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公开(公告)号：KR1020020027061A
公开(公告)日：2002-04-13
申请号：KR1020000058299
申请日：2000-10-04
Applicant: 한국과학기술원
IPC: H04B10/2581 , H04B10/516
CPC classification number: H04J14/0224 , H04B10/2941 , H04B10/675
Abstract: PURPOSE: A metro WDM(Wavelength Division Multiplexing) system having a direct modulation type by an optical filtering method is provided to effectively control a color distribution effect by chirping generated in a direct modulation system, a penalty by an optical extinction ratio, and a nonlinear effect generated in multi-channel transmission, so that a transmission distance can be extended. CONSTITUTION: An LD(Laser Diode,10) mounted on a transmission unit, is directly modulated through a laser operator to change a carrier of a laser. A first AWG(Arrayed-Waveguide Grating,20) multiplexes and optically filters wavelength divided signals. A first booster amplifier(30) outputs and amplifies the optical signals generated from the first AWG(20). A first SMF(Single Mode Fiber,40) transmits the optical amplifying signals outputted from the first booster amplifier(30) through an optical fiber. An in-line amplifier(50) re-amplifies the optical amplifying signals through an in-line. A second SMF(60) transmits the re-amplified optical signals through the optical fiber to a receiving unit. A second AWG(70) de-multiplexes and optically filters the optical signals multiplexed in the transmission unit. And an optical receiver(80) receives the optical signals generated from the second AWG(70).
Abstract translation: 目的：提供一种通过光学滤波方法具有直接调制方式的城域WDM（波分复用）系统，以通过在直接调制系统中产生的线性调频，光消光比的惩罚以及非线性 在多通道传输中产生的效果，从而可以延长传输距离。 构成：安装在传输单元上的LD（激光二极管10）通过激光操作器直接调制以改变激光器的载体。 第一AWG（阵列波导光栅，20）复用并光学滤波波长分割信号。 第一升压放大器（30）输出并放大从第一AWG（20）产生的光信号。 第一SMF（单模光纤，40）通过光纤传输从第一升压放大器（30）输出的光放大信号。 在线放大器（50）通过直列式重放放大信号。 第二SMF（60）通过光纤将再放大的光信号发送到接收单元。 第二AWG（70）对在传输单元中复用的光信号进行解复用和光学滤波。 并且光接收器（80）接收从第二AWG（70）产生的光信号。
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公开(公告)号：KR1020020027057A
公开(公告)日：2002-04-13
申请号：KR1020000058295
申请日：2000-10-04
Applicant: 한국과학기술원
IPC: H04B10/03 , H04B10/07 , H04B10/2581 , H04B10/275
CPC classification number: H04B10/275 , H04B10/032 , H04B10/077 , H04B10/07955 , H04B10/27 , H04J14/0227 , H04J14/0241 , H04J14/0283 , H04J14/0291
Abstract: PURPOSE: A retrieval method after recovery of a WDM(Wave Division Multiplexing) system of a ring-type optical communication network is provided to make two nodes, directly connected with a failed optical fiber, form a closed-loop when recovering the optical fiber, and to make a gain of the closed loop exceed 1 to lead lasing, so that optical signals under transmission with a standby optical fiber can be transferred to an operating optical fiber. CONSTITUTION: If multiple nodes(14a-14d) are connected through an operating optical fiber(10) and a standby optical fiber(12) and a failure is generated while optical signals are transmitted with the operating optical fiber(10) in a normal state, the failure is detected using light receiving elements inside the nodes(14a-14d). Space switches configuring nodes(14c,14d) adjacent to a failure generating block is controlled. A signal passing the failure generating block is transferred to the standby optical fiber(12). The failed operating optical fiber(10) is recovered, to form a closed loop(20) by the operating optical fiber(10), the standby optical fiber(12) and the adjacent nodes(14c,14d). A loop gain of the closed loop(20) is made to be larger than 1(one), to lead lasing in the closed loop(20). The nodes(14c,14d) monitor an optical strength of the failure generating block, to control a switch(SW) and recover an optical communication network to a normal state if the optical strength exceeds a predetermined value.
