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公开(公告)号：KR1020110005575A
公开(公告)日：2011-01-18
申请号：KR1020090063202
申请日：2009-07-10
Applicant: 한국전자통신연구원
CPC classification number: H04B10/25073 , H04B10/2569 , H04B10/60 , H04B10/611 , H04B10/6161 , H04B10/6162
Abstract: PURPOSE: A digital equalization device of a coherent ray receiver and a method thereof are provided to compensate all kinds of disturbances capable of being generated from an optical line. CONSTITUTION: A photo converter(110) comprises an ADC(Analog to Digital Converter)(115). The photo converter changes a received optical signal into a digital signal. A DSP(Digital Signal Processor)(120) processes the transformed digital signal. The DSP compensate chromatic dispersion or polarization failure of an optical signal. The DSP digitally performs symbol synchronization by using a clock, which is different from a sampling clock of the photo converter.
Abstract translation: 目的：提供一种相干射线接收机的数字均衡装置及其方法，以补偿能够从光线路产生的各种干扰。 构成：光转换器（110）包括ADC（模数转换器）（115）。 光转换器将接收到的光信号变为数字信号。 DSP（数字信号处理器）（120）处理变换的数字信号。 DSP补偿光信号的色散或极化失败。 DSP通过使用与光转换器的采样时钟不同的时钟数字地执行符号同步。
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公开(公告)号：KR100912296B1
公开(公告)日：2009-08-17
申请号：KR1020070096144
申请日：2007-09-20
Applicant: 한국전자통신연구원
IPC: H04B10/07 , H04B10/2581 , H04B10/27
CPC classification number: H04J14/0297 , H04J14/0227 , H04J14/0246 , H04J14/025
Abstract: 광 전달망(optical transport network, OTN)에서의 광 감시채널(optical supervisory channel, OSC)의 역할을 보장하기 위한 네트워크 장치 및 그 방법이 개시된다. 본 발명의 네트워크 노드는 OSC 유니트를 다중화하여 하나를 주 유니트로 설정하고, 나머지를 보조 유니트로 설정하여 주 유니트의 동작 이행 불가시 보조 유니트가 동작을 수행토록 함을 특징으로 한다. 이에 의해 광 감시채널의 안정적인 역할을 보장할 수 있다.
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公开(公告)号：KR1020090030686A
公开(公告)日：2009-03-25
申请号：KR1020070096144
申请日：2007-09-20
Applicant: 한국전자통신연구원
IPC: H04B10/07 , H04B10/2581 , H04B10/27
CPC classification number: H04J14/0297 , H04J14/0227 , H04J14/0246 , H04J14/025
Abstract: A network apparatus for guaranteeing the role of an optical supervisory channel and a method therefor are provided to guarantee the signal protection by multiplexing an OSC unit so that an assistant unit operates when a main unit cannot be operated. OSC-WDM(Optical Supervisory Channel-Wavelength Division Multiplexing) couplers(410-1,410-2) of each input stage separates the OSCs inputted from a plurality of input stages from a WDM wavelength channel. A plurality of channel branching units(420-1,420-2) receives OSCs separated from different OSC-WDM couplers and branches/outputs them. Two or more OSC units (430-1,430-2) receives the branched-outputted OSCs, and then processes/outputs the OSC signals. A plurality of channel transferring units(440-1,440-2) delivers the outputted OSCs to a corresponding output stage OSC-WDM coupler among output stage OSC-WDM couplers(450-1,450-2) corresponding to each input stage OSC-WDM coupler.
