Abstract:
다중 모드 광섬유 증폭을 위한 광 펌핑 장치가 개시된다. 본 발명의 일 실시 예에 따른 광 펌핑 장치는 펌핑 광을 발생하는 펌핑 광원과, 펌핑 광원에서 발생한 펌핑 광의 광 파워를 분배하는 광 파워 분배기와, 광 파워 분배기에서 분배된 펌핑 광들을 다수 개의 단일 모드 광섬유를 통해 입력받고 입력받은 펌핑 광들을 다중화하여 모드 별로 광 선로의 다중 모드 광섬유 증폭기에 인가함에 따라 다중 모드 광섬유 증폭기에서 펌프 광에 의해 신호 광을 증폭하여 얻는 이득의 모드 간 차이를 조절하는 모드 먹스를 포함한다.
Abstract:
Disclosed are an apparatus and a method for controlling a multicarrier light source generator. According to an embodiment of the present invention, the apparatus for controlling the multicarrier light source generator includes: N number of light source input units configured to input light sources to a multicarrier light source generator that generates multicarrier light sources at a frequency interval of F [Hz]; and a control unit configured to adjust the frequency interval of the multicarrier light sources generated from the multicarrier light source generator, by adjusting a frequency interval between the light sources input from the N number of light source input unit as F/N [Hz].
Abstract translation:公开了一种用于控制多载波光源发生器的装置和方法。 根据本发明的实施例,用于控制多载波光源发生器的装置包括:N个光源输入单元,被配置为将光源输入到多载波光源发生器,该多载波光源发生器以频率间隔F [ 赫兹]; 以及控制单元,通过将从N个光源输入单元输入的光源之间的频率间隔调整为F / N [Hz],来调整从多载波光源发生器产生的多载波光源的频率间隔。
Abstract:
직교 주파수 분할 다중화 방식의 I/Q 불균형 보상을 위한 수신 장치가 개시된다. 수신 장치는 수신 신호를 기저대역의 I(In-phase) 채널 신호와 Q(Quadrature) 채널 신호로 복조하는 I/Q 복조부, 및 복조된 I 채널 신호와 Q 채널 신호의 불균형을 시간 영역에서 보상하는 I/Q 불균형 보상부를 포함한다. 이를 통해 I/Q 불균형을 해결할 수 있으며, 결과적으로 직교 주파수 분할 다중화 방식 통신 장치의 성능 저하를 억제할 수 있다.
Abstract:
PURPOSE: An OFDM(Orthogonal Frequency Division Multiplexing) optical transmitting device, a transmitting method thereof, an orthogonal frequency division multiplexing optical receiving device, and a receiving method thereof are provided to amplify a signal by differentiating the amplification ratio corresponding to the amplitude of the signal which is modulated with an OFDM method in an OFDM optical transmitting process. CONSTITUTION: A signal amplitude control unit(130) amplifies a plurality of data signals modulated with an OFDM method by using other amplification factors corresponding to amplitudes of the data signals. A serial-parallel conversion unit(110) converts a serial data bit into a parallel data bit. A symbol mapper(115) performs symbol mapping of the parallel data bit. A training symbol insertion unit(120) inserts a training symbol into the plurality of data signals. An IFFT(Inverse Fast Fourier Transform) unit(125) performs IFFT of the plurality of data signals. [Reference numerals] (110) Serial-parallel conversion unit; (115) Symbol mapper; (120) Training symbol insertion unit; (130) Signal amplitude control unit; (135) Parallel-serial conversion unit; (140) Guard interval insertion unit; (150) I/Q modulator
Abstract:
PURPOSE: A phase offset controlling method of an optical signal receiving device is provided to accurately control the phase offset between a signal which is delayed and a signal which is not delayed in optical delay interference for receiving a modulated optical signal. CONSTITUTION: An optical signal receiving apparatus receives an optical signal which is modulated by DQPSK(Differential Quadrature Phase Shift Keying)(800). The optical signal receiving apparatus delays the optical signal. The optical signal receiving apparatus generates a control signal(840). The optical signal receiving apparatus controls the phase offset of inter-signal interference(860).
Abstract:
An optical transmission node for supporting a mesh-type WDM optical network is provided to reduce the number of WDM transceivers used in each node according as all added and dropped signals pass through an electric line distribution switch by the control of an optical switch in a node capable of supporting nxn(n>=2) optical fiber input/output, thereby improving the efficiency of the network and economical efficiency. N ROADMs(Reconfigurable Optical Add Drop Multiplexers)(501~504) separate a specific wavelength channel from multiple wavelength channel optical signals inputted from a predetermined node configuring an optical network, pass the rest of the separated wavelength channel, and combine added other wavelength channels with the passing wavelength channel to pass the combined wavelength channel. An optical transceiver converts an optical signal and an electric signal mutually and outputs the optical signal of the wavelength channel. An Nx1 optical switch selects the specific wavelength channel separated from one of the N ROADMs to input the specific wavelength channel to the optical transceiver, and selects one of the N ROADMs to connect the selected one to a wavelength channel outputted from the optical transceiver. An electric line distribution switch(530) drops a part of electric signals of the specific wavelength channel separated from the selected ROADM to an external client, and combines the rest of the dropped electric signals with a signal added from the external client to form the electric signal of the wavelength channel and output the electric signal to the optical transceiver.
Abstract:
WT-PON은시분할다중화방식및 파장분할다중화방식에따라상향광 신호및 하향광 신호를전송할수 있다. WT-PON에포함된 OLT 및 ONU는사용하는파장의개수를증가시킴으로써, 파장당최대전송속도이상의전송속도를지원할수 있다. OLT에서 ONU로전송되는하향광 신호의중심파장은하향파장대역에서선택될수 있고, ONU에서 OLT로전송되는상향광 신호의중심파장은상향파장대역에서선택될수 있다. 상향파장대역및 하향파장대역에포함되는복수의중심파장들은 O-Band 또는 C-Band의파장대역에서선택될수 있다. 하향파장대역의복수의중심파장들은 LAN WDM 파장대역에서선택될수 있다. 상향파장대역의복수의중심파장들은 10G EPON의상향파장대역또는 CWDM 파장대역에서선택될수 있다. 상향파장대역의복수의중심파장들은상향광 신호의버스트모드에따라분리되어설정되거나, 또는서로다른버스트모드에기초한상향광 신호에의해공유되도록설정될수 있다.