Abstract translation: 目的：提供环形光通信网络WDM（波分复用）系统恢复后的检索方法，使光纤恢复时与故障光纤直接相连的两个节点形成闭环， 并且使闭环的增益超过1以引导激光，使得用备用光纤传输的光信号可以被传送到操作光纤。 构成：如果通过工作光纤（10）和备用光纤（12）连接多个节点（14a-14d），并且当光信号以工作光纤（10）发送到正常状态时产生故障 ，使用节点（14a-14d）内的光接收元件来检测故障。 配置与故障生成块相邻的节点（14c，14d）的空间交换机被控制。 通过故障生成块的信号被传送到备用光纤（12）。 通过操作光纤（10），备用光纤（12）和相邻节点（14c，14d）恢复故障的工作光纤（10）以形成闭环（20）。 使闭环（20）的环路增益大于1（1），以在闭环（20）中引出激光。 如果光强度超过预定值，则节点（14c，14d）监视故障产生块的光强度，以控制开关（SW）并将光通信网络恢复到正常状态。
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公开(公告)号：KR100330411B1
公开(公告)日：2002-03-27
申请号：KR1020000005652
申请日：2000-02-07
Applicant: 한국과학기술원
IPC: H04B10/2581
Abstract: 최근에 연구되고 있는 파장분할다중 전송방식 광통신망에서는 각 노드마다 애드/드롭 다중화기를 가지고 신호를 애드하거나, 드롭하는 기능을 가져야 한다.
종래의 단방향 애드/드롭 다중화기는 같은 방향의 신호만을 애드/드롭할 수 있기 때문에, 광통신망에서 양방향으로 신호를 전송하기 위해서는 노드마다 2 개의 애드/드롭 다중화기가 필요하였다.
본 발명에서 제안한 애드/드롭 다중화기는 하나의 N x N 도파관열 격자 다중화기를 이용하여 역다중화와 다중화를 동시에 구현한다. 그리고, 별도의 대역통과 필터를 사용하지 않고 신호의 파장을 교대로 할당하여 다중화기의 투과 특성을 통해 상대강도 잡음을 효과적으로 제거한다. 또한, 제안된 다중화기는 향후 신호의 용량이 증가할 경우, 이를 고가의 N x N 다중화기의 교체 없이 저가의 다중화기와 역다중화기의 추가만으로 수용할 수 있다. 이와 같은 양방향 애드/드롭 다중화기와 광증폭기를 조합하여 양방향 애드/드롭 광증폭기 모듈을 구현한다. 본 발명에 따른 양방향 파장분할다중 애드/드롭 광증폭기 모듈은 효율적이고 경제적이며, 양방향 파장다중방식 광통신망을 제작하는 데 적합하다는 장점을 가진다.-
公开(公告)号：KR100317140B1
公开(公告)日：2001-12-22
申请号：KR1019990034512
申请日：1999-08-20
Applicant: 한국과학기술원
IPC: G01J1/26
Abstract: 본발명은자연방출광판별신호와대역통과광 가변필터를사용하여파장분할다중방식의광통신시스템에서파장분할다중된광신호의파장과광 세기와광신호대 잡음비(optical signal-to-noise ratio)를측정하는장치에관한것이다. 이러한본 발명은, 파장분할다중된광신호중 일부분을분기하는분기수단과, 자연방출광을출력하는자연방출광원, 상기자연방출광을입력받아기설정된파장부분을반사하여자연방출광판별신호로출력하는반사수단, 상기분기수단으로부터분기된파장분할다중된광신호와상기자연방출광판별신호가합쳐진광 스펙트럼곡선을출력하는대역통과광 가변필터, 상기대역통과광 가변필터로부터출력되는광 스펙트럼곡선을전기신호로변환하는광/전변환수단, 및상기전기신호로부터파장분할다중된광신호의파장과광 세기와광신호대 잡음비를계산하는신호처리기를포함한다.