Abstract translation: 提供一种用于保证光学监控信道的作用的网络设备及其方法，用于通过复用OSC单元来保证信号保护，使得当主单元不能操作时辅助单元操作。 每个输入级的OSC-WDM（光监控信道 - 波分复用）耦合器（410-1,410-2）将从多个输入级输入的OSC与WDM波长信道分离。 多个信道分支单元（420-1,420-2）接收从不同OSC-WDM耦合器分离并分支/输出的OSC。 两个或多个OSC单元（430-1,430-2）接收分支输出的OSC，然后处理/输出OSC信号。 多个信道传送单元（440-1,440-2）将输出的OSC传送到对应于每个输入级OSC-WDM耦合器的输出级OSC-WDM耦合器（450-1,450-2）中的对应的输出级OSC-WDM耦合器。
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公开(公告)号：KR100833501B1
公开(公告)日：2008-05-29
申请号：KR1020060114097
申请日：2006-11-17
Applicant: 한국전자통신연구원
IPC: H04B10/2581 , H04B10/00 , H04B10/27
CPC classification number: H04Q11/0005 , H04J14/0204 , H04J14/0212 , H04J14/0213 , H04J14/0217 , H04J14/0219 , H04Q2011/0015 , H04Q2011/0016 , H04Q2011/0039 , H04Q2011/0052
Abstract: 본 발명은 파장 분할 다중화된 광신호의 경로간 상호 연결과 파장변환이 가능한 파장교환회선 분배(wavelength interchange cross connector) 기능을 갖는 네트워크 노드와 운용 방법에 관한 것으로, 다차원 회선 분배기를 사용함으로써 노드에서 분기 / 결합되지 않는 신호에 대해서는 전기 신호로 변환하지 않고 광신호 형태로 통과시키고 분기 / 결합할 신호만을 광전변환과 전광변환하여 시스템의 비용을 감소시키고 구조를 단순화 시킬수 있으며 열화 (degradation)된 신호를 재생하여 네트워크의 확장성을 증가시키며 저속의 전기적 디지털 계위 단위신호를 Grooming 하여 대역폭을 효율적으로 사용할 수 있다. 나아가, 별도의 파장 변환기를 사용하지 않고 파장변환을 수행하여 네트워크 자원의 가용성을 증가시키고, 광학적 스위칭을 위하여 모든 신호를 파장별로 분리하지 않아 필터링에 의한 신호 열화를 방지하고 입력되는 모든 파장에 대하여 멀티캐스팅이 가능하다.
파장 선택형 스위치 (WSS), 파장 분할, 유니캐스트, 멀티캐스트-
公开(公告)号：KR1020070058860A
公开(公告)日：2007-06-11
申请号：KR1020050117656
申请日：2005-12-05
Applicant: 한국전자통신연구원
CPC classification number: H04Q11/0067 , H04B10/297 , H04Q11/0066 , H04Q2011/0079
Abstract: A PON(Passive Optical Network) system for increasing the number of optical network units is provided to simultaneously connect a lot of ONUs(Optical Network Units) to one PON by using optical amplifiers, thereby lowering a service cost as reducing a management cost of the network. The first coupler(310) transmits downstream signals sent to ONUs from an OLT(Optical Line Terminal), through the first path, and transmits upstream signals sent to the OLT from the ONUs, through the second path. The second coupler(320) consists of one end individually connected to each end of the first and second paths of the first coupler(310), and the other end for individually transmitting the upstream and downstream signals through one path. A downstream optical amplifier(340) is located on the first path, and compensates loss of the downstream signals. An upstream optical amplifier(330) is located on the second path, and compensates loss of the upstream signals.
