the path setting unit.

Abstract translation: 目的：提供一种无源光网络中的故障定位方法，故障定位装置和具有该无源光网络的无源光网络，以使用OTDR的监控技术，并监控分支的光路的错误，无论其类型如何 无源光网络。 构成：在中央基站中提供供电单元，并向远程节点提供电力和控制信息以选择性地组成远程节点的光路。 在中央基站提供光时域反射计（OTDR Unit），并提供监测光路的监控信号。 路径设置单元设置在远程节点中并且设置光路，使得监视信号与多个分配光纤选择性地组合。 控制单元使用电源和控制信息来设置远程节点的路径到路径设置单元。

公开(公告)号：KR1020080097086A

公开(公告)日：2008-11-04

申请号：KR1020070042231

申请日：2007-04-30

Applicant: 한국과학기술원

Inventor： 이창희 ,  최기만 ,  문실구 ,  문정형 ,  이훈근

IPC: H04B10/27 ,  H04B10/25

CPC classification number: H04J14/0227

Abstract: A method of assigning wavelength bands for broadband transmission is provided to increase the number of subscribers and enable the broadband transmission by using a WDM-filter as maintaining the infrastructure of an existing subscriber loop network as it is. An existing SMF and the cyclic property of AWG within a WDM-PON are used. One or more third wavelength division multiplexer filter(WDM3) and one or more fifth WDM filter(WDM5), for combining or separates the A-band and or from B-band, are respectively added to the rear ends of the cyclic first AWG and the cyclic second AWG which are positioned at an OLT and RN. Therefore, the B-band can be used as the new transmission band.

Abstract translation: 提供分配用于宽带传输的波长带的方法以增加用户数量，并且通过使用WDM滤波器来实现宽带传输，因为维护现有用户环路网络的基础设施。 使用现有的SMF和WDM-PON内的AWG的循环特性。 用于将A波段和/或B波段组合或分离的一个或多个第三波分多路复用器滤波器（WDM3）和一个或多个第五WDM滤波器（WDM5）分别被添加到循环第一AWG的后端，以及 定位在OLT和RN处的循环第二AWG。 因此，B波段可以用作新的传输频带。

公开(公告)号：KR100813897B1

公开(公告)日：2008-03-18

申请号：KR1020060109544

申请日：2006-11-07

Applicant: 한국과학기술원

Inventor： 이창희 ,  최기만 ,  문실구 ,  문정형 ,  이훈근

IPC: H04B10/2581 ,  H04B10/27 ,  H04L12/24

CPC classification number: H04J14/02 ,  H04J14/0201 ,  H04J14/0226 ,  H04J14/0227 ,  H04J14/0247 ,  H04J14/0252 ,  H04J14/0282 ,  H04J2014/0253

Abstract: A method and a network structure for upgrading a legacy PON into a next-generation PON based on a WDM-PON are provided to upgrade the legacy PON into the next-generation PON by using wavelength band combining/splitting apparatuses, thereby maintaining a currently used TDM(Time Division Multiplex)-based subscriber network system, using a preinstalled optical fiber and providing a broadband service through an increase of the number subscribers and the extension of bandwidth. A first wavelength band combining/splitting apparatus is positioned between a single mode optical fiber and a first OLT(Optical Line Termination) so that a second OLT which shares the single mode optical fiber and is used in a WDM-PON(Wavelength Division Multiplexing Passive Optical Network) can be added within a different CO(Central Office) which is positioned at a position different from that of a CO. A second wavelength band combining/splitting apparatus is positioned in the front end of a splitter. An AWG(Arrayed Waveguide Grating) is connected to the second wavelength band combining/splitting apparatus within an RN(Remote Node) or a different RN at a position different from that of the RN, and can be connected to at least one second group ONT(Optical Network Termination) by at least one second group splitting optical fiber.