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公开(公告)号：KR100292809B1
公开(公告)日：2001-06-15
申请号：KR1019990008593
申请日：1999-03-15
Applicant: 한국과학기술원
IPC: H04B10/07 , H04B10/2581
Abstract: 본발명은자연방출광판별신호와대역통과광 가변필터를사용하여파장분할다중방식의광통신시스템에서파장분할다중된광신호의파장과광 세기와광신호대 잡음비를측정하는장치에관한것이다. 이러한본 발명은, 파장분할다중된광신호중 일부분을분기하는분기수단과, 상기분기수단에서분기되지않은파장분할다중된광신호를증폭하여자연방출광과함께출력하는광 증폭수단, 특정파장의상기자연방출광을반사하여자연방출광판별신호를출력하는반사수단, 상기반사수단을통과한광신호를한 방향으로만진행시켜광섬유에서의레일레이(Rayleigh) 산란이나불연속점에서의광신호반사에의하여측정에오류가발생하는것을막는광 고립기(optical isolator), 투과파장이제어신호에따라가변되어상기분기수단에서분기된파장분할다중된광신호와상기자연방출광판별신호가합쳐진광 스펙트럼곡선을출력하는대역통과광 가변필터, 상기제어신호를상기대역통과광 가변필터에제공하는제어신호발생기, 상기대역통과광 가변필터에서출력되는광 스펙트럼을전기신호로변환하는광/전(光/電) 변환수단, 및상기광/전변환수단으로부터출력되는상기전기신호와상기제어신호발생기로부터출력되는상기제어신호를이용하여광신호의파장과광 세기와광신호대 잡음비를계산하는신호처리기를포함한다.
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Patent Agency Ranking
公开(公告)号：KR1020000065349A
公开(公告)日：2000-11-15
申请号：KR1019990011547
申请日：1999-04-02
Applicant: 한국과학기술원
CPC classification number: H04B10/0773 , H04B10/0771 , H04B2210/075 , H04J14/0221 , H04J14/0227 , H04J14/0241 , H04J14/0276 , H04J14/0298 , H04Q11/0005 , H04Q2011/0049 , H04Q2011/0083
Abstract: PURPOSE: An apparatus for monitoring an optical path by the discrimination of an input terminal in an optical circuit distribution system is provided to supervise an optical path through the discrimination of an input terminal in an optical circuit distribution system. CONSTITUTION: A pilot tone synthesizing unit(610) synthesizes an intrinsic low-speed pilot tone with a wavelength division multiplexed optical signal supplied through an input terminal. A one(1) x two(2) optical branch unit(620) branches the optical signal synthesized with the pilot tone and sends them to a pilot tone detection unit(630). The pilot tone detection unit(630), after detecting the pilot tone from the optical signal and recognizing from which input terminal the optical signal comes, detects and outputs an error of a path using routing information inputted from a switching control unit.
Abstract translation: 目的：提供一种通过鉴别光路分配系统中的输入端子来监视光路的装置，用于通过鉴别光电路分配系统中的输入端来监视光路。 构成：导频音合成部（610）通过输入端提供的波分多路复用光信号合成本征低速导频音。 一（1）×2（2）光分支单元（620）将由导频音合成的光信号分支，并将它们发送到导频音检测单元（630）。 导频音检测单元（630）在从光信号中检测到导频音并从光信号到来的哪个输入端识别出之后，使用从切换控制单元输入的路由信息来检测并输出路径的错误。
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37.发明公开
公开(公告)号：KR1020000009290A
公开(公告)日：2000-02-15
申请号：KR1019980029579
申请日：1998-07-23
Applicant: 한국과학기술원
IPC: H04J14/02 , H04B10/2581
CPC classification number: H04J14/02
Abstract: PURPOSE: A wavelength division multiplexing type multiplexor/demultiplexor capable of simultaneously multiplexing and demultiplexing upper and lower signals by means of two WGRs which are installed at center and local base stations is provided. CONSTITUTION: The wavelength division multiplexing type multiplexor/demultiplexor comprising: one multiplexor/demultiplexor including N(where, N is a natural number) input and output terminals, wherein wavelength divided signals of one direction inputted through the N input and output terminals are multiplexed in one output terminal and are outputted therethrough, wavelength divided signals of other direction inputted through one residue input and output terminal are demultiplexed in N residue output terminals and are outputted therethrough.