Abstract translation: 提供用于增加光网络单元数量的PON（无源光网络）系统，以通过使用光放大器来同时将大量ONU（光网络单元）连接到一个PON，从而降低服务成本，从而降低管理成本 网络。 第一耦合器（310）通过第一路径从OLT（光线路终端）发送发送到ONU的下行信号，并通过第二路径从ONU发送发送到OLT的上行信号。 第二耦合器（320）由一端独立地连接到第一耦合器（310）的第一和第二路径的每一端，另一端用于通过一条路径单独地发送上行和下行信号。 下游光放大器（340）位于第一路径上，并补偿下行信号的损耗。 上游光放大器（330）位于第二路径上，并补偿上游信号的损耗。
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Patent Agency Ranking
公开(公告)号：KR1020050034199A
公开(公告)日：2005-04-14
申请号：KR1020030070042
申请日：2003-10-08
Applicant: 한국전자통신연구원
IPC: H04B10/291 , H04B10/2581
CPC classification number: H01S3/302 , H01S3/06754 , H01S3/094076 , H01S3/094096 , H01S3/1301 , H01S3/1305
Abstract: 라만 증폭기 및 라만 펌핑 방법이 개시된다. 광원부는 파장이 주기적으로 변하는 펌핑광을 출력한다. 광세기조절부는 펌핑광에 의한 라만이득의 신호밴드내에서의 이득 평탄도를 높이기 위하여 펌핑광의 광세기를 조절한다. 제어부는 광세기조절부에 의한 펌핑광의 광세기 조절이 펌핑광의 파장변화와 동기되도록 제어한다. 이로써, 넓은 신호 밴드(signal bandwidth)에서 평탄(flat)한 라만 이득을 얻을 수 있다
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公开(公告)号：KR1020050028733A
公开(公告)日：2005-03-23
申请号：KR1020030065253
申请日：2003-09-19
Applicant: 한국전자통신연구원
IPC: H01S3/10
CPC classification number: H01S3/10007 , H01S3/06754 , H01S3/10023 , H01S3/2375 , H01S3/302 , H01S2301/04
Abstract: An optical fiber amplifier is provided to enlarge an input power dynamic range by obtaining a flat gain spectrum by implementing an optical fiber between two amplifiers to obtain a Raman gain. First and second gain portions(201,202) include a gain medium and at least one pump. An optical fiber(204) is arranged between the first and second gain portions. A Raman amplifier(205) applies a pumping light on the optical fiber. A coupler(206) couples the pumping light outputted from the Raman amplifier with the optical fiber. A gain flattening filter is further included in the optical fiber amplifier to improve gain flatness.
Abstract translation: 提供光纤放大器以通过在两个放大器之间实现光纤获得平坦的增益光谱来扩大输入功率动态范围，以获得拉曼增益。 第一和第二增益部分（201,202）包括增益介质和至少一个泵。 光纤（204）布置在第一和第二增益部分之间。 拉曼放大器（205）在光纤上施加泵浦光。 耦合器（206）将从拉曼放大器输出的泵浦光与光纤耦合。 增益平坦滤波器还包括在光纤放大器中以改善增益平坦度。
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公开(公告)号：KR100440568B1
公开(公告)日：2004-07-21
申请号：KR1020010074724
申请日：2001-11-28
Applicant: 한국전자통신연구원
IPC: H04B10/2507 , H04B10/2581
Abstract: PURPOSE: A broadband optical link control apparatus is provided to restrain amplification characteristics change of an optical repeater by compensating a loss change of an optical transmission line and a loss spectrum change. CONSTITUTION: Pump lasers(211,213) with the same wavelength are coupled through polarization couplers(215,217) to obtain a high output pumping light and a gain independent on polarization. Pumping light sources of each wavelength are coupled to one optical fiber through a pump WDM coupler(218) and made incident on an optical transmission light connected to an optical connector(201) through a pump/signal WDM coupler(202), and then, the transmitting optical fiber is induced to Raman scattering. An output strength of the optical signal from the optical connector(206) is fixed by a value determined by a reference voltage(306). That is, the optical signal branched through a monitoring optical coupler(205) is converted to an electric signal, that is, a voltage, in an optical detector(301), and a difference value between the converted voltage and the reference voltage(306) is outputted from an attenuator(304), passes through an integrator(305), and is inputted to a variable optical attenuator(204). The variable optical attenuator(204) controls an attenuation rate in proportion to an output voltage of the integrator(305), so that the output strength of the optical signal transmitted to the optical connector(206) has a fixed value. A portion of the optical signal output which has passed through the pump/signal WDM coupler(202), an optical separator(203) and the optical attenuator(204) is outputted through the monitoring optical coupler(205).