Abstract translation: 提供了一种基于WDM-PON将传统PON升级为下一代PON的方法和网络结构，通过使用波段组合/分离设备将传统PON升级为下一代PON，从而维持当前使用的 基于TDM（时分复用）的用户网络系统，使用预安装的光纤，并通过增加用户数量和带宽扩展来提供宽带服务。 第一波段组合/分离装置位于单模光纤与第一OLT（光线路终端）之间，以便共享单模光纤并用于WDM-PON（波分多路复用无源）的第二OLT 光网络）可以添加在不同于CO的位置的不同的CO（中心局）中。第二波段组合/分离装置位于分离器的前端。 一个AWG（阵列波导光栅）连接到与RN不同的位置的RN（远程节点）或不同RN内的第二波段组合/分离装置，并且可以连接至少一个第二组ONT （光网络终端）通过至少一个第二组分裂光纤。

公开(公告)号：KR100612617B1

公开(公告)日：2006-08-17

申请号：KR1020030065956

申请日：2003-09-23

Applicant: 한국과학기술원

Inventor： 이창희 ,  홍광표 ,  백진석 ,  김성만 ,  이상묵 ,  문실구

IPC: H04B10/25 ,  H04B10/2581

CPC classification number: H04B10/40

Abstract: 본 발명의 중앙국과 광섬유를 통해 연결되어 광신호를 송수신하는 가입자 망 접속 장치는, 상기 중앙국으로부터 전송되는 다운 스트림의 데이터 및 영상 채널을 수신하는 고속 수신부와; 상기 중앙국에 송신할 업 스트림의 데이터 및 영상채널을 생성하는 고속 구동부와; 상기 중앙국으로부터 전송되는 다운 스트림의 음성 채널을 수신하는 저속 수신부와; 상기 중앙국에 송신할 업 스트림의 음성 채널을 생성하는 저속 구동부와; 상기 중앙국으로부터 전송되는 다운 스트림의 데이터 및 영상 채널과 음성 채널을 전기신호로 변환하여 상기 고속 수신부와 저속 수신부에게 제공하는 광 검출부와; 상기 고속 구동부와 저속 구동부에서 생성된 업 스트림의 데이터 및 영상 채널과 음성 채널을 광신호로 변환하여 상기 중앙국에게 전송하는 레이저 다이오드와; 상용전원의 정상 공급시 상기 고속 구동부와 고속 수신부에게 구동전원을 공급하는 전원공급부와; 상용전원의 정상 공급시 상기 전원공급부로부터 전원을 입력받아 충전하고 정전시 상기 저속 구동부와 저속 수신부에게 충전한 전원을 방전하는 충전부를 포함한다.
가입자, 망, 접속, 다이오드

公开(公告)号：KR100971676B1

公开(公告)日：2010-07-22

申请号：KR1020080099329

申请日：2008-10-09

Applicant: 한국과학기술원

Inventor： 이창희 ,  이종훈 ,  최기만 ,  문실구 ,  문정형 ,  이훈근 ,  김준영 ,  오상민

IPC: H04B10/071 ,  H04B10/2581

CPC classification number: H04B10/0771 ,  G01M11/3136 ,  H04B10/071

Abstract: 본 발명은 수동형 광 가입자 망에서 장애 검출 방법 및 검출 장치, 및 그 검출 장치를 구비한 수동형 광 가입자 망을 개시한다.
본 발명에 따른 수동형 광 가입자 망(PON)에서 장애 검출 방법은 a) 상기 PON이 상시적으로는 수동망으로 동작하다가 필요시에만 일시적으로 전력을 공급 받아 원격 노드(RN)의 광경로를 선택적으로 구성하는 단계; 및 b) 상기 선택적으로 구성된 광경로를 통해 중앙기지국(CO) 내에 위치되는 OTDR 장치의 감시 신호를 입사시켜 상기 선택적으로 구성된 광경로 상에서 발생하는 장애를 검출하는 단계를 포함하는 것을 특징으로 한다.
수동형 광가입자 망, 장애 감시 장치, OTDR

公开(公告)号：KR1020100004435A

公开(公告)日：2010-01-13

申请号：KR1020080064595

申请日：2008-07-03

Applicant: 한국과학기술원

Inventor： 이창희 ,  이종훈 ,  최기만 ,  문실구 ,  문정형 ,  이훈근 ,  김준영

IPC: H04B10/03 ,  H04B10/2581 ,  H04B10/27

Abstract: PURPOSE: A network structure for providing existing network services and next-generation network services with a self restoring function and a method for configuring an optical path in the network structure are provided to satisfy evolution to a new NG-PON(New-Generation Passive Optical Network) service and performance upgrading, thereby flexibly releasing a restoring function which drastically improves reliability of a network. CONSTITUTION: A central base station comprises the first legacy PON OLT and the second WDM-PON OLT. The first legacy PON OLT offers an existing PON service. The second WDM-PON OLT offers an NG-PON service. A remote node(RN) comprises the first and second MUX/DEMUX.