Abstract translation: 目的：提供一种能够通过安装在中心和本地基站的两个WGR同时复用和解复用上，下信号的波分复用多路复用器/解复用器。 构成：波分复用多路复用器/解复用器，包括：一个多路复用器/解复用器，包括N（其中，N是自然数）输入和输出端，其中通过N个输入和输出端输入的一个方向的波长分频信号被多路复用 一个输出端并输出，通过一个残留输入和输出端输入的其他方向的波长分割信号在N个残留输出端被解复用并被输出。
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公开(公告)号：KR1020000001105A
公开(公告)日：2000-01-15
申请号：KR1019980021158
申请日：1998-06-08
Applicant: 에스케이텔레콤 주식회사 , 한국과학기술원
CPC classification number: H04B10/25753 , H04B10/25758 , H04B10/291 , H04J14/0205
Abstract: PURPOSE: An apparatus of optical transmission is provided to reduce the number of connection optical fiber lines within a wireless telecommunication base station system. CONSTITUTION: The apparatus comprises a central base station, one optical fiber line(310), a first signal coupler and a small base station. The central base station transmits many signals by a wavelength division multiple coupling, and distributes a received optical signal into many signals. The optical fiber line(310) transmits the coupled optical signals from the central base station via the first signal coupler, and transmits the multiplexed optical signal to the central base station via the first signal coupler. The small base station converts the optical signal from the first signal coupler into an electrical signal.
Abstract translation: 目的：提供一种光传输装置，以减少无线电信基站系统内连接光纤线路的数量。 构成：该装置包括中央基站，一根光纤线路（310），第一信号耦合器和小型基站。 中心基站通过波分复用耦合传输许多信号，并将接收的光信号分配到许多信号中。 光纤线路（310）经由第一信号耦合器从中央基站发送耦合光信号，并通过第一信号耦合器将复用的光信号发送到中心基站。 小型基站将来自第一信号耦合器的光信号转换为电信号。
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公开(公告)号：KR101898417B1
公开(公告)日：2018-09-13
申请号：KR1020180057736
申请日：2018-05-21
Applicant: 한국과학기술원
IPC: H04B10/85 , H04B10/071 , H04L9/08
Abstract: 본발명에따른보안에향상된고속통신시스템은, 광손실측정기(OTDR, optical time domain reflectometer)를구비하는보안이향상된고속통신시스템에있어서, 광손실측정기는, 제1광펄스를출력하는제1광원; 제1광펄스를적어도 2이상의경로로나누며, 나누어진제1광펄스중의하나를광통신선로에전달하는커플러; 커플러로부터, 나누어진제1광펄스중의나머지를수신하여광통신선로에제1광펄스가인가됨을확인하는광 검출기; 광통신선로에제1광펄스가인가되면, 제1광펄스보다세기가약한제2광펄스를광통신선로에인가하는제2광원; 광통신선로에서반사되어돌아오는제1광펄스및 제2광펄스의광 신호를수신하며, 수신되는광 신호로부터제1광펄스및 제2광펄스의물리적인변화를감지하는광 수신부; 및광 수신부에의해감지된제1광펄스및 제2광펄스의물리적인변화에따라광통신선로의신호누수를분석또는예측하는제어부를포함한다.
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公开(公告)号：KR20180062995A
公开(公告)日：2018-06-11
申请号：KR20180057736
申请日：2018-05-21
Applicant: 한국과학기술원
IPC: H04B10/85 , H04B10/071 , H04L9/08
CPC classification number: H04B10/85 , H04B10/0705 , H04B10/071 , H04L9/0852
Abstract: 본발명에따른보안에향상된고속통신시스템은, 광손실측정기(OTDR, optical time domain reflectometer)를구비하는보안이향상된고속통신시스템에있어서, 광손실측정기는, 제1광펄스를출력하는제1광원; 제1광펄스를적어도 2이상의경로로나누며, 나누어진제1광펄스중의하나를광통신선로에전달하는커플러; 커플러로부터, 나누어진제1광펄스중의나머지를수신하여광통신선로에제1광펄스가인가됨을확인하는광 검출기; 광통신선로에제1광펄스가인가되면, 제1광펄스보다세기가약한제2광펄스를광통신선로에인가하는제2광원; 광통신선로에서반사되어돌아오는제1광펄스및 제2광펄스의광 신호를수신하며, 수신되는광 신호로부터제1광펄스및 제2광펄스의물리적인변화를감지하는광 수신부; 및광 수신부에의해감지된제1광펄스및 제2광펄스의물리적인변화에따라광통신선로의신호누수를분석또는예측하는제어부를포함한다.
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