Abstract translation: 目的：提供一种宽带光链路控制装置，通过补偿光传输线路的损耗变化和损耗频谱变化来抑制光中继器的放大特性变化。 构成：具有相同波长的泵浦激光器（211,213）通过偏振耦合器（215,217）耦合以获得高输出泵浦光和与偏振无关的增益。 每个波长的泵浦光源通过泵浦WDM耦合器（218）耦合到一根光纤，并通过泵/信号WDM耦合器（202）入射到与光连接器（201）连接的光传输光上，然后， 传输光纤被诱导成拉曼散射。 来自光学连接器（206）的光信号的输出强度被由参考电压（306）确定的值固定。 即，通过监视用光耦合器（205）分支的光信号在光检测器（301）中被转换为电信号，即电压，转换电压与基准电压（306）之间的差分值 ）从衰减器（304）输出，通过积分器（305），并被输入到可变光衰减器（204）。 可变光衰减器（204）控制与积分器（305）的输出电压成比例的衰减率，使得传输到光连接器（206）的光信号的输出强度具有固定值。 已经通过泵/信号WDM耦合器（202），光分离器（203）和光衰减器（204）的一部分光信号输出通过监视光耦合器（205）输出。
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公开(公告)号：KR1020170082274A
公开(公告)日：2017-07-14
申请号：KR1020160001487
申请日：2016-01-06
Applicant: 한국전자통신연구원
IPC: H04J14/04 , H04B10/2581 , H04B10/50
Abstract: 본발명은모드분할다중(MDM: Mode Division Multiplexing) 광전송방식을사용하는광통신시스템및 그방법에대한것으로, 멀티모드제어광 신호송신기, 멀티모드제어광 수신기, 멀티모드광 섬유를포함할수 있으며, 레이저다이오드에서출력된단일파장광 신호를위상판을이용하여모드별 광신호로변환하여수 모드광섬유를통해송신한후, 이를다시위상판을이용하여모드별 광신호를단일파장광 신호로변환하여수신함으로써전송용량을증가하고장치구성을간소화할 수있다.
Abstract translation: 本发明涉及使用模式分割多路复用（MDM）光传输系统的光通信系统及其方法，并且可以包括多模控制光信号发射器，多模控制光接收器和多模光纤。 从二极管输出的单波长光信号通过使用相位板被转换成模式特定光信号，通过数模光纤传输，通过接收模数转换光信号转换成单波长光信号， 增加传输容量并简化设备配置。
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公开(公告)号：KR1020140117971A
公开(公告)日：2014-10-08
申请号：KR1020130032990
申请日：2013-03-27
Applicant: 한국전자통신연구원
IPC: H04B10/548
CPC classification number: H04B10/5561 , H04B10/5053 , H04B10/50575
Abstract: The present invention relates to an optical transmitter which comprises: an optical modulator including a first modulator in the form of a Mach-Zehnder interferometer connected in parallel, a second modulator, and a phase shift portion connected to the second modulator in series; a high speed signal generation unit for generating a single carrier signal or a multiple carrier signal to apply to the optical modulator; and an output stabilization unit for controlling bias for each of the first modulator, the second modulator, and the phase shift portion and stabilizing a final output optical signal of the optical modulator.
Abstract translation: 光发射机技术领域本发明涉及一种光发射机，包括：光调制器，包括并联连接的马赫 - 曾德干涉仪形式的第一调制器，第二调制器和串联连接到第二调制器的相移部分; 用于产生单载波信号或多载波信号以应用于光调制器的高速信号产生单元; 以及输出稳定单元，用于控制第一调制器，第二调制器和相移部分中的每一个的偏置，并稳定光调制器的最终输出光信号。
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