Abstract translation: 目的：提供具有自恢复功能的现有网络服务和下一代网络服务的网络结构以及在网络结构中配置光路的方法，以满足新型NG-PON（新一代无源光学 网络）服务和性能升级，从而灵活地释放恢复功能，大大提高了网络的可靠性。 构成：中央基站包括第一传统PON OLT和第二WDM-PON OLT。 第一个传统PON OLT提供现有的PON服务。 第二个WDM-PON OLT提供NG-PON服务。 远程节点（RN）包括第一和第二MUX / DEMUX。

公开(公告)号：KR100914559B1

公开(公告)日：2009-09-02

申请号：KR1020080034395

申请日：2008-04-14

Applicant: 한국과학기술원

Inventor： 이창희 ,  문정형 ,  문실구 ,  최기만

IPC: H04B10/2581 ,  H04J14/02 ,  H04B10/00

CPC classification number: H04B10/501 ,  H04B10/572 ,  H04J14/02

Abstract: A wavelength-tunable laser device for automatically controlling an oscillating wavelength, a method thereof, a wavelength division multiplexed-optical transmission system having the same, and a PON are provided to reduce the man power and time required for finding the oscillation wavelength of a wavelength-tunable laser. The outline scan is performed for a wavelength division multiplexer/demultiplexer(1004). The oscillation wavelength of a wavelength-tunable laser is adjusted to a start wavelength(1006). The output power value of a wavelength discriminator is measured(1008). The start wavelength and an end wavelength are compared(1010). The number of scan operations is increased(1014). An oscillation wavelength in which the difference between a target wavelength of the wavelength-tunable laser and an oscillation wavelength is minimum is searched.

Abstract translation: 提供一种用于自动控制振荡波长的波长可调激光装置，其方法，具有该波长可调谐激光装置的波分复用光传输系统和PON，以减少找到波长的振荡波长所需的人力和时间 可调激光 对波分多路复用器/解复用器执行轮廓扫描（1004）。 将波长可调激光器的振荡波长调节为起始波长（1006）。 测量波长鉴别器的输出功率值（1008）。 比较起始波长和结束波长（1010）。 扫描次数增加（1014）。 搜索波长可调激光器的目标波长与振荡波长之间的差最小的振荡波长。

公开(公告)号：KR100813900B1

公开(公告)日：2008-03-18

申请号：KR1020060109293

申请日：2006-11-07

Applicant: 한국과학기술원

Inventor： 이창희 ,  최기만 ,  문실구 ,  문정형 ,  이훈근

IPC: H04B10/2581 ,  H04B10/27 ,  H04B10/00

CPC classification number: H04J14/0282 ,  H04J14/08 ,  H04Q11/0005 ,  H04Q2011/0009

Abstract: A method and a network structure for upgrading a legacy PON into a next-generation PON based on a TDM-PON are provided to offer a broadband service through an increase of the number of subscribers and the extension of bandwidth while maintaining a currently used TDM-based subscriber network system, using preinstalled optical fibers. A first wavelength band combining/splitting apparatus is positioned between a single mode optical fiber and a first OLT(Optical Line Termination) so that a second OLT which shares the single mode optical fiber and is used in a TDM-PON(Time Division Multiplexing Passive Optical Network) can be added within a different CO(Central Office) which is positioned at a position different from that of a CO. A second wavelength band combining/splitting apparatus is positioned in the front end of a first splitter. A second splitter is connected to the second wavelength band combining/splitting apparatus within an RN(Remote Node) or a different RN at a position different from that of the RN, and can be connected to at least one second group ONT(Optical Network Termination) by at least one second group splitting optical fiber.

Abstract translation: 提供了一种用于将传统PON升级到基于TDM-PON的下一代PON的方法和网络结构，以通过增加用户数量和带宽扩展来提供宽带服务，同时保持当前使用的TDM- 基于用户网络系统，使用预安装的光纤。 第一波段组合/分离装置位于单模光纤与第一OLT（光线路终端）之间，从而共享单模光纤并在TDM-PON（时分多路复用被动）中使用的第二OLT 光网络）可以被添加在不同于CO的位置的不同的CO（中心局）中。第二波段组合/分离装置位于第一分离器的前端。 第二分路器与RN内的RN（远程节点）或不同的RN中的第二波段组合/分离装置连接，并且可以连接到至少一个第二组ONT（光网络终端 ）通过至少一个第二组分裂光纤。